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-rw-r--r--security/tomoyo/.gitignore3
-rw-r--r--security/tomoyo/Kconfig87
-rw-r--r--security/tomoyo/Makefile16
-rw-r--r--security/tomoyo/audit.c478
-rw-r--r--security/tomoyo/common.c2879
-rw-r--r--security/tomoyo/common.h1334
-rw-r--r--security/tomoyo/condition.c1122
-rw-r--r--security/tomoyo/domain.c942
-rw-r--r--security/tomoyo/environ.c123
-rw-r--r--security/tomoyo/file.c1045
-rw-r--r--security/tomoyo/gc.c670
-rw-r--r--security/tomoyo/group.c209
-rw-r--r--security/tomoyo/load_policy.c110
-rw-r--r--security/tomoyo/memory.c207
-rw-r--r--security/tomoyo/mount.c240
-rw-r--r--security/tomoyo/network.c777
-rw-r--r--security/tomoyo/policy/exception_policy.conf.default2
-rw-r--r--security/tomoyo/realpath.c315
-rw-r--r--security/tomoyo/securityfs_if.c272
-rw-r--r--security/tomoyo/tomoyo.c594
-rw-r--r--security/tomoyo/util.c1101
21 files changed, 12526 insertions, 0 deletions
diff --git a/security/tomoyo/.gitignore b/security/tomoyo/.gitignore
new file mode 100644
index 000000000..9f300cdce
--- /dev/null
+++ b/security/tomoyo/.gitignore
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+builtin-policy.h
+policy/*.conf
diff --git a/security/tomoyo/Kconfig b/security/tomoyo/Kconfig
new file mode 100644
index 000000000..b9f867100
--- /dev/null
+++ b/security/tomoyo/Kconfig
@@ -0,0 +1,87 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config SECURITY_TOMOYO
+ bool "TOMOYO Linux Support"
+ depends on SECURITY
+ depends on NET
+ select SECURITYFS
+ select SECURITY_PATH
+ select SECURITY_NETWORK
+ select SRCU
+ select BUILD_BIN2C
+ default n
+ help
+ This selects TOMOYO Linux, pathname-based access control.
+ Required userspace tools and further information may be
+ found at <http://tomoyo.sourceforge.jp/>.
+ If you are unsure how to answer this question, answer N.
+
+config SECURITY_TOMOYO_MAX_ACCEPT_ENTRY
+ int "Default maximal count for learning mode"
+ default 2048
+ range 0 2147483647
+ depends on SECURITY_TOMOYO
+ help
+ This is the default value for maximal ACL entries
+ that are automatically appended into policy at "learning mode".
+ Some programs access thousands of objects, so running
+ such programs in "learning mode" dulls the system response
+ and consumes much memory.
+ This is the safeguard for such programs.
+
+config SECURITY_TOMOYO_MAX_AUDIT_LOG
+ int "Default maximal count for audit log"
+ default 1024
+ range 0 2147483647
+ depends on SECURITY_TOMOYO
+ help
+ This is the default value for maximal entries for
+ audit logs that the kernel can hold on memory.
+ You can read the log via /sys/kernel/security/tomoyo/audit.
+ If you don't need audit logs, you may set this value to 0.
+
+config SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+ bool "Activate without calling userspace policy loader."
+ default n
+ depends on SECURITY_TOMOYO
+ help
+ Say Y here if you want to activate access control as soon as built-in
+ policy was loaded. This option will be useful for systems where
+ operations which can lead to the hijacking of the boot sequence are
+ needed before loading the policy. For example, you can activate
+ immediately after loading the fixed part of policy which will allow
+ only operations needed for mounting a partition which contains the
+ variant part of policy and verifying (e.g. running GPG check) and
+ loading the variant part of policy. Since you can start using
+ enforcing mode from the beginning, you can reduce the possibility of
+ hijacking the boot sequence.
+
+config SECURITY_TOMOYO_POLICY_LOADER
+ string "Location of userspace policy loader"
+ default "/sbin/tomoyo-init"
+ depends on SECURITY_TOMOYO
+ depends on !SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+ help
+ This is the default pathname of policy loader which is called before
+ activation. You can override this setting via TOMOYO_loader= kernel
+ command line option.
+
+config SECURITY_TOMOYO_ACTIVATION_TRIGGER
+ string "Trigger for calling userspace policy loader"
+ default "/sbin/init"
+ depends on SECURITY_TOMOYO
+ depends on !SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+ help
+ This is the default pathname of activation trigger.
+ You can override this setting via TOMOYO_trigger= kernel command line
+ option. For example, if you pass init=/bin/systemd option, you may
+ want to also pass TOMOYO_trigger=/bin/systemd option.
+
+config SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING
+ bool "Use insecure built-in settings for fuzzing tests."
+ default n
+ depends on SECURITY_TOMOYO
+ select SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+ help
+ Enabling this option forces minimal built-in policy and disables
+ domain/program checks for run-time policy modifications. Please enable
+ this option only if this kernel is built for doing fuzzing tests.
diff --git a/security/tomoyo/Makefile b/security/tomoyo/Makefile
new file mode 100644
index 000000000..221eaadff
--- /dev/null
+++ b/security/tomoyo/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-y = audit.o common.o condition.o domain.o environ.o file.o gc.o group.o load_policy.o memory.o mount.o network.o realpath.o securityfs_if.o tomoyo.o util.o
+
+targets += builtin-policy.h
+define do_policy
+echo "static char tomoyo_builtin_$(1)[] __initdata ="; \
+$(objtree)/scripts/bin2c <$(firstword $(wildcard $(obj)/policy/$(1).conf $(srctree)/$(src)/policy/$(1).conf.default) /dev/null); \
+echo ";"
+endef
+quiet_cmd_policy = POLICY $@
+ cmd_policy = ($(call do_policy,profile); $(call do_policy,exception_policy); $(call do_policy,domain_policy); $(call do_policy,manager); $(call do_policy,stat)) >$@
+
+$(obj)/builtin-policy.h: $(wildcard $(obj)/policy/*.conf $(srctree)/$(src)/policy/*.conf.default) FORCE
+ $(call if_changed,policy)
+
+$(obj)/common.o: $(obj)/builtin-policy.h
diff --git a/security/tomoyo/audit.c b/security/tomoyo/audit.c
new file mode 100644
index 000000000..3c96e8402
--- /dev/null
+++ b/security/tomoyo/audit.c
@@ -0,0 +1,478 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/audit.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+#include <linux/slab.h>
+
+/**
+ * tomoyo_print_bprm - Print "struct linux_binprm" for auditing.
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ * @dump: Pointer to "struct tomoyo_page_dump".
+ *
+ * Returns the contents of @bprm on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+static char *tomoyo_print_bprm(struct linux_binprm *bprm,
+ struct tomoyo_page_dump *dump)
+{
+ static const int tomoyo_buffer_len = 4096 * 2;
+ char *buffer = kzalloc(tomoyo_buffer_len, GFP_NOFS);
+ char *cp;
+ char *last_start;
+ int len;
+ unsigned long pos = bprm->p;
+ int offset = pos % PAGE_SIZE;
+ int argv_count = bprm->argc;
+ int envp_count = bprm->envc;
+ bool truncated = false;
+
+ if (!buffer)
+ return NULL;
+ len = snprintf(buffer, tomoyo_buffer_len - 1, "argv[]={ ");
+ cp = buffer + len;
+ if (!argv_count) {
+ memmove(cp, "} envp[]={ ", 11);
+ cp += 11;
+ }
+ last_start = cp;
+ while (argv_count || envp_count) {
+ if (!tomoyo_dump_page(bprm, pos, dump))
+ goto out;
+ pos += PAGE_SIZE - offset;
+ /* Read. */
+ while (offset < PAGE_SIZE) {
+ const char *kaddr = dump->data;
+ const unsigned char c = kaddr[offset++];
+
+ if (cp == last_start)
+ *cp++ = '"';
+ if (cp >= buffer + tomoyo_buffer_len - 32) {
+ /* Reserve some room for "..." string. */
+ truncated = true;
+ } else if (c == '\\') {
+ *cp++ = '\\';
+ *cp++ = '\\';
+ } else if (c > ' ' && c < 127) {
+ *cp++ = c;
+ } else if (!c) {
+ *cp++ = '"';
+ *cp++ = ' ';
+ last_start = cp;
+ } else {
+ *cp++ = '\\';
+ *cp++ = (c >> 6) + '0';
+ *cp++ = ((c >> 3) & 7) + '0';
+ *cp++ = (c & 7) + '0';
+ }
+ if (c)
+ continue;
+ if (argv_count) {
+ if (--argv_count == 0) {
+ if (truncated) {
+ cp = last_start;
+ memmove(cp, "... ", 4);
+ cp += 4;
+ }
+ memmove(cp, "} envp[]={ ", 11);
+ cp += 11;
+ last_start = cp;
+ truncated = false;
+ }
+ } else if (envp_count) {
+ if (--envp_count == 0) {
+ if (truncated) {
+ cp = last_start;
+ memmove(cp, "... ", 4);
+ cp += 4;
+ }
+ }
+ }
+ if (!argv_count && !envp_count)
+ break;
+ }
+ offset = 0;
+ }
+ *cp++ = '}';
+ *cp = '\0';
+ return buffer;
+out:
+ snprintf(buffer, tomoyo_buffer_len - 1,
+ "argv[]={ ... } envp[]= { ... }");
+ return buffer;
+}
+
+/**
+ * tomoyo_filetype - Get string representation of file type.
+ *
+ * @mode: Mode value for stat().
+ *
+ * Returns file type string.
+ */
+static inline const char *tomoyo_filetype(const umode_t mode)
+{
+ switch (mode & S_IFMT) {
+ case S_IFREG:
+ case 0:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_FILE];
+ case S_IFDIR:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_DIRECTORY];
+ case S_IFLNK:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_SYMLINK];
+ case S_IFIFO:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_FIFO];
+ case S_IFSOCK:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_SOCKET];
+ case S_IFBLK:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_BLOCK_DEV];
+ case S_IFCHR:
+ return tomoyo_condition_keyword[TOMOYO_TYPE_IS_CHAR_DEV];
+ }
+ return "unknown"; /* This should not happen. */
+}
+
+/**
+ * tomoyo_print_header - Get header line of audit log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns string representation.
+ *
+ * This function uses kmalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+static char *tomoyo_print_header(struct tomoyo_request_info *r)
+{
+ struct tomoyo_time stamp;
+ const pid_t gpid = task_pid_nr(current);
+ struct tomoyo_obj_info *obj = r->obj;
+ static const int tomoyo_buffer_len = 4096;
+ char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
+ int pos;
+ u8 i;
+
+ if (!buffer)
+ return NULL;
+
+ tomoyo_convert_time(ktime_get_real_seconds(), &stamp);
+
+ pos = snprintf(buffer, tomoyo_buffer_len - 1,
+ "#%04u/%02u/%02u %02u:%02u:%02u# profile=%u mode=%s granted=%s (global-pid=%u) task={ pid=%u ppid=%u uid=%u gid=%u euid=%u egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
+ stamp.year, stamp.month, stamp.day, stamp.hour,
+ stamp.min, stamp.sec, r->profile, tomoyo_mode[r->mode],
+ tomoyo_yesno(r->granted), gpid, tomoyo_sys_getpid(),
+ tomoyo_sys_getppid(),
+ from_kuid(&init_user_ns, current_uid()),
+ from_kgid(&init_user_ns, current_gid()),
+ from_kuid(&init_user_ns, current_euid()),
+ from_kgid(&init_user_ns, current_egid()),
+ from_kuid(&init_user_ns, current_suid()),
+ from_kgid(&init_user_ns, current_sgid()),
+ from_kuid(&init_user_ns, current_fsuid()),
+ from_kgid(&init_user_ns, current_fsgid()));
+ if (!obj)
+ goto no_obj_info;
+ if (!obj->validate_done) {
+ tomoyo_get_attributes(obj);
+ obj->validate_done = true;
+ }
+ for (i = 0; i < TOMOYO_MAX_PATH_STAT; i++) {
+ struct tomoyo_mini_stat *stat;
+ unsigned int dev;
+ umode_t mode;
+
+ if (!obj->stat_valid[i])
+ continue;
+ stat = &obj->stat[i];
+ dev = stat->dev;
+ mode = stat->mode;
+ if (i & 1) {
+ pos += snprintf(buffer + pos,
+ tomoyo_buffer_len - 1 - pos,
+ " path%u.parent={ uid=%u gid=%u ino=%lu perm=0%o }",
+ (i >> 1) + 1,
+ from_kuid(&init_user_ns, stat->uid),
+ from_kgid(&init_user_ns, stat->gid),
+ (unsigned long)stat->ino,
+ stat->mode & S_IALLUGO);
+ continue;
+ }
+ pos += snprintf(buffer + pos, tomoyo_buffer_len - 1 - pos,
+ " path%u={ uid=%u gid=%u ino=%lu major=%u minor=%u perm=0%o type=%s",
+ (i >> 1) + 1,
+ from_kuid(&init_user_ns, stat->uid),
+ from_kgid(&init_user_ns, stat->gid),
+ (unsigned long)stat->ino,
+ MAJOR(dev), MINOR(dev),
+ mode & S_IALLUGO, tomoyo_filetype(mode));
+ if (S_ISCHR(mode) || S_ISBLK(mode)) {
+ dev = stat->rdev;
+ pos += snprintf(buffer + pos,
+ tomoyo_buffer_len - 1 - pos,
+ " dev_major=%u dev_minor=%u",
+ MAJOR(dev), MINOR(dev));
+ }
+ pos += snprintf(buffer + pos, tomoyo_buffer_len - 1 - pos,
+ " }");
+ }
+no_obj_info:
+ if (pos < tomoyo_buffer_len - 1)
+ return buffer;
+ kfree(buffer);
+ return NULL;
+}
+
+/**
+ * tomoyo_init_log - Allocate buffer for audit logs.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @len: Buffer size needed for @fmt and @args.
+ * @fmt: The printf()'s format string.
+ * @args: va_list structure for @fmt.
+ *
+ * Returns pointer to allocated memory.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
+ va_list args)
+{
+ char *buf = NULL;
+ char *bprm_info = NULL;
+ const char *header = NULL;
+ char *realpath = NULL;
+ const char *symlink = NULL;
+ int pos;
+ const char *domainname = r->domain->domainname->name;
+
+ header = tomoyo_print_header(r);
+ if (!header)
+ return NULL;
+ /* +10 is for '\n' etc. and '\0'. */
+ len += strlen(domainname) + strlen(header) + 10;
+ if (r->ee) {
+ struct file *file = r->ee->bprm->file;
+
+ realpath = tomoyo_realpath_from_path(&file->f_path);
+ bprm_info = tomoyo_print_bprm(r->ee->bprm, &r->ee->dump);
+ if (!realpath || !bprm_info)
+ goto out;
+ /* +80 is for " exec={ realpath=\"%s\" argc=%d envc=%d %s }" */
+ len += strlen(realpath) + 80 + strlen(bprm_info);
+ } else if (r->obj && r->obj->symlink_target) {
+ symlink = r->obj->symlink_target->name;
+ /* +18 is for " symlink.target=\"%s\"" */
+ len += 18 + strlen(symlink);
+ }
+ len = tomoyo_round2(len);
+ buf = kzalloc(len, GFP_NOFS);
+ if (!buf)
+ goto out;
+ len--;
+ pos = snprintf(buf, len, "%s", header);
+ if (realpath) {
+ struct linux_binprm *bprm = r->ee->bprm;
+
+ pos += snprintf(buf + pos, len - pos,
+ " exec={ realpath=\"%s\" argc=%d envc=%d %s }",
+ realpath, bprm->argc, bprm->envc, bprm_info);
+ } else if (symlink)
+ pos += snprintf(buf + pos, len - pos, " symlink.target=\"%s\"",
+ symlink);
+ pos += snprintf(buf + pos, len - pos, "\n%s\n", domainname);
+ vsnprintf(buf + pos, len - pos, fmt, args);
+out:
+ kfree(realpath);
+ kfree(bprm_info);
+ kfree(header);
+ return buf;
+}
+
+/* Wait queue for /sys/kernel/security/tomoyo/audit. */
+static DECLARE_WAIT_QUEUE_HEAD(tomoyo_log_wait);
+
+/* Structure for audit log. */
+struct tomoyo_log {
+ struct list_head list;
+ char *log;
+ int size;
+};
+
+/* The list for "struct tomoyo_log". */
+static LIST_HEAD(tomoyo_log);
+
+/* Lock for "struct list_head tomoyo_log". */
+static DEFINE_SPINLOCK(tomoyo_log_lock);
+
+/* Length of "stuct list_head tomoyo_log". */
+static unsigned int tomoyo_log_count;
+
+/**
+ * tomoyo_get_audit - Get audit mode.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @profile: Profile number.
+ * @index: Index number of functionality.
+ * @is_granted: True if granted log, false otherwise.
+ *
+ * Returns true if this request should be audited, false otherwise.
+ */
+static bool tomoyo_get_audit(const struct tomoyo_policy_namespace *ns,
+ const u8 profile, const u8 index,
+ const struct tomoyo_acl_info *matched_acl,
+ const bool is_granted)
+{
+ u8 mode;
+ const u8 category = tomoyo_index2category[index] +
+ TOMOYO_MAX_MAC_INDEX;
+ struct tomoyo_profile *p;
+
+ if (!tomoyo_policy_loaded)
+ return false;
+ p = tomoyo_profile(ns, profile);
+ if (tomoyo_log_count >= p->pref[TOMOYO_PREF_MAX_AUDIT_LOG])
+ return false;
+ if (is_granted && matched_acl && matched_acl->cond &&
+ matched_acl->cond->grant_log != TOMOYO_GRANTLOG_AUTO)
+ return matched_acl->cond->grant_log == TOMOYO_GRANTLOG_YES;
+ mode = p->config[index];
+ if (mode == TOMOYO_CONFIG_USE_DEFAULT)
+ mode = p->config[category];
+ if (mode == TOMOYO_CONFIG_USE_DEFAULT)
+ mode = p->default_config;
+ if (is_granted)
+ return mode & TOMOYO_CONFIG_WANT_GRANT_LOG;
+ return mode & TOMOYO_CONFIG_WANT_REJECT_LOG;
+}
+
+/**
+ * tomoyo_write_log2 - Write an audit log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @len: Buffer size needed for @fmt and @args.
+ * @fmt: The printf()'s format string.
+ * @args: va_list structure for @fmt.
+ *
+ * Returns nothing.
+ */
+void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
+ va_list args)
+{
+ char *buf;
+ struct tomoyo_log *entry;
+ bool quota_exceeded = false;
+
+ if (!tomoyo_get_audit(r->domain->ns, r->profile, r->type,
+ r->matched_acl, r->granted))
+ goto out;
+ buf = tomoyo_init_log(r, len, fmt, args);
+ if (!buf)
+ goto out;
+ entry = kzalloc(sizeof(*entry), GFP_NOFS);
+ if (!entry) {
+ kfree(buf);
+ goto out;
+ }
+ entry->log = buf;
+ len = tomoyo_round2(strlen(buf) + 1);
+ /*
+ * The entry->size is used for memory quota checks.
+ * Don't go beyond strlen(entry->log).
+ */
+ entry->size = len + tomoyo_round2(sizeof(*entry));
+ spin_lock(&tomoyo_log_lock);
+ if (tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT] &&
+ tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] + entry->size >=
+ tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT]) {
+ quota_exceeded = true;
+ } else {
+ tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] += entry->size;
+ list_add_tail(&entry->list, &tomoyo_log);
+ tomoyo_log_count++;
+ }
+ spin_unlock(&tomoyo_log_lock);
+ if (quota_exceeded) {
+ kfree(buf);
+ kfree(entry);
+ goto out;
+ }
+ wake_up(&tomoyo_log_wait);
+out:
+ return;
+}
+
+/**
+ * tomoyo_write_log - Write an audit log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @fmt: The printf()'s format string, followed by parameters.
+ *
+ * Returns nothing.
+ */
+void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
+{
+ va_list args;
+ int len;
+
+ va_start(args, fmt);
+ len = vsnprintf((char *) &len, 1, fmt, args) + 1;
+ va_end(args);
+ va_start(args, fmt);
+ tomoyo_write_log2(r, len, fmt, args);
+ va_end(args);
+}
+
+/**
+ * tomoyo_read_log - Read an audit log.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+void tomoyo_read_log(struct tomoyo_io_buffer *head)
+{
+ struct tomoyo_log *ptr = NULL;
+
+ if (head->r.w_pos)
+ return;
+ kfree(head->read_buf);
+ head->read_buf = NULL;
+ spin_lock(&tomoyo_log_lock);
+ if (!list_empty(&tomoyo_log)) {
+ ptr = list_entry(tomoyo_log.next, typeof(*ptr), list);
+ list_del(&ptr->list);
+ tomoyo_log_count--;
+ tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] -= ptr->size;
+ }
+ spin_unlock(&tomoyo_log_lock);
+ if (ptr) {
+ head->read_buf = ptr->log;
+ head->r.w[head->r.w_pos++] = head->read_buf;
+ kfree(ptr);
+ }
+}
+
+/**
+ * tomoyo_poll_log - Wait for an audit log.
+ *
+ * @file: Pointer to "struct file".
+ * @wait: Pointer to "poll_table". Maybe NULL.
+ *
+ * Returns EPOLLIN | EPOLLRDNORM when ready to read an audit log.
+ */
+__poll_t tomoyo_poll_log(struct file *file, poll_table *wait)
+{
+ if (tomoyo_log_count)
+ return EPOLLIN | EPOLLRDNORM;
+ poll_wait(file, &tomoyo_log_wait, wait);
+ if (tomoyo_log_count)
+ return EPOLLIN | EPOLLRDNORM;
+ return 0;
+}
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
new file mode 100644
index 000000000..4bee32bfe
--- /dev/null
+++ b/security/tomoyo/common.c
@@ -0,0 +1,2879 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/common.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <linux/security.h>
+#include "common.h"
+
+/* String table for operation mode. */
+const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = {
+ [TOMOYO_CONFIG_DISABLED] = "disabled",
+ [TOMOYO_CONFIG_LEARNING] = "learning",
+ [TOMOYO_CONFIG_PERMISSIVE] = "permissive",
+ [TOMOYO_CONFIG_ENFORCING] = "enforcing"
+};
+
+/* String table for /sys/kernel/security/tomoyo/profile */
+const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
+ /* CONFIG::file group */
+ [TOMOYO_MAC_FILE_EXECUTE] = "execute",
+ [TOMOYO_MAC_FILE_OPEN] = "open",
+ [TOMOYO_MAC_FILE_CREATE] = "create",
+ [TOMOYO_MAC_FILE_UNLINK] = "unlink",
+ [TOMOYO_MAC_FILE_GETATTR] = "getattr",
+ [TOMOYO_MAC_FILE_MKDIR] = "mkdir",
+ [TOMOYO_MAC_FILE_RMDIR] = "rmdir",
+ [TOMOYO_MAC_FILE_MKFIFO] = "mkfifo",
+ [TOMOYO_MAC_FILE_MKSOCK] = "mksock",
+ [TOMOYO_MAC_FILE_TRUNCATE] = "truncate",
+ [TOMOYO_MAC_FILE_SYMLINK] = "symlink",
+ [TOMOYO_MAC_FILE_MKBLOCK] = "mkblock",
+ [TOMOYO_MAC_FILE_MKCHAR] = "mkchar",
+ [TOMOYO_MAC_FILE_LINK] = "link",
+ [TOMOYO_MAC_FILE_RENAME] = "rename",
+ [TOMOYO_MAC_FILE_CHMOD] = "chmod",
+ [TOMOYO_MAC_FILE_CHOWN] = "chown",
+ [TOMOYO_MAC_FILE_CHGRP] = "chgrp",
+ [TOMOYO_MAC_FILE_IOCTL] = "ioctl",
+ [TOMOYO_MAC_FILE_CHROOT] = "chroot",
+ [TOMOYO_MAC_FILE_MOUNT] = "mount",
+ [TOMOYO_MAC_FILE_UMOUNT] = "unmount",
+ [TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root",
+ /* CONFIG::network group */
+ [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind",
+ [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen",
+ [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect",
+ [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind",
+ [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send",
+ [TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind",
+ [TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send",
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind",
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen",
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect",
+ [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind",
+ [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send",
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind",
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen",
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect",
+ /* CONFIG::misc group */
+ [TOMOYO_MAC_ENVIRON] = "env",
+ /* CONFIG group */
+ [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
+ [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network",
+ [TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc",
+};
+
+/* String table for conditions. */
+const char * const tomoyo_condition_keyword[TOMOYO_MAX_CONDITION_KEYWORD] = {
+ [TOMOYO_TASK_UID] = "task.uid",
+ [TOMOYO_TASK_EUID] = "task.euid",
+ [TOMOYO_TASK_SUID] = "task.suid",
+ [TOMOYO_TASK_FSUID] = "task.fsuid",
+ [TOMOYO_TASK_GID] = "task.gid",
+ [TOMOYO_TASK_EGID] = "task.egid",
+ [TOMOYO_TASK_SGID] = "task.sgid",
+ [TOMOYO_TASK_FSGID] = "task.fsgid",
+ [TOMOYO_TASK_PID] = "task.pid",
+ [TOMOYO_TASK_PPID] = "task.ppid",
+ [TOMOYO_EXEC_ARGC] = "exec.argc",
+ [TOMOYO_EXEC_ENVC] = "exec.envc",
+ [TOMOYO_TYPE_IS_SOCKET] = "socket",
+ [TOMOYO_TYPE_IS_SYMLINK] = "symlink",
+ [TOMOYO_TYPE_IS_FILE] = "file",
+ [TOMOYO_TYPE_IS_BLOCK_DEV] = "block",
+ [TOMOYO_TYPE_IS_DIRECTORY] = "directory",
+ [TOMOYO_TYPE_IS_CHAR_DEV] = "char",
+ [TOMOYO_TYPE_IS_FIFO] = "fifo",
+ [TOMOYO_MODE_SETUID] = "setuid",
+ [TOMOYO_MODE_SETGID] = "setgid",
+ [TOMOYO_MODE_STICKY] = "sticky",
+ [TOMOYO_MODE_OWNER_READ] = "owner_read",
+ [TOMOYO_MODE_OWNER_WRITE] = "owner_write",
+ [TOMOYO_MODE_OWNER_EXECUTE] = "owner_execute",
+ [TOMOYO_MODE_GROUP_READ] = "group_read",
+ [TOMOYO_MODE_GROUP_WRITE] = "group_write",
+ [TOMOYO_MODE_GROUP_EXECUTE] = "group_execute",
+ [TOMOYO_MODE_OTHERS_READ] = "others_read",
+ [TOMOYO_MODE_OTHERS_WRITE] = "others_write",
+ [TOMOYO_MODE_OTHERS_EXECUTE] = "others_execute",
+ [TOMOYO_EXEC_REALPATH] = "exec.realpath",
+ [TOMOYO_SYMLINK_TARGET] = "symlink.target",
+ [TOMOYO_PATH1_UID] = "path1.uid",
+ [TOMOYO_PATH1_GID] = "path1.gid",
+ [TOMOYO_PATH1_INO] = "path1.ino",
+ [TOMOYO_PATH1_MAJOR] = "path1.major",
+ [TOMOYO_PATH1_MINOR] = "path1.minor",
+ [TOMOYO_PATH1_PERM] = "path1.perm",
+ [TOMOYO_PATH1_TYPE] = "path1.type",
+ [TOMOYO_PATH1_DEV_MAJOR] = "path1.dev_major",
+ [TOMOYO_PATH1_DEV_MINOR] = "path1.dev_minor",
+ [TOMOYO_PATH2_UID] = "path2.uid",
+ [TOMOYO_PATH2_GID] = "path2.gid",
+ [TOMOYO_PATH2_INO] = "path2.ino",
+ [TOMOYO_PATH2_MAJOR] = "path2.major",
+ [TOMOYO_PATH2_MINOR] = "path2.minor",
+ [TOMOYO_PATH2_PERM] = "path2.perm",
+ [TOMOYO_PATH2_TYPE] = "path2.type",
+ [TOMOYO_PATH2_DEV_MAJOR] = "path2.dev_major",
+ [TOMOYO_PATH2_DEV_MINOR] = "path2.dev_minor",
+ [TOMOYO_PATH1_PARENT_UID] = "path1.parent.uid",
+ [TOMOYO_PATH1_PARENT_GID] = "path1.parent.gid",
+ [TOMOYO_PATH1_PARENT_INO] = "path1.parent.ino",
+ [TOMOYO_PATH1_PARENT_PERM] = "path1.parent.perm",
+ [TOMOYO_PATH2_PARENT_UID] = "path2.parent.uid",
+ [TOMOYO_PATH2_PARENT_GID] = "path2.parent.gid",
+ [TOMOYO_PATH2_PARENT_INO] = "path2.parent.ino",
+ [TOMOYO_PATH2_PARENT_PERM] = "path2.parent.perm",
+};
+
+/* String table for PREFERENCE keyword. */
+static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = {
+ [TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log",
+ [TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
+};
+
+/* String table for path operation. */
+const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
+ [TOMOYO_TYPE_EXECUTE] = "execute",
+ [TOMOYO_TYPE_READ] = "read",
+ [TOMOYO_TYPE_WRITE] = "write",
+ [TOMOYO_TYPE_APPEND] = "append",
+ [TOMOYO_TYPE_UNLINK] = "unlink",
+ [TOMOYO_TYPE_GETATTR] = "getattr",
+ [TOMOYO_TYPE_RMDIR] = "rmdir",
+ [TOMOYO_TYPE_TRUNCATE] = "truncate",
+ [TOMOYO_TYPE_SYMLINK] = "symlink",
+ [TOMOYO_TYPE_CHROOT] = "chroot",
+ [TOMOYO_TYPE_UMOUNT] = "unmount",
+};
+
+/* String table for socket's operation. */
+const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = {
+ [TOMOYO_NETWORK_BIND] = "bind",
+ [TOMOYO_NETWORK_LISTEN] = "listen",
+ [TOMOYO_NETWORK_CONNECT] = "connect",
+ [TOMOYO_NETWORK_SEND] = "send",
+};
+
+/* String table for categories. */
+static const char * const tomoyo_category_keywords
+[TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
+ [TOMOYO_MAC_CATEGORY_FILE] = "file",
+ [TOMOYO_MAC_CATEGORY_NETWORK] = "network",
+ [TOMOYO_MAC_CATEGORY_MISC] = "misc",
+};
+
+/* Permit policy management by non-root user? */
+static bool tomoyo_manage_by_non_root;
+
+/* Utility functions. */
+
+/**
+ * tomoyo_yesno - Return "yes" or "no".
+ *
+ * @value: Bool value.
+ */
+const char *tomoyo_yesno(const unsigned int value)
+{
+ return value ? "yes" : "no";
+}
+
+/**
+ * tomoyo_addprintf - strncat()-like-snprintf().
+ *
+ * @buffer: Buffer to write to. Must be '\0'-terminated.
+ * @len: Size of @buffer.
+ * @fmt: The printf()'s format string, followed by parameters.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_addprintf(char *buffer, int len, const char *fmt, ...)
+{
+ va_list args;
+ const int pos = strlen(buffer);
+
+ va_start(args, fmt);
+ vsnprintf(buffer + pos, len - pos - 1, fmt, args);
+ va_end(args);
+}
+
+/**
+ * tomoyo_flush - Flush queued string to userspace's buffer.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true if all data was flushed, false otherwise.
+ */
+static bool tomoyo_flush(struct tomoyo_io_buffer *head)
+{
+ while (head->r.w_pos) {
+ const char *w = head->r.w[0];
+ size_t len = strlen(w);
+
+ if (len) {
+ if (len > head->read_user_buf_avail)
+ len = head->read_user_buf_avail;
+ if (!len)
+ return false;
+ if (copy_to_user(head->read_user_buf, w, len))
+ return false;
+ head->read_user_buf_avail -= len;
+ head->read_user_buf += len;
+ w += len;
+ }
+ head->r.w[0] = w;
+ if (*w)
+ return false;
+ /* Add '\0' for audit logs and query. */
+ if (head->poll) {
+ if (!head->read_user_buf_avail ||
+ copy_to_user(head->read_user_buf, "", 1))
+ return false;
+ head->read_user_buf_avail--;
+ head->read_user_buf++;
+ }
+ head->r.w_pos--;
+ for (len = 0; len < head->r.w_pos; len++)
+ head->r.w[len] = head->r.w[len + 1];
+ }
+ head->r.avail = 0;
+ return true;
+}
+
+/**
+ * tomoyo_set_string - Queue string to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @string: String to print.
+ *
+ * Note that @string has to be kept valid until @head is kfree()d.
+ * This means that char[] allocated on stack memory cannot be passed to
+ * this function. Use tomoyo_io_printf() for char[] allocated on stack memory.
+ */
+static void tomoyo_set_string(struct tomoyo_io_buffer *head, const char *string)
+{
+ if (head->r.w_pos < TOMOYO_MAX_IO_READ_QUEUE) {
+ head->r.w[head->r.w_pos++] = string;
+ tomoyo_flush(head);
+ } else
+ WARN_ON(1);
+}
+
+static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
+ ...) __printf(2, 3);
+
+/**
+ * tomoyo_io_printf - printf() to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @fmt: The printf()'s format string, followed by parameters.
+ */
+static void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt,
+ ...)
+{
+ va_list args;
+ size_t len;
+ size_t pos = head->r.avail;
+ int size = head->readbuf_size - pos;
+
+ if (size <= 0)
+ return;
+ va_start(args, fmt);
+ len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
+ va_end(args);
+ if (pos + len >= head->readbuf_size) {
+ WARN_ON(1);
+ return;
+ }
+ head->r.avail += len;
+ tomoyo_set_string(head, head->read_buf + pos);
+}
+
+/**
+ * tomoyo_set_space - Put a space to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_set_space(struct tomoyo_io_buffer *head)
+{
+ tomoyo_set_string(head, " ");
+}
+
+/**
+ * tomoyo_set_lf - Put a line feed to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static bool tomoyo_set_lf(struct tomoyo_io_buffer *head)
+{
+ tomoyo_set_string(head, "\n");
+ return !head->r.w_pos;
+}
+
+/**
+ * tomoyo_set_slash - Put a shash to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_set_slash(struct tomoyo_io_buffer *head)
+{
+ tomoyo_set_string(head, "/");
+}
+
+/* List of namespaces. */
+LIST_HEAD(tomoyo_namespace_list);
+/* True if namespace other than tomoyo_kernel_namespace is defined. */
+static bool tomoyo_namespace_enabled;
+
+/**
+ * tomoyo_init_policy_namespace - Initialize namespace.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ *
+ * Returns nothing.
+ */
+void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns)
+{
+ unsigned int idx;
+
+ for (idx = 0; idx < TOMOYO_MAX_ACL_GROUPS; idx++)
+ INIT_LIST_HEAD(&ns->acl_group[idx]);
+ for (idx = 0; idx < TOMOYO_MAX_GROUP; idx++)
+ INIT_LIST_HEAD(&ns->group_list[idx]);
+ for (idx = 0; idx < TOMOYO_MAX_POLICY; idx++)
+ INIT_LIST_HEAD(&ns->policy_list[idx]);
+ ns->profile_version = 20150505;
+ tomoyo_namespace_enabled = !list_empty(&tomoyo_namespace_list);
+ list_add_tail_rcu(&ns->namespace_list, &tomoyo_namespace_list);
+}
+
+/**
+ * tomoyo_print_namespace - Print namespace header.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_namespace(struct tomoyo_io_buffer *head)
+{
+ if (!tomoyo_namespace_enabled)
+ return;
+ tomoyo_set_string(head,
+ container_of(head->r.ns,
+ struct tomoyo_policy_namespace,
+ namespace_list)->name);
+ tomoyo_set_space(head);
+}
+
+/**
+ * tomoyo_print_name_union - Print a tomoyo_name_union.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ */
+static void tomoyo_print_name_union(struct tomoyo_io_buffer *head,
+ const struct tomoyo_name_union *ptr)
+{
+ tomoyo_set_space(head);
+ if (ptr->group) {
+ tomoyo_set_string(head, "@");
+ tomoyo_set_string(head, ptr->group->group_name->name);
+ } else {
+ tomoyo_set_string(head, ptr->filename->name);
+ }
+}
+
+/**
+ * tomoyo_print_name_union_quoted - Print a tomoyo_name_union with a quote.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_name_union_quoted(struct tomoyo_io_buffer *head,
+ const struct tomoyo_name_union *ptr)
+{
+ if (ptr->group) {
+ tomoyo_set_string(head, "@");
+ tomoyo_set_string(head, ptr->group->group_name->name);
+ } else {
+ tomoyo_set_string(head, "\"");
+ tomoyo_set_string(head, ptr->filename->name);
+ tomoyo_set_string(head, "\"");
+ }
+}
+
+/**
+ * tomoyo_print_number_union_nospace - Print a tomoyo_number_union without a space.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_number_union".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_number_union_nospace
+(struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr)
+{
+ if (ptr->group) {
+ tomoyo_set_string(head, "@");
+ tomoyo_set_string(head, ptr->group->group_name->name);
+ } else {
+ int i;
+ unsigned long min = ptr->values[0];
+ const unsigned long max = ptr->values[1];
+ u8 min_type = ptr->value_type[0];
+ const u8 max_type = ptr->value_type[1];
+ char buffer[128];
+
+ buffer[0] = '\0';
+ for (i = 0; i < 2; i++) {
+ switch (min_type) {
+ case TOMOYO_VALUE_TYPE_HEXADECIMAL:
+ tomoyo_addprintf(buffer, sizeof(buffer),
+ "0x%lX", min);
+ break;
+ case TOMOYO_VALUE_TYPE_OCTAL:
+ tomoyo_addprintf(buffer, sizeof(buffer),
+ "0%lo", min);
+ break;
+ default:
+ tomoyo_addprintf(buffer, sizeof(buffer), "%lu",
+ min);
+ break;
+ }
+ if (min == max && min_type == max_type)
+ break;
+ tomoyo_addprintf(buffer, sizeof(buffer), "-");
+ min_type = max_type;
+ min = max;
+ }
+ tomoyo_io_printf(head, "%s", buffer);
+ }
+}
+
+/**
+ * tomoyo_print_number_union - Print a tomoyo_number_union.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_number_union".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_number_union(struct tomoyo_io_buffer *head,
+ const struct tomoyo_number_union *ptr)
+{
+ tomoyo_set_space(head);
+ tomoyo_print_number_union_nospace(head, ptr);
+}
+
+/**
+ * tomoyo_assign_profile - Create a new profile.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @profile: Profile number to create.
+ *
+ * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
+ */
+static struct tomoyo_profile *tomoyo_assign_profile
+(struct tomoyo_policy_namespace *ns, const unsigned int profile)
+{
+ struct tomoyo_profile *ptr;
+ struct tomoyo_profile *entry;
+
+ if (profile >= TOMOYO_MAX_PROFILES)
+ return NULL;
+ ptr = ns->profile_ptr[profile];
+ if (ptr)
+ return ptr;
+ entry = kzalloc(sizeof(*entry), GFP_NOFS);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ ptr = ns->profile_ptr[profile];
+ if (!ptr && tomoyo_memory_ok(entry)) {
+ ptr = entry;
+ ptr->default_config = TOMOYO_CONFIG_DISABLED |
+ TOMOYO_CONFIG_WANT_GRANT_LOG |
+ TOMOYO_CONFIG_WANT_REJECT_LOG;
+ memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
+ sizeof(ptr->config));
+ ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] =
+ CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG;
+ ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] =
+ CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY;
+ mb(); /* Avoid out-of-order execution. */
+ ns->profile_ptr[profile] = ptr;
+ entry = NULL;
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ out:
+ kfree(entry);
+ return ptr;
+}
+
+/**
+ * tomoyo_profile - Find a profile.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @profile: Profile number to find.
+ *
+ * Returns pointer to "struct tomoyo_profile".
+ */
+struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
+ const u8 profile)
+{
+ static struct tomoyo_profile tomoyo_null_profile;
+ struct tomoyo_profile *ptr = ns->profile_ptr[profile];
+
+ if (!ptr)
+ ptr = &tomoyo_null_profile;
+ return ptr;
+}
+
+/**
+ * tomoyo_find_yesno - Find values for specified keyword.
+ *
+ * @string: String to check.
+ * @find: Name of keyword.
+ *
+ * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
+ */
+static s8 tomoyo_find_yesno(const char *string, const char *find)
+{
+ const char *cp = strstr(string, find);
+
+ if (cp) {
+ cp += strlen(find);
+ if (!strncmp(cp, "=yes", 4))
+ return 1;
+ else if (!strncmp(cp, "=no", 3))
+ return 0;
+ }
+ return -1;
+}
+
+/**
+ * tomoyo_set_uint - Set value for specified preference.
+ *
+ * @i: Pointer to "unsigned int".
+ * @string: String to check.
+ * @find: Name of keyword.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_set_uint(unsigned int *i, const char *string,
+ const char *find)
+{
+ const char *cp = strstr(string, find);
+
+ if (cp)
+ sscanf(cp + strlen(find), "=%u", i);
+}
+
+/**
+ * tomoyo_set_mode - Set mode for specified profile.
+ *
+ * @name: Name of functionality.
+ * @value: Mode for @name.
+ * @profile: Pointer to "struct tomoyo_profile".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_set_mode(char *name, const char *value,
+ struct tomoyo_profile *profile)
+{
+ u8 i;
+ u8 config;
+
+ if (!strcmp(name, "CONFIG")) {
+ i = TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX;
+ config = profile->default_config;
+ } else if (tomoyo_str_starts(&name, "CONFIG::")) {
+ config = 0;
+ for (i = 0; i < TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX; i++) {
+ int len = 0;
+
+ if (i < TOMOYO_MAX_MAC_INDEX) {
+ const u8 c = tomoyo_index2category[i];
+ const char *category =
+ tomoyo_category_keywords[c];
+
+ len = strlen(category);
+ if (strncmp(name, category, len) ||
+ name[len++] != ':' || name[len++] != ':')
+ continue;
+ }
+ if (strcmp(name + len, tomoyo_mac_keywords[i]))
+ continue;
+ config = profile->config[i];
+ break;
+ }
+ if (i == TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
+ return -EINVAL;
+ } else {
+ return -EINVAL;
+ }
+ if (strstr(value, "use_default")) {
+ config = TOMOYO_CONFIG_USE_DEFAULT;
+ } else {
+ u8 mode;
+
+ for (mode = 0; mode < 4; mode++)
+ if (strstr(value, tomoyo_mode[mode]))
+ /*
+ * Update lower 3 bits in order to distinguish
+ * 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
+ */
+ config = (config & ~7) | mode;
+ if (config != TOMOYO_CONFIG_USE_DEFAULT) {
+ switch (tomoyo_find_yesno(value, "grant_log")) {
+ case 1:
+ config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
+ break;
+ case 0:
+ config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
+ break;
+ }
+ switch (tomoyo_find_yesno(value, "reject_log")) {
+ case 1:
+ config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
+ break;
+ case 0:
+ config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
+ break;
+ }
+ }
+ }
+ if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
+ profile->config[i] = config;
+ else if (config != TOMOYO_CONFIG_USE_DEFAULT)
+ profile->default_config = config;
+ return 0;
+}
+
+/**
+ * tomoyo_write_profile - Write profile table.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ unsigned int i;
+ char *cp;
+ struct tomoyo_profile *profile;
+
+ if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
+ == 1)
+ return 0;
+ i = simple_strtoul(data, &cp, 10);
+ if (*cp != '-')
+ return -EINVAL;
+ data = cp + 1;
+ profile = tomoyo_assign_profile(head->w.ns, i);
+ if (!profile)
+ return -EINVAL;
+ cp = strchr(data, '=');
+ if (!cp)
+ return -EINVAL;
+ *cp++ = '\0';
+ if (!strcmp(data, "COMMENT")) {
+ static DEFINE_SPINLOCK(lock);
+ const struct tomoyo_path_info *new_comment
+ = tomoyo_get_name(cp);
+ const struct tomoyo_path_info *old_comment;
+
+ if (!new_comment)
+ return -ENOMEM;
+ spin_lock(&lock);
+ old_comment = profile->comment;
+ profile->comment = new_comment;
+ spin_unlock(&lock);
+ tomoyo_put_name(old_comment);
+ return 0;
+ }
+ if (!strcmp(data, "PREFERENCE")) {
+ for (i = 0; i < TOMOYO_MAX_PREF; i++)
+ tomoyo_set_uint(&profile->pref[i], cp,
+ tomoyo_pref_keywords[i]);
+ return 0;
+ }
+ return tomoyo_set_mode(data, cp, profile);
+}
+
+/**
+ * tomoyo_print_config - Print mode for specified functionality.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @config: Mode for that functionality.
+ *
+ * Returns nothing.
+ *
+ * Caller prints functionality's name.
+ */
+static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
+{
+ tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
+ tomoyo_mode[config & 3],
+ tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
+ tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
+}
+
+/**
+ * tomoyo_read_profile - Read profile table.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
+{
+ u8 index;
+ struct tomoyo_policy_namespace *ns =
+ container_of(head->r.ns, typeof(*ns), namespace_list);
+ const struct tomoyo_profile *profile;
+
+ if (head->r.eof)
+ return;
+ next:
+ index = head->r.index;
+ profile = ns->profile_ptr[index];
+ switch (head->r.step) {
+ case 0:
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "PROFILE_VERSION=%u\n",
+ ns->profile_version);
+ head->r.step++;
+ break;
+ case 1:
+ for ( ; head->r.index < TOMOYO_MAX_PROFILES;
+ head->r.index++)
+ if (ns->profile_ptr[head->r.index])
+ break;
+ if (head->r.index == TOMOYO_MAX_PROFILES) {
+ head->r.eof = true;
+ return;
+ }
+ head->r.step++;
+ break;
+ case 2:
+ {
+ u8 i;
+ const struct tomoyo_path_info *comment =
+ profile->comment;
+
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "%u-COMMENT=", index);
+ tomoyo_set_string(head, comment ? comment->name : "");
+ tomoyo_set_lf(head);
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "%u-PREFERENCE={ ", index);
+ for (i = 0; i < TOMOYO_MAX_PREF; i++)
+ tomoyo_io_printf(head, "%s=%u ",
+ tomoyo_pref_keywords[i],
+ profile->pref[i]);
+ tomoyo_set_string(head, "}\n");
+ head->r.step++;
+ }
+ break;
+ case 3:
+ {
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "%u-%s", index, "CONFIG");
+ tomoyo_print_config(head, profile->default_config);
+ head->r.bit = 0;
+ head->r.step++;
+ }
+ break;
+ case 4:
+ for ( ; head->r.bit < TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
+ const u8 i = head->r.bit;
+ const u8 config = profile->config[i];
+
+ if (config == TOMOYO_CONFIG_USE_DEFAULT)
+ continue;
+ tomoyo_print_namespace(head);
+ if (i < TOMOYO_MAX_MAC_INDEX)
+ tomoyo_io_printf(head, "%u-CONFIG::%s::%s",
+ index,
+ tomoyo_category_keywords
+ [tomoyo_index2category[i]],
+ tomoyo_mac_keywords[i]);
+ else
+ tomoyo_io_printf(head, "%u-CONFIG::%s", index,
+ tomoyo_mac_keywords[i]);
+ tomoyo_print_config(head, config);
+ head->r.bit++;
+ break;
+ }
+ if (head->r.bit == TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX) {
+ head->r.index++;
+ head->r.step = 1;
+ }
+ break;
+ }
+ if (tomoyo_flush(head))
+ goto next;
+}
+
+/**
+ * tomoyo_same_manager - Check for duplicated "struct tomoyo_manager" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_head".
+ * @b: Pointer to "struct tomoyo_acl_head".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_manager(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ return container_of(a, struct tomoyo_manager, head)->manager ==
+ container_of(b, struct tomoyo_manager, head)->manager;
+}
+
+/**
+ * tomoyo_update_manager_entry - Add a manager entry.
+ *
+ * @manager: The path to manager or the domainnamme.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_update_manager_entry(const char *manager,
+ const bool is_delete)
+{
+ struct tomoyo_manager e = { };
+ struct tomoyo_acl_param param = {
+ /* .ns = &tomoyo_kernel_namespace, */
+ .is_delete = is_delete,
+ .list = &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER],
+ };
+ int error = is_delete ? -ENOENT : -ENOMEM;
+
+ if (!tomoyo_correct_domain(manager) &&
+ !tomoyo_correct_word(manager))
+ return -EINVAL;
+ e.manager = tomoyo_get_name(manager);
+ if (e.manager) {
+ error = tomoyo_update_policy(&e.head, sizeof(e), &param,
+ tomoyo_same_manager);
+ tomoyo_put_name(e.manager);
+ }
+ return error;
+}
+
+/**
+ * tomoyo_write_manager - Write manager policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_manager(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+
+ if (!strcmp(data, "manage_by_non_root")) {
+ tomoyo_manage_by_non_root = !head->w.is_delete;
+ return 0;
+ }
+ return tomoyo_update_manager_entry(data, head->w.is_delete);
+}
+
+/**
+ * tomoyo_read_manager - Read manager policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static void tomoyo_read_manager(struct tomoyo_io_buffer *head)
+{
+ if (head->r.eof)
+ return;
+ list_for_each_cookie(head->r.acl, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER]) {
+ struct tomoyo_manager *ptr =
+ list_entry(head->r.acl, typeof(*ptr), head.list);
+
+ if (ptr->head.is_deleted)
+ continue;
+ if (!tomoyo_flush(head))
+ return;
+ tomoyo_set_string(head, ptr->manager->name);
+ tomoyo_set_lf(head);
+ }
+ head->r.eof = true;
+}
+
+/**
+ * tomoyo_manager - Check whether the current process is a policy manager.
+ *
+ * Returns true if the current process is permitted to modify policy
+ * via /sys/kernel/security/tomoyo/ interface.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_manager(void)
+{
+ struct tomoyo_manager *ptr;
+ const char *exe;
+ const struct task_struct *task = current;
+ const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
+ bool found = IS_ENABLED(CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING);
+
+ if (!tomoyo_policy_loaded)
+ return true;
+ if (!tomoyo_manage_by_non_root &&
+ (!uid_eq(task->cred->uid, GLOBAL_ROOT_UID) ||
+ !uid_eq(task->cred->euid, GLOBAL_ROOT_UID)))
+ return false;
+ exe = tomoyo_get_exe();
+ if (!exe)
+ return false;
+ list_for_each_entry_rcu(ptr, &tomoyo_kernel_namespace.policy_list[TOMOYO_ID_MANAGER], head.list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (!ptr->head.is_deleted &&
+ (!tomoyo_pathcmp(domainname, ptr->manager) ||
+ !strcmp(exe, ptr->manager->name))) {
+ found = true;
+ break;
+ }
+ }
+ if (!found) { /* Reduce error messages. */
+ static pid_t last_pid;
+ const pid_t pid = current->pid;
+
+ if (last_pid != pid) {
+ pr_warn("%s ( %s ) is not permitted to update policies.\n",
+ domainname->name, exe);
+ last_pid = pid;
+ }
+ }
+ kfree(exe);
+ return found;
+}
+
+static struct tomoyo_domain_info *tomoyo_find_domain_by_qid
+(unsigned int serial);
+
+/**
+ * tomoyo_select_domain - Parse select command.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @data: String to parse.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_select_domain(struct tomoyo_io_buffer *head,
+ const char *data)
+{
+ unsigned int pid;
+ struct tomoyo_domain_info *domain = NULL;
+ bool global_pid = false;
+
+ if (strncmp(data, "select ", 7))
+ return false;
+ data += 7;
+ if (sscanf(data, "pid=%u", &pid) == 1 ||
+ (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
+ struct task_struct *p;
+
+ rcu_read_lock();
+ if (global_pid)
+ p = find_task_by_pid_ns(pid, &init_pid_ns);
+ else
+ p = find_task_by_vpid(pid);
+ if (p)
+ domain = tomoyo_task(p)->domain_info;
+ rcu_read_unlock();
+ } else if (!strncmp(data, "domain=", 7)) {
+ if (tomoyo_domain_def(data + 7))
+ domain = tomoyo_find_domain(data + 7);
+ } else if (sscanf(data, "Q=%u", &pid) == 1) {
+ domain = tomoyo_find_domain_by_qid(pid);
+ } else
+ return false;
+ head->w.domain = domain;
+ /* Accessing read_buf is safe because head->io_sem is held. */
+ if (!head->read_buf)
+ return true; /* Do nothing if open(O_WRONLY). */
+ memset(&head->r, 0, sizeof(head->r));
+ head->r.print_this_domain_only = true;
+ if (domain)
+ head->r.domain = &domain->list;
+ else
+ head->r.eof = true;
+ tomoyo_io_printf(head, "# select %s\n", data);
+ if (domain && domain->is_deleted)
+ tomoyo_io_printf(head, "# This is a deleted domain.\n");
+ return true;
+}
+
+/**
+ * tomoyo_same_task_acl - Check for duplicated "struct tomoyo_task_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_task_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_task_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_task_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return p1->domainname == p2->domainname;
+}
+
+/**
+ * tomoyo_write_task - Update task related list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_task(struct tomoyo_acl_param *param)
+{
+ int error = -EINVAL;
+
+ if (tomoyo_str_starts(&param->data, "manual_domain_transition ")) {
+ struct tomoyo_task_acl e = {
+ .head.type = TOMOYO_TYPE_MANUAL_TASK_ACL,
+ .domainname = tomoyo_get_domainname(param),
+ };
+
+ if (e.domainname)
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_task_acl,
+ NULL);
+ tomoyo_put_name(e.domainname);
+ }
+ return error;
+}
+
+/**
+ * tomoyo_delete_domain - Delete a domain.
+ *
+ * @domainname: The name of domain.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_delete_domain(char *domainname)
+{
+ struct tomoyo_domain_info *domain;
+ struct tomoyo_path_info name;
+
+ name.name = domainname;
+ tomoyo_fill_path_info(&name);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ return -EINTR;
+ /* Is there an active domain? */
+ list_for_each_entry_rcu(domain, &tomoyo_domain_list, list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ /* Never delete tomoyo_kernel_domain */
+ if (domain == &tomoyo_kernel_domain)
+ continue;
+ if (domain->is_deleted ||
+ tomoyo_pathcmp(domain->domainname, &name))
+ continue;
+ domain->is_deleted = true;
+ break;
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ return 0;
+}
+
+/**
+ * tomoyo_write_domain2 - Write domain policy.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @list: Pointer to "struct list_head".
+ * @data: Policy to be interpreted.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
+ struct list_head *list, char *data,
+ const bool is_delete)
+{
+ struct tomoyo_acl_param param = {
+ .ns = ns,
+ .list = list,
+ .data = data,
+ .is_delete = is_delete,
+ };
+ static const struct {
+ const char *keyword;
+ int (*write)(struct tomoyo_acl_param *param);
+ } tomoyo_callback[5] = {
+ { "file ", tomoyo_write_file },
+ { "network inet ", tomoyo_write_inet_network },
+ { "network unix ", tomoyo_write_unix_network },
+ { "misc ", tomoyo_write_misc },
+ { "task ", tomoyo_write_task },
+ };
+ u8 i;
+
+ for (i = 0; i < ARRAY_SIZE(tomoyo_callback); i++) {
+ if (!tomoyo_str_starts(&param.data,
+ tomoyo_callback[i].keyword))
+ continue;
+ return tomoyo_callback[i].write(&param);
+ }
+ return -EINVAL;
+}
+
+/* String table for domain flags. */
+const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS] = {
+ [TOMOYO_DIF_QUOTA_WARNED] = "quota_exceeded\n",
+ [TOMOYO_DIF_TRANSITION_FAILED] = "transition_failed\n",
+};
+
+/**
+ * tomoyo_write_domain - Write domain policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ struct tomoyo_policy_namespace *ns;
+ struct tomoyo_domain_info *domain = head->w.domain;
+ const bool is_delete = head->w.is_delete;
+ bool is_select = !is_delete && tomoyo_str_starts(&data, "select ");
+ unsigned int idx;
+
+ if (*data == '<') {
+ int ret = 0;
+
+ domain = NULL;
+ if (is_delete)
+ ret = tomoyo_delete_domain(data);
+ else if (is_select)
+ domain = tomoyo_find_domain(data);
+ else
+ domain = tomoyo_assign_domain(data, false);
+ head->w.domain = domain;
+ return ret;
+ }
+ if (!domain)
+ return -EINVAL;
+ ns = domain->ns;
+ if (sscanf(data, "use_profile %u", &idx) == 1
+ && idx < TOMOYO_MAX_PROFILES) {
+ if (!tomoyo_policy_loaded || ns->profile_ptr[idx])
+ if (!is_delete)
+ domain->profile = (u8) idx;
+ return 0;
+ }
+ if (sscanf(data, "use_group %u\n", &idx) == 1
+ && idx < TOMOYO_MAX_ACL_GROUPS) {
+ if (!is_delete)
+ set_bit(idx, domain->group);
+ else
+ clear_bit(idx, domain->group);
+ return 0;
+ }
+ for (idx = 0; idx < TOMOYO_MAX_DOMAIN_INFO_FLAGS; idx++) {
+ const char *cp = tomoyo_dif[idx];
+
+ if (strncmp(data, cp, strlen(cp) - 1))
+ continue;
+ domain->flags[idx] = !is_delete;
+ return 0;
+ }
+ return tomoyo_write_domain2(ns, &domain->acl_info_list, data,
+ is_delete);
+}
+
+/**
+ * tomoyo_print_condition - Print condition part.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @cond: Pointer to "struct tomoyo_condition".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
+ const struct tomoyo_condition *cond)
+{
+ switch (head->r.cond_step) {
+ case 0:
+ head->r.cond_index = 0;
+ head->r.cond_step++;
+ if (cond->transit) {
+ tomoyo_set_space(head);
+ tomoyo_set_string(head, cond->transit->name);
+ }
+ fallthrough;
+ case 1:
+ {
+ const u16 condc = cond->condc;
+ const struct tomoyo_condition_element *condp =
+ (typeof(condp)) (cond + 1);
+ const struct tomoyo_number_union *numbers_p =
+ (typeof(numbers_p)) (condp + condc);
+ const struct tomoyo_name_union *names_p =
+ (typeof(names_p))
+ (numbers_p + cond->numbers_count);
+ const struct tomoyo_argv *argv =
+ (typeof(argv)) (names_p + cond->names_count);
+ const struct tomoyo_envp *envp =
+ (typeof(envp)) (argv + cond->argc);
+ u16 skip;
+
+ for (skip = 0; skip < head->r.cond_index; skip++) {
+ const u8 left = condp->left;
+ const u8 right = condp->right;
+
+ condp++;
+ switch (left) {
+ case TOMOYO_ARGV_ENTRY:
+ argv++;
+ continue;
+ case TOMOYO_ENVP_ENTRY:
+ envp++;
+ continue;
+ case TOMOYO_NUMBER_UNION:
+ numbers_p++;
+ break;
+ }
+ switch (right) {
+ case TOMOYO_NAME_UNION:
+ names_p++;
+ break;
+ case TOMOYO_NUMBER_UNION:
+ numbers_p++;
+ break;
+ }
+ }
+ while (head->r.cond_index < condc) {
+ const u8 match = condp->equals;
+ const u8 left = condp->left;
+ const u8 right = condp->right;
+
+ if (!tomoyo_flush(head))
+ return false;
+ condp++;
+ head->r.cond_index++;
+ tomoyo_set_space(head);
+ switch (left) {
+ case TOMOYO_ARGV_ENTRY:
+ tomoyo_io_printf(head,
+ "exec.argv[%lu]%s=\"",
+ argv->index, argv->is_not ? "!" : "");
+ tomoyo_set_string(head,
+ argv->value->name);
+ tomoyo_set_string(head, "\"");
+ argv++;
+ continue;
+ case TOMOYO_ENVP_ENTRY:
+ tomoyo_set_string(head,
+ "exec.envp[\"");
+ tomoyo_set_string(head,
+ envp->name->name);
+ tomoyo_io_printf(head, "\"]%s=", envp->is_not ? "!" : "");
+ if (envp->value) {
+ tomoyo_set_string(head, "\"");
+ tomoyo_set_string(head, envp->value->name);
+ tomoyo_set_string(head, "\"");
+ } else {
+ tomoyo_set_string(head,
+ "NULL");
+ }
+ envp++;
+ continue;
+ case TOMOYO_NUMBER_UNION:
+ tomoyo_print_number_union_nospace
+ (head, numbers_p++);
+ break;
+ default:
+ tomoyo_set_string(head,
+ tomoyo_condition_keyword[left]);
+ break;
+ }
+ tomoyo_set_string(head, match ? "=" : "!=");
+ switch (right) {
+ case TOMOYO_NAME_UNION:
+ tomoyo_print_name_union_quoted
+ (head, names_p++);
+ break;
+ case TOMOYO_NUMBER_UNION:
+ tomoyo_print_number_union_nospace
+ (head, numbers_p++);
+ break;
+ default:
+ tomoyo_set_string(head,
+ tomoyo_condition_keyword[right]);
+ break;
+ }
+ }
+ }
+ head->r.cond_step++;
+ fallthrough;
+ case 2:
+ if (!tomoyo_flush(head))
+ break;
+ head->r.cond_step++;
+ fallthrough;
+ case 3:
+ if (cond->grant_log != TOMOYO_GRANTLOG_AUTO)
+ tomoyo_io_printf(head, " grant_log=%s",
+ tomoyo_yesno(cond->grant_log ==
+ TOMOYO_GRANTLOG_YES));
+ tomoyo_set_lf(head);
+ return true;
+ }
+ return false;
+}
+
+/**
+ * tomoyo_set_group - Print "acl_group " header keyword and category name.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @category: Category name.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_set_group(struct tomoyo_io_buffer *head,
+ const char *category)
+{
+ if (head->type == TOMOYO_EXCEPTIONPOLICY) {
+ tomoyo_print_namespace(head);
+ tomoyo_io_printf(head, "acl_group %u ",
+ head->r.acl_group_index);
+ }
+ tomoyo_set_string(head, category);
+}
+
+/**
+ * tomoyo_print_entry - Print an ACL entry.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @acl: Pointer to an ACL entry.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
+ struct tomoyo_acl_info *acl)
+{
+ const u8 acl_type = acl->type;
+ bool first = true;
+ u8 bit;
+
+ if (head->r.print_cond_part)
+ goto print_cond_part;
+ if (acl->is_deleted)
+ return true;
+ if (!tomoyo_flush(head))
+ return false;
+ else if (acl_type == TOMOYO_TYPE_PATH_ACL) {
+ struct tomoyo_path_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u16 perm = ptr->perm;
+
+ for (bit = 0; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (head->r.print_transition_related_only &&
+ bit != TOMOYO_TYPE_EXECUTE)
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "file ");
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_path_keyword[bit]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name);
+ } else if (acl_type == TOMOYO_TYPE_MANUAL_TASK_ACL) {
+ struct tomoyo_task_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+
+ tomoyo_set_group(head, "task ");
+ tomoyo_set_string(head, "manual_domain_transition ");
+ tomoyo_set_string(head, ptr->domainname->name);
+ } else if (head->r.print_transition_related_only) {
+ return true;
+ } else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
+ struct tomoyo_path2_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+
+ for (bit = 0; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "file ");
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_mac_keywords
+ [tomoyo_pp2mac[bit]]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name1);
+ tomoyo_print_name_union(head, &ptr->name2);
+ } else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
+ struct tomoyo_path_number_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+
+ for (bit = 0; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "file ");
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_mac_keywords
+ [tomoyo_pn2mac[bit]]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name);
+ tomoyo_print_number_union(head, &ptr->number);
+ } else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
+ struct tomoyo_mkdev_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+
+ for (bit = 0; bit < TOMOYO_MAX_MKDEV_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "file ");
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_mac_keywords
+ [tomoyo_pnnn2mac[bit]]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name);
+ tomoyo_print_number_union(head, &ptr->mode);
+ tomoyo_print_number_union(head, &ptr->major);
+ tomoyo_print_number_union(head, &ptr->minor);
+ } else if (acl_type == TOMOYO_TYPE_INET_ACL) {
+ struct tomoyo_inet_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+
+ for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "network inet ");
+ tomoyo_set_string(head, tomoyo_proto_keyword
+ [ptr->protocol]);
+ tomoyo_set_space(head);
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
+ }
+ if (first)
+ return true;
+ tomoyo_set_space(head);
+ if (ptr->address.group) {
+ tomoyo_set_string(head, "@");
+ tomoyo_set_string(head, ptr->address.group->group_name
+ ->name);
+ } else {
+ char buf[128];
+
+ tomoyo_print_ip(buf, sizeof(buf), &ptr->address);
+ tomoyo_io_printf(head, "%s", buf);
+ }
+ tomoyo_print_number_union(head, &ptr->port);
+ } else if (acl_type == TOMOYO_TYPE_UNIX_ACL) {
+ struct tomoyo_unix_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+ const u8 perm = ptr->perm;
+
+ for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
+ if (!(perm & (1 << bit)))
+ continue;
+ if (first) {
+ tomoyo_set_group(head, "network unix ");
+ tomoyo_set_string(head, tomoyo_proto_keyword
+ [ptr->protocol]);
+ tomoyo_set_space(head);
+ first = false;
+ } else {
+ tomoyo_set_slash(head);
+ }
+ tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
+ }
+ if (first)
+ return true;
+ tomoyo_print_name_union(head, &ptr->name);
+ } else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
+ struct tomoyo_mount_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+
+ tomoyo_set_group(head, "file mount");
+ tomoyo_print_name_union(head, &ptr->dev_name);
+ tomoyo_print_name_union(head, &ptr->dir_name);
+ tomoyo_print_name_union(head, &ptr->fs_type);
+ tomoyo_print_number_union(head, &ptr->flags);
+ } else if (acl_type == TOMOYO_TYPE_ENV_ACL) {
+ struct tomoyo_env_acl *ptr =
+ container_of(acl, typeof(*ptr), head);
+
+ tomoyo_set_group(head, "misc env ");
+ tomoyo_set_string(head, ptr->env->name);
+ }
+ if (acl->cond) {
+ head->r.print_cond_part = true;
+ head->r.cond_step = 0;
+ if (!tomoyo_flush(head))
+ return false;
+print_cond_part:
+ if (!tomoyo_print_condition(head, acl->cond))
+ return false;
+ head->r.print_cond_part = false;
+ } else {
+ tomoyo_set_lf(head);
+ }
+ return true;
+}
+
+/**
+ * tomoyo_read_domain2 - Read domain policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @list: Pointer to "struct list_head".
+ *
+ * Caller holds tomoyo_read_lock().
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
+ struct list_head *list)
+{
+ list_for_each_cookie(head->r.acl, list) {
+ struct tomoyo_acl_info *ptr =
+ list_entry(head->r.acl, typeof(*ptr), list);
+
+ if (!tomoyo_print_entry(head, ptr))
+ return false;
+ }
+ head->r.acl = NULL;
+ return true;
+}
+
+/**
+ * tomoyo_read_domain - Read domain policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
+{
+ if (head->r.eof)
+ return;
+ list_for_each_cookie(head->r.domain, &tomoyo_domain_list) {
+ struct tomoyo_domain_info *domain =
+ list_entry(head->r.domain, typeof(*domain), list);
+ u8 i;
+
+ switch (head->r.step) {
+ case 0:
+ if (domain->is_deleted &&
+ !head->r.print_this_domain_only)
+ continue;
+ /* Print domainname and flags. */
+ tomoyo_set_string(head, domain->domainname->name);
+ tomoyo_set_lf(head);
+ tomoyo_io_printf(head, "use_profile %u\n",
+ domain->profile);
+ for (i = 0; i < TOMOYO_MAX_DOMAIN_INFO_FLAGS; i++)
+ if (domain->flags[i])
+ tomoyo_set_string(head, tomoyo_dif[i]);
+ head->r.index = 0;
+ head->r.step++;
+ fallthrough;
+ case 1:
+ while (head->r.index < TOMOYO_MAX_ACL_GROUPS) {
+ i = head->r.index++;
+ if (!test_bit(i, domain->group))
+ continue;
+ tomoyo_io_printf(head, "use_group %u\n", i);
+ if (!tomoyo_flush(head))
+ return;
+ }
+ head->r.index = 0;
+ head->r.step++;
+ tomoyo_set_lf(head);
+ fallthrough;
+ case 2:
+ if (!tomoyo_read_domain2(head, &domain->acl_info_list))
+ return;
+ head->r.step++;
+ if (!tomoyo_set_lf(head))
+ return;
+ fallthrough;
+ case 3:
+ head->r.step = 0;
+ if (head->r.print_this_domain_only)
+ goto done;
+ }
+ }
+ done:
+ head->r.eof = true;
+}
+
+/**
+ * tomoyo_write_pid: Specify PID to obtain domainname.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
+{
+ head->r.eof = false;
+ return 0;
+}
+
+/**
+ * tomoyo_read_pid - Get domainname of the specified PID.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns the domainname which the specified PID is in on success,
+ * empty string otherwise.
+ * The PID is specified by tomoyo_write_pid() so that the user can obtain
+ * using read()/write() interface rather than sysctl() interface.
+ */
+static void tomoyo_read_pid(struct tomoyo_io_buffer *head)
+{
+ char *buf = head->write_buf;
+ bool global_pid = false;
+ unsigned int pid;
+ struct task_struct *p;
+ struct tomoyo_domain_info *domain = NULL;
+
+ /* Accessing write_buf is safe because head->io_sem is held. */
+ if (!buf) {
+ head->r.eof = true;
+ return; /* Do nothing if open(O_RDONLY). */
+ }
+ if (head->r.w_pos || head->r.eof)
+ return;
+ head->r.eof = true;
+ if (tomoyo_str_starts(&buf, "global-pid "))
+ global_pid = true;
+ if (kstrtouint(buf, 10, &pid))
+ return;
+ rcu_read_lock();
+ if (global_pid)
+ p = find_task_by_pid_ns(pid, &init_pid_ns);
+ else
+ p = find_task_by_vpid(pid);
+ if (p)
+ domain = tomoyo_task(p)->domain_info;
+ rcu_read_unlock();
+ if (!domain)
+ return;
+ tomoyo_io_printf(head, "%u %u ", pid, domain->profile);
+ tomoyo_set_string(head, domain->domainname->name);
+}
+
+/* String table for domain transition control keywords. */
+static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
+ [TOMOYO_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
+ [TOMOYO_TRANSITION_CONTROL_RESET] = "reset_domain ",
+ [TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
+ [TOMOYO_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
+ [TOMOYO_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
+ [TOMOYO_TRANSITION_CONTROL_KEEP] = "keep_domain ",
+};
+
+/* String table for grouping keywords. */
+static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
+ [TOMOYO_PATH_GROUP] = "path_group ",
+ [TOMOYO_NUMBER_GROUP] = "number_group ",
+ [TOMOYO_ADDRESS_GROUP] = "address_group ",
+};
+
+/**
+ * tomoyo_write_exception - Write exception policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
+{
+ const bool is_delete = head->w.is_delete;
+ struct tomoyo_acl_param param = {
+ .ns = head->w.ns,
+ .is_delete = is_delete,
+ .data = head->write_buf,
+ };
+ u8 i;
+
+ if (tomoyo_str_starts(&param.data, "aggregator "))
+ return tomoyo_write_aggregator(&param);
+ for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
+ if (tomoyo_str_starts(&param.data, tomoyo_transition_type[i]))
+ return tomoyo_write_transition_control(&param, i);
+ for (i = 0; i < TOMOYO_MAX_GROUP; i++)
+ if (tomoyo_str_starts(&param.data, tomoyo_group_name[i]))
+ return tomoyo_write_group(&param, i);
+ if (tomoyo_str_starts(&param.data, "acl_group ")) {
+ unsigned int group;
+ char *data;
+
+ group = simple_strtoul(param.data, &data, 10);
+ if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
+ return tomoyo_write_domain2
+ (head->w.ns, &head->w.ns->acl_group[group],
+ data, is_delete);
+ }
+ return -EINVAL;
+}
+
+/**
+ * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @idx: Index number.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
+{
+ struct tomoyo_policy_namespace *ns =
+ container_of(head->r.ns, typeof(*ns), namespace_list);
+ struct list_head *list = &ns->group_list[idx];
+
+ list_for_each_cookie(head->r.group, list) {
+ struct tomoyo_group *group =
+ list_entry(head->r.group, typeof(*group), head.list);
+
+ list_for_each_cookie(head->r.acl, &group->member_list) {
+ struct tomoyo_acl_head *ptr =
+ list_entry(head->r.acl, typeof(*ptr), list);
+
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_flush(head))
+ return false;
+ tomoyo_print_namespace(head);
+ tomoyo_set_string(head, tomoyo_group_name[idx]);
+ tomoyo_set_string(head, group->group_name->name);
+ if (idx == TOMOYO_PATH_GROUP) {
+ tomoyo_set_space(head);
+ tomoyo_set_string(head, container_of
+ (ptr, struct tomoyo_path_group,
+ head)->member_name->name);
+ } else if (idx == TOMOYO_NUMBER_GROUP) {
+ tomoyo_print_number_union(head, &container_of
+ (ptr,
+ struct tomoyo_number_group,
+ head)->number);
+ } else if (idx == TOMOYO_ADDRESS_GROUP) {
+ char buffer[128];
+ struct tomoyo_address_group *member =
+ container_of(ptr, typeof(*member),
+ head);
+
+ tomoyo_print_ip(buffer, sizeof(buffer),
+ &member->address);
+ tomoyo_io_printf(head, " %s", buffer);
+ }
+ tomoyo_set_lf(head);
+ }
+ head->r.acl = NULL;
+ }
+ head->r.group = NULL;
+ return true;
+}
+
+/**
+ * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @idx: Index number.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
+{
+ struct tomoyo_policy_namespace *ns =
+ container_of(head->r.ns, typeof(*ns), namespace_list);
+ struct list_head *list = &ns->policy_list[idx];
+
+ list_for_each_cookie(head->r.acl, list) {
+ struct tomoyo_acl_head *acl =
+ container_of(head->r.acl, typeof(*acl), list);
+ if (acl->is_deleted)
+ continue;
+ if (!tomoyo_flush(head))
+ return false;
+ switch (idx) {
+ case TOMOYO_ID_TRANSITION_CONTROL:
+ {
+ struct tomoyo_transition_control *ptr =
+ container_of(acl, typeof(*ptr), head);
+
+ tomoyo_print_namespace(head);
+ tomoyo_set_string(head, tomoyo_transition_type
+ [ptr->type]);
+ tomoyo_set_string(head, ptr->program ?
+ ptr->program->name : "any");
+ tomoyo_set_string(head, " from ");
+ tomoyo_set_string(head, ptr->domainname ?
+ ptr->domainname->name :
+ "any");
+ }
+ break;
+ case TOMOYO_ID_AGGREGATOR:
+ {
+ struct tomoyo_aggregator *ptr =
+ container_of(acl, typeof(*ptr), head);
+
+ tomoyo_print_namespace(head);
+ tomoyo_set_string(head, "aggregator ");
+ tomoyo_set_string(head,
+ ptr->original_name->name);
+ tomoyo_set_space(head);
+ tomoyo_set_string(head,
+ ptr->aggregated_name->name);
+ }
+ break;
+ default:
+ continue;
+ }
+ tomoyo_set_lf(head);
+ }
+ head->r.acl = NULL;
+ return true;
+}
+
+/**
+ * tomoyo_read_exception - Read exception policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
+{
+ struct tomoyo_policy_namespace *ns =
+ container_of(head->r.ns, typeof(*ns), namespace_list);
+
+ if (head->r.eof)
+ return;
+ while (head->r.step < TOMOYO_MAX_POLICY &&
+ tomoyo_read_policy(head, head->r.step))
+ head->r.step++;
+ if (head->r.step < TOMOYO_MAX_POLICY)
+ return;
+ while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
+ tomoyo_read_group(head, head->r.step - TOMOYO_MAX_POLICY))
+ head->r.step++;
+ if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
+ return;
+ while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
+ + TOMOYO_MAX_ACL_GROUPS) {
+ head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
+ - TOMOYO_MAX_GROUP;
+ if (!tomoyo_read_domain2(head, &ns->acl_group
+ [head->r.acl_group_index]))
+ return;
+ head->r.step++;
+ }
+ head->r.eof = true;
+}
+
+/* Wait queue for kernel -> userspace notification. */
+static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
+/* Wait queue for userspace -> kernel notification. */
+static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
+
+/* Structure for query. */
+struct tomoyo_query {
+ struct list_head list;
+ struct tomoyo_domain_info *domain;
+ char *query;
+ size_t query_len;
+ unsigned int serial;
+ u8 timer;
+ u8 answer;
+ u8 retry;
+};
+
+/* The list for "struct tomoyo_query". */
+static LIST_HEAD(tomoyo_query_list);
+
+/* Lock for manipulating tomoyo_query_list. */
+static DEFINE_SPINLOCK(tomoyo_query_list_lock);
+
+/*
+ * Number of "struct file" referring /sys/kernel/security/tomoyo/query
+ * interface.
+ */
+static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
+
+/**
+ * tomoyo_truncate - Truncate a line.
+ *
+ * @str: String to truncate.
+ *
+ * Returns length of truncated @str.
+ */
+static int tomoyo_truncate(char *str)
+{
+ char *start = str;
+
+ while (*(unsigned char *) str > (unsigned char) ' ')
+ str++;
+ *str = '\0';
+ return strlen(start) + 1;
+}
+
+/**
+ * tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @header: Lines containing ACL.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
+{
+ char *buffer;
+ char *realpath = NULL;
+ char *argv0 = NULL;
+ char *symlink = NULL;
+ char *cp = strchr(header, '\n');
+ int len;
+
+ if (!cp)
+ return;
+ cp = strchr(cp + 1, '\n');
+ if (!cp)
+ return;
+ *cp++ = '\0';
+ len = strlen(cp) + 1;
+ /* strstr() will return NULL if ordering is wrong. */
+ if (*cp == 'f') {
+ argv0 = strstr(header, " argv[]={ \"");
+ if (argv0) {
+ argv0 += 10;
+ len += tomoyo_truncate(argv0) + 14;
+ }
+ realpath = strstr(header, " exec={ realpath=\"");
+ if (realpath) {
+ realpath += 8;
+ len += tomoyo_truncate(realpath) + 6;
+ }
+ symlink = strstr(header, " symlink.target=\"");
+ if (symlink)
+ len += tomoyo_truncate(symlink + 1) + 1;
+ }
+ buffer = kmalloc(len, GFP_NOFS);
+ if (!buffer)
+ return;
+ snprintf(buffer, len - 1, "%s", cp);
+ if (realpath)
+ tomoyo_addprintf(buffer, len, " exec.%s", realpath);
+ if (argv0)
+ tomoyo_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
+ if (symlink)
+ tomoyo_addprintf(buffer, len, "%s", symlink);
+ tomoyo_normalize_line(buffer);
+ if (!tomoyo_write_domain2(domain->ns, &domain->acl_info_list, buffer,
+ false))
+ tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
+ kfree(buffer);
+}
+
+/**
+ * tomoyo_supervisor - Ask for the supervisor's decision.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @fmt: The printf()'s format string, followed by parameters.
+ *
+ * Returns 0 if the supervisor decided to permit the access request which
+ * violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
+ * supervisor decided to retry the access request which violated the policy in
+ * enforcing mode, 0 if it is not in enforcing mode, -EPERM otherwise.
+ */
+int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
+{
+ va_list args;
+ int error;
+ int len;
+ static unsigned int tomoyo_serial;
+ struct tomoyo_query entry = { };
+ bool quota_exceeded = false;
+
+ va_start(args, fmt);
+ len = vsnprintf((char *) &len, 1, fmt, args) + 1;
+ va_end(args);
+ /* Write /sys/kernel/security/tomoyo/audit. */
+ va_start(args, fmt);
+ tomoyo_write_log2(r, len, fmt, args);
+ va_end(args);
+ /* Nothing more to do if granted. */
+ if (r->granted)
+ return 0;
+ if (r->mode)
+ tomoyo_update_stat(r->mode);
+ switch (r->mode) {
+ case TOMOYO_CONFIG_ENFORCING:
+ error = -EPERM;
+ if (atomic_read(&tomoyo_query_observers))
+ break;
+ goto out;
+ case TOMOYO_CONFIG_LEARNING:
+ error = 0;
+ /* Check max_learning_entry parameter. */
+ if (tomoyo_domain_quota_is_ok(r))
+ break;
+ fallthrough;
+ default:
+ return 0;
+ }
+ /* Get message. */
+ va_start(args, fmt);
+ entry.query = tomoyo_init_log(r, len, fmt, args);
+ va_end(args);
+ if (!entry.query)
+ goto out;
+ entry.query_len = strlen(entry.query) + 1;
+ if (!error) {
+ tomoyo_add_entry(r->domain, entry.query);
+ goto out;
+ }
+ len = tomoyo_round2(entry.query_len);
+ entry.domain = r->domain;
+ spin_lock(&tomoyo_query_list_lock);
+ if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
+ tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
+ >= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
+ quota_exceeded = true;
+ } else {
+ entry.serial = tomoyo_serial++;
+ entry.retry = r->retry;
+ tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
+ list_add_tail(&entry.list, &tomoyo_query_list);
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (quota_exceeded)
+ goto out;
+ /* Give 10 seconds for supervisor's opinion. */
+ while (entry.timer < 10) {
+ wake_up_all(&tomoyo_query_wait);
+ if (wait_event_interruptible_timeout
+ (tomoyo_answer_wait, entry.answer ||
+ !atomic_read(&tomoyo_query_observers), HZ))
+ break;
+ entry.timer++;
+ }
+ spin_lock(&tomoyo_query_list_lock);
+ list_del(&entry.list);
+ tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
+ spin_unlock(&tomoyo_query_list_lock);
+ switch (entry.answer) {
+ case 3: /* Asked to retry by administrator. */
+ error = TOMOYO_RETRY_REQUEST;
+ r->retry++;
+ break;
+ case 1:
+ /* Granted by administrator. */
+ error = 0;
+ break;
+ default:
+ /* Timed out or rejected by administrator. */
+ break;
+ }
+out:
+ kfree(entry.query);
+ return error;
+}
+
+/**
+ * tomoyo_find_domain_by_qid - Get domain by query id.
+ *
+ * @serial: Query ID assigned by tomoyo_supervisor().
+ *
+ * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
+ */
+static struct tomoyo_domain_info *tomoyo_find_domain_by_qid
+(unsigned int serial)
+{
+ struct tomoyo_query *ptr;
+ struct tomoyo_domain_info *domain = NULL;
+
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each_entry(ptr, &tomoyo_query_list, list) {
+ if (ptr->serial != serial)
+ continue;
+ domain = ptr->domain;
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ return domain;
+}
+
+/**
+ * tomoyo_poll_query - poll() for /sys/kernel/security/tomoyo/query.
+ *
+ * @file: Pointer to "struct file".
+ * @wait: Pointer to "poll_table".
+ *
+ * Returns EPOLLIN | EPOLLRDNORM when ready to read, 0 otherwise.
+ *
+ * Waits for access requests which violated policy in enforcing mode.
+ */
+static __poll_t tomoyo_poll_query(struct file *file, poll_table *wait)
+{
+ if (!list_empty(&tomoyo_query_list))
+ return EPOLLIN | EPOLLRDNORM;
+ poll_wait(file, &tomoyo_query_wait, wait);
+ if (!list_empty(&tomoyo_query_list))
+ return EPOLLIN | EPOLLRDNORM;
+ return 0;
+}
+
+/**
+ * tomoyo_read_query - Read access requests which violated policy in enforcing mode.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ */
+static void tomoyo_read_query(struct tomoyo_io_buffer *head)
+{
+ struct list_head *tmp;
+ unsigned int pos = 0;
+ size_t len = 0;
+ char *buf;
+
+ if (head->r.w_pos)
+ return;
+ kfree(head->read_buf);
+ head->read_buf = NULL;
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
+
+ if (pos++ != head->r.query_index)
+ continue;
+ len = ptr->query_len;
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (!len) {
+ head->r.query_index = 0;
+ return;
+ }
+ buf = kzalloc(len + 32, GFP_NOFS);
+ if (!buf)
+ return;
+ pos = 0;
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
+
+ if (pos++ != head->r.query_index)
+ continue;
+ /*
+ * Some query can be skipped because tomoyo_query_list
+ * can change, but I don't care.
+ */
+ if (len == ptr->query_len)
+ snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
+ ptr->retry, ptr->query);
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (buf[0]) {
+ head->read_buf = buf;
+ head->r.w[head->r.w_pos++] = buf;
+ head->r.query_index++;
+ } else {
+ kfree(buf);
+ }
+}
+
+/**
+ * tomoyo_write_answer - Write the supervisor's decision.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, -EINVAL otherwise.
+ */
+static int tomoyo_write_answer(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ struct list_head *tmp;
+ unsigned int serial;
+ unsigned int answer;
+
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
+
+ ptr->timer = 0;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
+ return -EINVAL;
+ spin_lock(&tomoyo_query_list_lock);
+ list_for_each(tmp, &tomoyo_query_list) {
+ struct tomoyo_query *ptr = list_entry(tmp, typeof(*ptr), list);
+
+ if (ptr->serial != serial)
+ continue;
+ ptr->answer = answer;
+ /* Remove from tomoyo_query_list. */
+ if (ptr->answer)
+ list_del_init(&ptr->list);
+ break;
+ }
+ spin_unlock(&tomoyo_query_list_lock);
+ return 0;
+}
+
+/**
+ * tomoyo_read_version: Get version.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns version information.
+ */
+static void tomoyo_read_version(struct tomoyo_io_buffer *head)
+{
+ if (!head->r.eof) {
+ tomoyo_io_printf(head, "2.6.0");
+ head->r.eof = true;
+ }
+}
+
+/* String table for /sys/kernel/security/tomoyo/stat interface. */
+static const char * const tomoyo_policy_headers[TOMOYO_MAX_POLICY_STAT] = {
+ [TOMOYO_STAT_POLICY_UPDATES] = "update:",
+ [TOMOYO_STAT_POLICY_LEARNING] = "violation in learning mode:",
+ [TOMOYO_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
+ [TOMOYO_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
+};
+
+/* String table for /sys/kernel/security/tomoyo/stat interface. */
+static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = {
+ [TOMOYO_MEMORY_POLICY] = "policy:",
+ [TOMOYO_MEMORY_AUDIT] = "audit log:",
+ [TOMOYO_MEMORY_QUERY] = "query message:",
+};
+
+/* Counter for number of updates. */
+static atomic_t tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT];
+/* Timestamp counter for last updated. */
+static time64_t tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT];
+
+/**
+ * tomoyo_update_stat - Update statistic counters.
+ *
+ * @index: Index for policy type.
+ *
+ * Returns nothing.
+ */
+void tomoyo_update_stat(const u8 index)
+{
+ atomic_inc(&tomoyo_stat_updated[index]);
+ tomoyo_stat_modified[index] = ktime_get_real_seconds();
+}
+
+/**
+ * tomoyo_read_stat - Read statistic data.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_read_stat(struct tomoyo_io_buffer *head)
+{
+ u8 i;
+ unsigned int total = 0;
+
+ if (head->r.eof)
+ return;
+ for (i = 0; i < TOMOYO_MAX_POLICY_STAT; i++) {
+ tomoyo_io_printf(head, "Policy %-30s %10u",
+ tomoyo_policy_headers[i],
+ atomic_read(&tomoyo_stat_updated[i]));
+ if (tomoyo_stat_modified[i]) {
+ struct tomoyo_time stamp;
+
+ tomoyo_convert_time(tomoyo_stat_modified[i], &stamp);
+ tomoyo_io_printf(head, " (Last: %04u/%02u/%02u %02u:%02u:%02u)",
+ stamp.year, stamp.month, stamp.day,
+ stamp.hour, stamp.min, stamp.sec);
+ }
+ tomoyo_set_lf(head);
+ }
+ for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++) {
+ unsigned int used = tomoyo_memory_used[i];
+
+ total += used;
+ tomoyo_io_printf(head, "Memory used by %-22s %10u",
+ tomoyo_memory_headers[i], used);
+ used = tomoyo_memory_quota[i];
+ if (used)
+ tomoyo_io_printf(head, " (Quota: %10u)", used);
+ tomoyo_set_lf(head);
+ }
+ tomoyo_io_printf(head, "Total memory used: %10u\n",
+ total);
+ head->r.eof = true;
+}
+
+/**
+ * tomoyo_write_stat - Set memory quota.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+static int tomoyo_write_stat(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ u8 i;
+
+ if (tomoyo_str_starts(&data, "Memory used by "))
+ for (i = 0; i < TOMOYO_MAX_MEMORY_STAT; i++)
+ if (tomoyo_str_starts(&data, tomoyo_memory_headers[i]))
+ sscanf(data, "%u", &tomoyo_memory_quota[i]);
+ return 0;
+}
+
+/**
+ * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @type: Type of interface.
+ * @file: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_open_control(const u8 type, struct file *file)
+{
+ struct tomoyo_io_buffer *head = kzalloc(sizeof(*head), GFP_NOFS);
+
+ if (!head)
+ return -ENOMEM;
+ mutex_init(&head->io_sem);
+ head->type = type;
+ switch (type) {
+ case TOMOYO_DOMAINPOLICY:
+ /* /sys/kernel/security/tomoyo/domain_policy */
+ head->write = tomoyo_write_domain;
+ head->read = tomoyo_read_domain;
+ break;
+ case TOMOYO_EXCEPTIONPOLICY:
+ /* /sys/kernel/security/tomoyo/exception_policy */
+ head->write = tomoyo_write_exception;
+ head->read = tomoyo_read_exception;
+ break;
+ case TOMOYO_AUDIT:
+ /* /sys/kernel/security/tomoyo/audit */
+ head->poll = tomoyo_poll_log;
+ head->read = tomoyo_read_log;
+ break;
+ case TOMOYO_PROCESS_STATUS:
+ /* /sys/kernel/security/tomoyo/.process_status */
+ head->write = tomoyo_write_pid;
+ head->read = tomoyo_read_pid;
+ break;
+ case TOMOYO_VERSION:
+ /* /sys/kernel/security/tomoyo/version */
+ head->read = tomoyo_read_version;
+ head->readbuf_size = 128;
+ break;
+ case TOMOYO_STAT:
+ /* /sys/kernel/security/tomoyo/stat */
+ head->write = tomoyo_write_stat;
+ head->read = tomoyo_read_stat;
+ head->readbuf_size = 1024;
+ break;
+ case TOMOYO_PROFILE:
+ /* /sys/kernel/security/tomoyo/profile */
+ head->write = tomoyo_write_profile;
+ head->read = tomoyo_read_profile;
+ break;
+ case TOMOYO_QUERY: /* /sys/kernel/security/tomoyo/query */
+ head->poll = tomoyo_poll_query;
+ head->write = tomoyo_write_answer;
+ head->read = tomoyo_read_query;
+ break;
+ case TOMOYO_MANAGER:
+ /* /sys/kernel/security/tomoyo/manager */
+ head->write = tomoyo_write_manager;
+ head->read = tomoyo_read_manager;
+ break;
+ }
+ if (!(file->f_mode & FMODE_READ)) {
+ /*
+ * No need to allocate read_buf since it is not opened
+ * for reading.
+ */
+ head->read = NULL;
+ head->poll = NULL;
+ } else if (!head->poll) {
+ /* Don't allocate read_buf for poll() access. */
+ if (!head->readbuf_size)
+ head->readbuf_size = 4096 * 2;
+ head->read_buf = kzalloc(head->readbuf_size, GFP_NOFS);
+ if (!head->read_buf) {
+ kfree(head);
+ return -ENOMEM;
+ }
+ }
+ if (!(file->f_mode & FMODE_WRITE)) {
+ /*
+ * No need to allocate write_buf since it is not opened
+ * for writing.
+ */
+ head->write = NULL;
+ } else if (head->write) {
+ head->writebuf_size = 4096 * 2;
+ head->write_buf = kzalloc(head->writebuf_size, GFP_NOFS);
+ if (!head->write_buf) {
+ kfree(head->read_buf);
+ kfree(head);
+ return -ENOMEM;
+ }
+ }
+ /*
+ * If the file is /sys/kernel/security/tomoyo/query , increment the
+ * observer counter.
+ * The obserber counter is used by tomoyo_supervisor() to see if
+ * there is some process monitoring /sys/kernel/security/tomoyo/query.
+ */
+ if (type == TOMOYO_QUERY)
+ atomic_inc(&tomoyo_query_observers);
+ file->private_data = head;
+ tomoyo_notify_gc(head, true);
+ return 0;
+}
+
+/**
+ * tomoyo_poll_control - poll() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @wait: Pointer to "poll_table". Maybe NULL.
+ *
+ * Returns EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM if ready to read/write,
+ * EPOLLOUT | EPOLLWRNORM otherwise.
+ */
+__poll_t tomoyo_poll_control(struct file *file, poll_table *wait)
+{
+ struct tomoyo_io_buffer *head = file->private_data;
+
+ if (head->poll)
+ return head->poll(file, wait) | EPOLLOUT | EPOLLWRNORM;
+ return EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM;
+}
+
+/**
+ * tomoyo_set_namespace_cursor - Set namespace to read.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_set_namespace_cursor(struct tomoyo_io_buffer *head)
+{
+ struct list_head *ns;
+
+ if (head->type != TOMOYO_EXCEPTIONPOLICY &&
+ head->type != TOMOYO_PROFILE)
+ return;
+ /*
+ * If this is the first read, or reading previous namespace finished
+ * and has more namespaces to read, update the namespace cursor.
+ */
+ ns = head->r.ns;
+ if (!ns || (head->r.eof && ns->next != &tomoyo_namespace_list)) {
+ /* Clearing is OK because tomoyo_flush() returned true. */
+ memset(&head->r, 0, sizeof(head->r));
+ head->r.ns = ns ? ns->next : tomoyo_namespace_list.next;
+ }
+}
+
+/**
+ * tomoyo_has_more_namespace - Check for unread namespaces.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true if we have more entries to print, false otherwise.
+ */
+static inline bool tomoyo_has_more_namespace(struct tomoyo_io_buffer *head)
+{
+ return (head->type == TOMOYO_EXCEPTIONPOLICY ||
+ head->type == TOMOYO_PROFILE) && head->r.eof &&
+ head->r.ns->next != &tomoyo_namespace_list;
+}
+
+/**
+ * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @buffer: Poiner to buffer to write to.
+ * @buffer_len: Size of @buffer.
+ *
+ * Returns bytes read on success, negative value otherwise.
+ */
+ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
+ const int buffer_len)
+{
+ int len;
+ int idx;
+
+ if (!head->read)
+ return -EINVAL;
+ if (mutex_lock_interruptible(&head->io_sem))
+ return -EINTR;
+ head->read_user_buf = buffer;
+ head->read_user_buf_avail = buffer_len;
+ idx = tomoyo_read_lock();
+ if (tomoyo_flush(head))
+ /* Call the policy handler. */
+ do {
+ tomoyo_set_namespace_cursor(head);
+ head->read(head);
+ } while (tomoyo_flush(head) &&
+ tomoyo_has_more_namespace(head));
+ tomoyo_read_unlock(idx);
+ len = head->read_user_buf - buffer;
+ mutex_unlock(&head->io_sem);
+ return len;
+}
+
+/**
+ * tomoyo_parse_policy - Parse a policy line.
+ *
+ * @head: Poiter to "struct tomoyo_io_buffer".
+ * @line: Line to parse.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_parse_policy(struct tomoyo_io_buffer *head, char *line)
+{
+ /* Delete request? */
+ head->w.is_delete = !strncmp(line, "delete ", 7);
+ if (head->w.is_delete)
+ memmove(line, line + 7, strlen(line + 7) + 1);
+ /* Selecting namespace to update. */
+ if (head->type == TOMOYO_EXCEPTIONPOLICY ||
+ head->type == TOMOYO_PROFILE) {
+ if (*line == '<') {
+ char *cp = strchr(line, ' ');
+
+ if (cp) {
+ *cp++ = '\0';
+ head->w.ns = tomoyo_assign_namespace(line);
+ memmove(line, cp, strlen(cp) + 1);
+ } else
+ head->w.ns = NULL;
+ } else
+ head->w.ns = &tomoyo_kernel_namespace;
+ /* Don't allow updating if namespace is invalid. */
+ if (!head->w.ns)
+ return -ENOENT;
+ }
+ /* Do the update. */
+ return head->write(head);
+}
+
+/**
+ * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @buffer: Pointer to buffer to read from.
+ * @buffer_len: Size of @buffer.
+ *
+ * Returns @buffer_len on success, negative value otherwise.
+ */
+ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
+ const char __user *buffer, const int buffer_len)
+{
+ int error = buffer_len;
+ size_t avail_len = buffer_len;
+ char *cp0 = head->write_buf;
+ int idx;
+
+ if (!head->write)
+ return -EINVAL;
+ if (mutex_lock_interruptible(&head->io_sem))
+ return -EINTR;
+ head->read_user_buf_avail = 0;
+ idx = tomoyo_read_lock();
+ /* Read a line and dispatch it to the policy handler. */
+ while (avail_len > 0) {
+ char c;
+
+ if (head->w.avail >= head->writebuf_size - 1) {
+ const int len = head->writebuf_size * 2;
+ char *cp = kzalloc(len, GFP_NOFS);
+
+ if (!cp) {
+ error = -ENOMEM;
+ break;
+ }
+ memmove(cp, cp0, head->w.avail);
+ kfree(cp0);
+ head->write_buf = cp;
+ cp0 = cp;
+ head->writebuf_size = len;
+ }
+ if (get_user(c, buffer)) {
+ error = -EFAULT;
+ break;
+ }
+ buffer++;
+ avail_len--;
+ cp0[head->w.avail++] = c;
+ if (c != '\n')
+ continue;
+ cp0[head->w.avail - 1] = '\0';
+ head->w.avail = 0;
+ tomoyo_normalize_line(cp0);
+ if (!strcmp(cp0, "reset")) {
+ head->w.ns = &tomoyo_kernel_namespace;
+ head->w.domain = NULL;
+ memset(&head->r, 0, sizeof(head->r));
+ continue;
+ }
+ /* Don't allow updating policies by non manager programs. */
+ switch (head->type) {
+ case TOMOYO_PROCESS_STATUS:
+ /* This does not write anything. */
+ break;
+ case TOMOYO_DOMAINPOLICY:
+ if (tomoyo_select_domain(head, cp0))
+ continue;
+ fallthrough;
+ case TOMOYO_EXCEPTIONPOLICY:
+ if (!strcmp(cp0, "select transition_only")) {
+ head->r.print_transition_related_only = true;
+ continue;
+ }
+ fallthrough;
+ default:
+ if (!tomoyo_manager()) {
+ error = -EPERM;
+ goto out;
+ }
+ }
+ switch (tomoyo_parse_policy(head, cp0)) {
+ case -EPERM:
+ error = -EPERM;
+ goto out;
+ case 0:
+ switch (head->type) {
+ case TOMOYO_DOMAINPOLICY:
+ case TOMOYO_EXCEPTIONPOLICY:
+ case TOMOYO_STAT:
+ case TOMOYO_PROFILE:
+ case TOMOYO_MANAGER:
+ tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
+ break;
+ default:
+ break;
+ }
+ break;
+ }
+ }
+out:
+ tomoyo_read_unlock(idx);
+ mutex_unlock(&head->io_sem);
+ return error;
+}
+
+/**
+ * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ */
+void tomoyo_close_control(struct tomoyo_io_buffer *head)
+{
+ /*
+ * If the file is /sys/kernel/security/tomoyo/query , decrement the
+ * observer counter.
+ */
+ if (head->type == TOMOYO_QUERY &&
+ atomic_dec_and_test(&tomoyo_query_observers))
+ wake_up_all(&tomoyo_answer_wait);
+ tomoyo_notify_gc(head, false);
+}
+
+/**
+ * tomoyo_check_profile - Check all profiles currently assigned to domains are defined.
+ */
+void tomoyo_check_profile(void)
+{
+ struct tomoyo_domain_info *domain;
+ const int idx = tomoyo_read_lock();
+
+ tomoyo_policy_loaded = true;
+ pr_info("TOMOYO: 2.6.0\n");
+ list_for_each_entry_rcu(domain, &tomoyo_domain_list, list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ const u8 profile = domain->profile;
+ struct tomoyo_policy_namespace *ns = domain->ns;
+
+ if (ns->profile_version == 20110903) {
+ pr_info_once("Converting profile version from %u to %u.\n",
+ 20110903, 20150505);
+ ns->profile_version = 20150505;
+ }
+ if (ns->profile_version != 20150505)
+ pr_err("Profile version %u is not supported.\n",
+ ns->profile_version);
+ else if (!ns->profile_ptr[profile])
+ pr_err("Profile %u (used by '%s') is not defined.\n",
+ profile, domain->domainname->name);
+ else
+ continue;
+ pr_err("Userland tools for TOMOYO 2.6 must be installed and policy must be initialized.\n");
+ pr_err("Please see https://tomoyo.osdn.jp/2.6/ for more information.\n");
+ panic("STOP!");
+ }
+ tomoyo_read_unlock(idx);
+ pr_info("Mandatory Access Control activated.\n");
+}
+
+/**
+ * tomoyo_load_builtin_policy - Load built-in policy.
+ *
+ * Returns nothing.
+ */
+void __init tomoyo_load_builtin_policy(void)
+{
+#ifdef CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING
+ static char tomoyo_builtin_profile[] __initdata =
+ "PROFILE_VERSION=20150505\n"
+ "0-CONFIG={ mode=learning grant_log=no reject_log=yes }\n";
+ static char tomoyo_builtin_exception_policy[] __initdata =
+ "aggregator proc:/self/exe /proc/self/exe\n";
+ static char tomoyo_builtin_domain_policy[] __initdata = "";
+ static char tomoyo_builtin_manager[] __initdata = "";
+ static char tomoyo_builtin_stat[] __initdata = "";
+#else
+ /*
+ * This include file is manually created and contains built-in policy
+ * named "tomoyo_builtin_profile", "tomoyo_builtin_exception_policy",
+ * "tomoyo_builtin_domain_policy", "tomoyo_builtin_manager",
+ * "tomoyo_builtin_stat" in the form of "static char [] __initdata".
+ */
+#include "builtin-policy.h"
+#endif
+ u8 i;
+ const int idx = tomoyo_read_lock();
+
+ for (i = 0; i < 5; i++) {
+ struct tomoyo_io_buffer head = { };
+ char *start = "";
+
+ switch (i) {
+ case 0:
+ start = tomoyo_builtin_profile;
+ head.type = TOMOYO_PROFILE;
+ head.write = tomoyo_write_profile;
+ break;
+ case 1:
+ start = tomoyo_builtin_exception_policy;
+ head.type = TOMOYO_EXCEPTIONPOLICY;
+ head.write = tomoyo_write_exception;
+ break;
+ case 2:
+ start = tomoyo_builtin_domain_policy;
+ head.type = TOMOYO_DOMAINPOLICY;
+ head.write = tomoyo_write_domain;
+ break;
+ case 3:
+ start = tomoyo_builtin_manager;
+ head.type = TOMOYO_MANAGER;
+ head.write = tomoyo_write_manager;
+ break;
+ case 4:
+ start = tomoyo_builtin_stat;
+ head.type = TOMOYO_STAT;
+ head.write = tomoyo_write_stat;
+ break;
+ }
+ while (1) {
+ char *end = strchr(start, '\n');
+
+ if (!end)
+ break;
+ *end = '\0';
+ tomoyo_normalize_line(start);
+ head.write_buf = start;
+ tomoyo_parse_policy(&head, start);
+ start = end + 1;
+ }
+ }
+ tomoyo_read_unlock(idx);
+#ifdef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+ tomoyo_check_profile();
+#endif
+}
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
new file mode 100644
index 000000000..85246b9df
--- /dev/null
+++ b/security/tomoyo/common.h
@@ -0,0 +1,1334 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * security/tomoyo/common.h
+ *
+ * Header file for TOMOYO.
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#ifndef _SECURITY_TOMOYO_COMMON_H
+#define _SECURITY_TOMOYO_COMMON_H
+
+#define pr_fmt(fmt) fmt
+
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/file.h>
+#include <linux/kmod.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
+#include <linux/list.h>
+#include <linux/cred.h>
+#include <linux/poll.h>
+#include <linux/binfmts.h>
+#include <linux/highmem.h>
+#include <linux/net.h>
+#include <linux/inet.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/un.h>
+#include <linux/lsm_hooks.h>
+#include <net/sock.h>
+#include <net/af_unix.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/udp.h>
+
+/********** Constants definitions. **********/
+
+/*
+ * TOMOYO uses this hash only when appending a string into the string
+ * table. Frequency of appending strings is very low. So we don't need
+ * large (e.g. 64k) hash size. 256 will be sufficient.
+ */
+#define TOMOYO_HASH_BITS 8
+#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
+
+/*
+ * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
+ * Therefore, we don't need SOCK_MAX.
+ */
+#define TOMOYO_SOCK_MAX 6
+
+#define TOMOYO_EXEC_TMPSIZE 4096
+
+/* Garbage collector is trying to kfree() this element. */
+#define TOMOYO_GC_IN_PROGRESS -1
+
+/* Profile number is an integer between 0 and 255. */
+#define TOMOYO_MAX_PROFILES 256
+
+/* Group number is an integer between 0 and 255. */
+#define TOMOYO_MAX_ACL_GROUPS 256
+
+/* Index numbers for "struct tomoyo_condition". */
+enum tomoyo_conditions_index {
+ TOMOYO_TASK_UID, /* current_uid() */
+ TOMOYO_TASK_EUID, /* current_euid() */
+ TOMOYO_TASK_SUID, /* current_suid() */
+ TOMOYO_TASK_FSUID, /* current_fsuid() */
+ TOMOYO_TASK_GID, /* current_gid() */
+ TOMOYO_TASK_EGID, /* current_egid() */
+ TOMOYO_TASK_SGID, /* current_sgid() */
+ TOMOYO_TASK_FSGID, /* current_fsgid() */
+ TOMOYO_TASK_PID, /* sys_getpid() */
+ TOMOYO_TASK_PPID, /* sys_getppid() */
+ TOMOYO_EXEC_ARGC, /* "struct linux_binprm *"->argc */
+ TOMOYO_EXEC_ENVC, /* "struct linux_binprm *"->envc */
+ TOMOYO_TYPE_IS_SOCKET, /* S_IFSOCK */
+ TOMOYO_TYPE_IS_SYMLINK, /* S_IFLNK */
+ TOMOYO_TYPE_IS_FILE, /* S_IFREG */
+ TOMOYO_TYPE_IS_BLOCK_DEV, /* S_IFBLK */
+ TOMOYO_TYPE_IS_DIRECTORY, /* S_IFDIR */
+ TOMOYO_TYPE_IS_CHAR_DEV, /* S_IFCHR */
+ TOMOYO_TYPE_IS_FIFO, /* S_IFIFO */
+ TOMOYO_MODE_SETUID, /* S_ISUID */
+ TOMOYO_MODE_SETGID, /* S_ISGID */
+ TOMOYO_MODE_STICKY, /* S_ISVTX */
+ TOMOYO_MODE_OWNER_READ, /* S_IRUSR */
+ TOMOYO_MODE_OWNER_WRITE, /* S_IWUSR */
+ TOMOYO_MODE_OWNER_EXECUTE, /* S_IXUSR */
+ TOMOYO_MODE_GROUP_READ, /* S_IRGRP */
+ TOMOYO_MODE_GROUP_WRITE, /* S_IWGRP */
+ TOMOYO_MODE_GROUP_EXECUTE, /* S_IXGRP */
+ TOMOYO_MODE_OTHERS_READ, /* S_IROTH */
+ TOMOYO_MODE_OTHERS_WRITE, /* S_IWOTH */
+ TOMOYO_MODE_OTHERS_EXECUTE, /* S_IXOTH */
+ TOMOYO_EXEC_REALPATH,
+ TOMOYO_SYMLINK_TARGET,
+ TOMOYO_PATH1_UID,
+ TOMOYO_PATH1_GID,
+ TOMOYO_PATH1_INO,
+ TOMOYO_PATH1_MAJOR,
+ TOMOYO_PATH1_MINOR,
+ TOMOYO_PATH1_PERM,
+ TOMOYO_PATH1_TYPE,
+ TOMOYO_PATH1_DEV_MAJOR,
+ TOMOYO_PATH1_DEV_MINOR,
+ TOMOYO_PATH2_UID,
+ TOMOYO_PATH2_GID,
+ TOMOYO_PATH2_INO,
+ TOMOYO_PATH2_MAJOR,
+ TOMOYO_PATH2_MINOR,
+ TOMOYO_PATH2_PERM,
+ TOMOYO_PATH2_TYPE,
+ TOMOYO_PATH2_DEV_MAJOR,
+ TOMOYO_PATH2_DEV_MINOR,
+ TOMOYO_PATH1_PARENT_UID,
+ TOMOYO_PATH1_PARENT_GID,
+ TOMOYO_PATH1_PARENT_INO,
+ TOMOYO_PATH1_PARENT_PERM,
+ TOMOYO_PATH2_PARENT_UID,
+ TOMOYO_PATH2_PARENT_GID,
+ TOMOYO_PATH2_PARENT_INO,
+ TOMOYO_PATH2_PARENT_PERM,
+ TOMOYO_MAX_CONDITION_KEYWORD,
+ TOMOYO_NUMBER_UNION,
+ TOMOYO_NAME_UNION,
+ TOMOYO_ARGV_ENTRY,
+ TOMOYO_ENVP_ENTRY,
+};
+
+
+/* Index numbers for stat(). */
+enum tomoyo_path_stat_index {
+ /* Do not change this order. */
+ TOMOYO_PATH1,
+ TOMOYO_PATH1_PARENT,
+ TOMOYO_PATH2,
+ TOMOYO_PATH2_PARENT,
+ TOMOYO_MAX_PATH_STAT
+};
+
+/* Index numbers for operation mode. */
+enum tomoyo_mode_index {
+ TOMOYO_CONFIG_DISABLED,
+ TOMOYO_CONFIG_LEARNING,
+ TOMOYO_CONFIG_PERMISSIVE,
+ TOMOYO_CONFIG_ENFORCING,
+ TOMOYO_CONFIG_MAX_MODE,
+ TOMOYO_CONFIG_WANT_REJECT_LOG = 64,
+ TOMOYO_CONFIG_WANT_GRANT_LOG = 128,
+ TOMOYO_CONFIG_USE_DEFAULT = 255,
+};
+
+/* Index numbers for entry type. */
+enum tomoyo_policy_id {
+ TOMOYO_ID_GROUP,
+ TOMOYO_ID_ADDRESS_GROUP,
+ TOMOYO_ID_PATH_GROUP,
+ TOMOYO_ID_NUMBER_GROUP,
+ TOMOYO_ID_TRANSITION_CONTROL,
+ TOMOYO_ID_AGGREGATOR,
+ TOMOYO_ID_MANAGER,
+ TOMOYO_ID_CONDITION,
+ TOMOYO_ID_NAME,
+ TOMOYO_ID_ACL,
+ TOMOYO_ID_DOMAIN,
+ TOMOYO_MAX_POLICY
+};
+
+/* Index numbers for domain's attributes. */
+enum tomoyo_domain_info_flags_index {
+ /* Quota warnning flag. */
+ TOMOYO_DIF_QUOTA_WARNED,
+ /*
+ * This domain was unable to create a new domain at
+ * tomoyo_find_next_domain() because the name of the domain to be
+ * created was too long or it could not allocate memory.
+ * More than one process continued execve() without domain transition.
+ */
+ TOMOYO_DIF_TRANSITION_FAILED,
+ TOMOYO_MAX_DOMAIN_INFO_FLAGS
+};
+
+/* Index numbers for audit type. */
+enum tomoyo_grant_log {
+ /* Follow profile's configuration. */
+ TOMOYO_GRANTLOG_AUTO,
+ /* Do not generate grant log. */
+ TOMOYO_GRANTLOG_NO,
+ /* Generate grant_log. */
+ TOMOYO_GRANTLOG_YES,
+};
+
+/* Index numbers for group entries. */
+enum tomoyo_group_id {
+ TOMOYO_PATH_GROUP,
+ TOMOYO_NUMBER_GROUP,
+ TOMOYO_ADDRESS_GROUP,
+ TOMOYO_MAX_GROUP
+};
+
+/* Index numbers for type of numeric values. */
+enum tomoyo_value_type {
+ TOMOYO_VALUE_TYPE_INVALID,
+ TOMOYO_VALUE_TYPE_DECIMAL,
+ TOMOYO_VALUE_TYPE_OCTAL,
+ TOMOYO_VALUE_TYPE_HEXADECIMAL,
+};
+
+/* Index numbers for domain transition control keywords. */
+enum tomoyo_transition_type {
+ /* Do not change this order, */
+ TOMOYO_TRANSITION_CONTROL_NO_RESET,
+ TOMOYO_TRANSITION_CONTROL_RESET,
+ TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
+ TOMOYO_TRANSITION_CONTROL_INITIALIZE,
+ TOMOYO_TRANSITION_CONTROL_NO_KEEP,
+ TOMOYO_TRANSITION_CONTROL_KEEP,
+ TOMOYO_MAX_TRANSITION_TYPE
+};
+
+/* Index numbers for Access Controls. */
+enum tomoyo_acl_entry_type_index {
+ TOMOYO_TYPE_PATH_ACL,
+ TOMOYO_TYPE_PATH2_ACL,
+ TOMOYO_TYPE_PATH_NUMBER_ACL,
+ TOMOYO_TYPE_MKDEV_ACL,
+ TOMOYO_TYPE_MOUNT_ACL,
+ TOMOYO_TYPE_INET_ACL,
+ TOMOYO_TYPE_UNIX_ACL,
+ TOMOYO_TYPE_ENV_ACL,
+ TOMOYO_TYPE_MANUAL_TASK_ACL,
+};
+
+/* Index numbers for access controls with one pathname. */
+enum tomoyo_path_acl_index {
+ TOMOYO_TYPE_EXECUTE,
+ TOMOYO_TYPE_READ,
+ TOMOYO_TYPE_WRITE,
+ TOMOYO_TYPE_APPEND,
+ TOMOYO_TYPE_UNLINK,
+ TOMOYO_TYPE_GETATTR,
+ TOMOYO_TYPE_RMDIR,
+ TOMOYO_TYPE_TRUNCATE,
+ TOMOYO_TYPE_SYMLINK,
+ TOMOYO_TYPE_CHROOT,
+ TOMOYO_TYPE_UMOUNT,
+ TOMOYO_MAX_PATH_OPERATION
+};
+
+/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
+enum tomoyo_memory_stat_type {
+ TOMOYO_MEMORY_POLICY,
+ TOMOYO_MEMORY_AUDIT,
+ TOMOYO_MEMORY_QUERY,
+ TOMOYO_MAX_MEMORY_STAT
+};
+
+enum tomoyo_mkdev_acl_index {
+ TOMOYO_TYPE_MKBLOCK,
+ TOMOYO_TYPE_MKCHAR,
+ TOMOYO_MAX_MKDEV_OPERATION
+};
+
+/* Index numbers for socket operations. */
+enum tomoyo_network_acl_index {
+ TOMOYO_NETWORK_BIND, /* bind() operation. */
+ TOMOYO_NETWORK_LISTEN, /* listen() operation. */
+ TOMOYO_NETWORK_CONNECT, /* connect() operation. */
+ TOMOYO_NETWORK_SEND, /* send() operation. */
+ TOMOYO_MAX_NETWORK_OPERATION
+};
+
+/* Index numbers for access controls with two pathnames. */
+enum tomoyo_path2_acl_index {
+ TOMOYO_TYPE_LINK,
+ TOMOYO_TYPE_RENAME,
+ TOMOYO_TYPE_PIVOT_ROOT,
+ TOMOYO_MAX_PATH2_OPERATION
+};
+
+/* Index numbers for access controls with one pathname and one number. */
+enum tomoyo_path_number_acl_index {
+ TOMOYO_TYPE_CREATE,
+ TOMOYO_TYPE_MKDIR,
+ TOMOYO_TYPE_MKFIFO,
+ TOMOYO_TYPE_MKSOCK,
+ TOMOYO_TYPE_IOCTL,
+ TOMOYO_TYPE_CHMOD,
+ TOMOYO_TYPE_CHOWN,
+ TOMOYO_TYPE_CHGRP,
+ TOMOYO_MAX_PATH_NUMBER_OPERATION
+};
+
+/* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
+enum tomoyo_securityfs_interface_index {
+ TOMOYO_DOMAINPOLICY,
+ TOMOYO_EXCEPTIONPOLICY,
+ TOMOYO_PROCESS_STATUS,
+ TOMOYO_STAT,
+ TOMOYO_AUDIT,
+ TOMOYO_VERSION,
+ TOMOYO_PROFILE,
+ TOMOYO_QUERY,
+ TOMOYO_MANAGER
+};
+
+/* Index numbers for special mount operations. */
+enum tomoyo_special_mount {
+ TOMOYO_MOUNT_BIND, /* mount --bind /source /dest */
+ TOMOYO_MOUNT_MOVE, /* mount --move /old /new */
+ TOMOYO_MOUNT_REMOUNT, /* mount -o remount /dir */
+ TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
+ TOMOYO_MOUNT_MAKE_PRIVATE, /* mount --make-private /dir */
+ TOMOYO_MOUNT_MAKE_SLAVE, /* mount --make-slave /dir */
+ TOMOYO_MOUNT_MAKE_SHARED, /* mount --make-shared /dir */
+ TOMOYO_MAX_SPECIAL_MOUNT
+};
+
+/* Index numbers for functionality. */
+enum tomoyo_mac_index {
+ TOMOYO_MAC_FILE_EXECUTE,
+ TOMOYO_MAC_FILE_OPEN,
+ TOMOYO_MAC_FILE_CREATE,
+ TOMOYO_MAC_FILE_UNLINK,
+ TOMOYO_MAC_FILE_GETATTR,
+ TOMOYO_MAC_FILE_MKDIR,
+ TOMOYO_MAC_FILE_RMDIR,
+ TOMOYO_MAC_FILE_MKFIFO,
+ TOMOYO_MAC_FILE_MKSOCK,
+ TOMOYO_MAC_FILE_TRUNCATE,
+ TOMOYO_MAC_FILE_SYMLINK,
+ TOMOYO_MAC_FILE_MKBLOCK,
+ TOMOYO_MAC_FILE_MKCHAR,
+ TOMOYO_MAC_FILE_LINK,
+ TOMOYO_MAC_FILE_RENAME,
+ TOMOYO_MAC_FILE_CHMOD,
+ TOMOYO_MAC_FILE_CHOWN,
+ TOMOYO_MAC_FILE_CHGRP,
+ TOMOYO_MAC_FILE_IOCTL,
+ TOMOYO_MAC_FILE_CHROOT,
+ TOMOYO_MAC_FILE_MOUNT,
+ TOMOYO_MAC_FILE_UMOUNT,
+ TOMOYO_MAC_FILE_PIVOT_ROOT,
+ TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
+ TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
+ TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
+ TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
+ TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
+ TOMOYO_MAC_NETWORK_INET_RAW_BIND,
+ TOMOYO_MAC_NETWORK_INET_RAW_SEND,
+ TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
+ TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
+ TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
+ TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
+ TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
+ TOMOYO_MAC_ENVIRON,
+ TOMOYO_MAX_MAC_INDEX
+};
+
+/* Index numbers for category of functionality. */
+enum tomoyo_mac_category_index {
+ TOMOYO_MAC_CATEGORY_FILE,
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ TOMOYO_MAC_CATEGORY_MISC,
+ TOMOYO_MAX_MAC_CATEGORY_INDEX
+};
+
+/*
+ * Retry this request. Returned by tomoyo_supervisor() if policy violation has
+ * occurred in enforcing mode and the userspace daemon decided to retry.
+ *
+ * We must choose a positive value in order to distinguish "granted" (which is
+ * 0) and "rejected" (which is a negative value) and "retry".
+ */
+#define TOMOYO_RETRY_REQUEST 1
+
+/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
+enum tomoyo_policy_stat_type {
+ /* Do not change this order. */
+ TOMOYO_STAT_POLICY_UPDATES,
+ TOMOYO_STAT_POLICY_LEARNING, /* == TOMOYO_CONFIG_LEARNING */
+ TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
+ TOMOYO_STAT_POLICY_ENFORCING, /* == TOMOYO_CONFIG_ENFORCING */
+ TOMOYO_MAX_POLICY_STAT
+};
+
+/* Index numbers for profile's PREFERENCE values. */
+enum tomoyo_pref_index {
+ TOMOYO_PREF_MAX_AUDIT_LOG,
+ TOMOYO_PREF_MAX_LEARNING_ENTRY,
+ TOMOYO_MAX_PREF
+};
+
+/********** Structure definitions. **********/
+
+/* Common header for holding ACL entries. */
+struct tomoyo_acl_head {
+ struct list_head list;
+ s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
+} __packed;
+
+/* Common header for shared entries. */
+struct tomoyo_shared_acl_head {
+ struct list_head list;
+ atomic_t users;
+} __packed;
+
+struct tomoyo_policy_namespace;
+
+/* Structure for request info. */
+struct tomoyo_request_info {
+ /*
+ * For holding parameters specific to operations which deal files.
+ * NULL if not dealing files.
+ */
+ struct tomoyo_obj_info *obj;
+ /*
+ * For holding parameters specific to execve() request.
+ * NULL if not dealing execve().
+ */
+ struct tomoyo_execve *ee;
+ struct tomoyo_domain_info *domain;
+ /* For holding parameters. */
+ union {
+ struct {
+ const struct tomoyo_path_info *filename;
+ /* For using wildcards at tomoyo_find_next_domain(). */
+ const struct tomoyo_path_info *matched_path;
+ /* One of values in "enum tomoyo_path_acl_index". */
+ u8 operation;
+ } path;
+ struct {
+ const struct tomoyo_path_info *filename1;
+ const struct tomoyo_path_info *filename2;
+ /* One of values in "enum tomoyo_path2_acl_index". */
+ u8 operation;
+ } path2;
+ struct {
+ const struct tomoyo_path_info *filename;
+ unsigned int mode;
+ unsigned int major;
+ unsigned int minor;
+ /* One of values in "enum tomoyo_mkdev_acl_index". */
+ u8 operation;
+ } mkdev;
+ struct {
+ const struct tomoyo_path_info *filename;
+ unsigned long number;
+ /*
+ * One of values in
+ * "enum tomoyo_path_number_acl_index".
+ */
+ u8 operation;
+ } path_number;
+ struct {
+ const struct tomoyo_path_info *name;
+ } environ;
+ struct {
+ const __be32 *address;
+ u16 port;
+ /* One of values smaller than TOMOYO_SOCK_MAX. */
+ u8 protocol;
+ /* One of values in "enum tomoyo_network_acl_index". */
+ u8 operation;
+ bool is_ipv6;
+ } inet_network;
+ struct {
+ const struct tomoyo_path_info *address;
+ /* One of values smaller than TOMOYO_SOCK_MAX. */
+ u8 protocol;
+ /* One of values in "enum tomoyo_network_acl_index". */
+ u8 operation;
+ } unix_network;
+ struct {
+ const struct tomoyo_path_info *type;
+ const struct tomoyo_path_info *dir;
+ const struct tomoyo_path_info *dev;
+ unsigned long flags;
+ int need_dev;
+ } mount;
+ struct {
+ const struct tomoyo_path_info *domainname;
+ } task;
+ } param;
+ struct tomoyo_acl_info *matched_acl;
+ u8 param_type;
+ bool granted;
+ u8 retry;
+ u8 profile;
+ u8 mode; /* One of tomoyo_mode_index . */
+ u8 type;
+};
+
+/* Structure for holding a token. */
+struct tomoyo_path_info {
+ const char *name;
+ u32 hash; /* = full_name_hash(name, strlen(name)) */
+ u16 const_len; /* = tomoyo_const_part_length(name) */
+ bool is_dir; /* = tomoyo_strendswith(name, "/") */
+ bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
+};
+
+/* Structure for holding string data. */
+struct tomoyo_name {
+ struct tomoyo_shared_acl_head head;
+ struct tomoyo_path_info entry;
+};
+
+/* Structure for holding a word. */
+struct tomoyo_name_union {
+ /* Either @filename or @group is NULL. */
+ const struct tomoyo_path_info *filename;
+ struct tomoyo_group *group;
+};
+
+/* Structure for holding a number. */
+struct tomoyo_number_union {
+ unsigned long values[2];
+ struct tomoyo_group *group; /* Maybe NULL. */
+ /* One of values in "enum tomoyo_value_type". */
+ u8 value_type[2];
+};
+
+/* Structure for holding an IP address. */
+struct tomoyo_ipaddr_union {
+ struct in6_addr ip[2]; /* Big endian. */
+ struct tomoyo_group *group; /* Pointer to address group. */
+ bool is_ipv6; /* Valid only if @group == NULL. */
+};
+
+/* Structure for "path_group"/"number_group"/"address_group" directive. */
+struct tomoyo_group {
+ struct tomoyo_shared_acl_head head;
+ const struct tomoyo_path_info *group_name;
+ struct list_head member_list;
+};
+
+/* Structure for "path_group" directive. */
+struct tomoyo_path_group {
+ struct tomoyo_acl_head head;
+ const struct tomoyo_path_info *member_name;
+};
+
+/* Structure for "number_group" directive. */
+struct tomoyo_number_group {
+ struct tomoyo_acl_head head;
+ struct tomoyo_number_union number;
+};
+
+/* Structure for "address_group" directive. */
+struct tomoyo_address_group {
+ struct tomoyo_acl_head head;
+ /* Structure for holding an IP address. */
+ struct tomoyo_ipaddr_union address;
+};
+
+/* Subset of "struct stat". Used by conditional ACL and audit logs. */
+struct tomoyo_mini_stat {
+ kuid_t uid;
+ kgid_t gid;
+ ino_t ino;
+ umode_t mode;
+ dev_t dev;
+ dev_t rdev;
+};
+
+/* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
+struct tomoyo_page_dump {
+ struct page *page; /* Previously dumped page. */
+ char *data; /* Contents of "page". Size is PAGE_SIZE. */
+};
+
+/* Structure for attribute checks in addition to pathname checks. */
+struct tomoyo_obj_info {
+ /*
+ * True if tomoyo_get_attributes() was already called, false otherwise.
+ */
+ bool validate_done;
+ /* True if @stat[] is valid. */
+ bool stat_valid[TOMOYO_MAX_PATH_STAT];
+ /* First pathname. Initialized with { NULL, NULL } if no path. */
+ struct path path1;
+ /* Second pathname. Initialized with { NULL, NULL } if no path. */
+ struct path path2;
+ /*
+ * Information on @path1, @path1's parent directory, @path2, @path2's
+ * parent directory.
+ */
+ struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
+ /*
+ * Content of symbolic link to be created. NULL for operations other
+ * than symlink().
+ */
+ struct tomoyo_path_info *symlink_target;
+};
+
+/* Structure for argv[]. */
+struct tomoyo_argv {
+ unsigned long index;
+ const struct tomoyo_path_info *value;
+ bool is_not;
+};
+
+/* Structure for envp[]. */
+struct tomoyo_envp {
+ const struct tomoyo_path_info *name;
+ const struct tomoyo_path_info *value;
+ bool is_not;
+};
+
+/* Structure for execve() operation. */
+struct tomoyo_execve {
+ struct tomoyo_request_info r;
+ struct tomoyo_obj_info obj;
+ struct linux_binprm *bprm;
+ const struct tomoyo_path_info *transition;
+ /* For dumping argv[] and envp[]. */
+ struct tomoyo_page_dump dump;
+ /* For temporary use. */
+ char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
+};
+
+/* Structure for entries which follows "struct tomoyo_condition". */
+struct tomoyo_condition_element {
+ /*
+ * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
+ * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
+ * of the array of this struct.
+ */
+ u8 left;
+ /*
+ * Right hand operand. A "struct tomoyo_number_union" for
+ * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
+ * TOMOYO_NAME_UNION is attached to the tail of the array of this
+ * struct.
+ */
+ u8 right;
+ /* Equation operator. True if equals or overlaps, false otherwise. */
+ bool equals;
+};
+
+/* Structure for optional arguments. */
+struct tomoyo_condition {
+ struct tomoyo_shared_acl_head head;
+ u32 size; /* Memory size allocated for this entry. */
+ u16 condc; /* Number of conditions in this struct. */
+ u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
+ u16 names_count; /* Number of "struct tomoyo_name_union names". */
+ u16 argc; /* Number of "struct tomoyo_argv". */
+ u16 envc; /* Number of "struct tomoyo_envp". */
+ u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
+ const struct tomoyo_path_info *transit; /* Maybe NULL. */
+ /*
+ * struct tomoyo_condition_element condition[condc];
+ * struct tomoyo_number_union values[numbers_count];
+ * struct tomoyo_name_union names[names_count];
+ * struct tomoyo_argv argv[argc];
+ * struct tomoyo_envp envp[envc];
+ */
+};
+
+/* Common header for individual entries. */
+struct tomoyo_acl_info {
+ struct list_head list;
+ struct tomoyo_condition *cond; /* Maybe NULL. */
+ s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
+ u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
+} __packed;
+
+/* Structure for domain information. */
+struct tomoyo_domain_info {
+ struct list_head list;
+ struct list_head acl_info_list;
+ /* Name of this domain. Never NULL. */
+ const struct tomoyo_path_info *domainname;
+ /* Namespace for this domain. Never NULL. */
+ struct tomoyo_policy_namespace *ns;
+ /* Group numbers to use. */
+ unsigned long group[TOMOYO_MAX_ACL_GROUPS / BITS_PER_LONG];
+ u8 profile; /* Profile number to use. */
+ bool is_deleted; /* Delete flag. */
+ bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
+ atomic_t users; /* Number of referring tasks. */
+};
+
+/*
+ * Structure for "task manual_domain_transition" directive.
+ */
+struct tomoyo_task_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
+ /* Pointer to domainname. */
+ const struct tomoyo_path_info *domainname;
+};
+
+/*
+ * Structure for "file execute", "file read", "file write", "file append",
+ * "file unlink", "file getattr", "file rmdir", "file truncate",
+ * "file symlink", "file chroot" and "file unmount" directive.
+ */
+struct tomoyo_path_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
+ u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
+ struct tomoyo_name_union name;
+};
+
+/*
+ * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
+ * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
+ */
+struct tomoyo_path_number_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
+ /* Bitmask of values in "enum tomoyo_path_number_acl_index". */
+ u8 perm;
+ struct tomoyo_name_union name;
+ struct tomoyo_number_union number;
+};
+
+/* Structure for "file mkblock" and "file mkchar" directive. */
+struct tomoyo_mkdev_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
+ u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
+ struct tomoyo_name_union name;
+ struct tomoyo_number_union mode;
+ struct tomoyo_number_union major;
+ struct tomoyo_number_union minor;
+};
+
+/*
+ * Structure for "file rename", "file link" and "file pivot_root" directive.
+ */
+struct tomoyo_path2_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
+ u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
+ struct tomoyo_name_union name1;
+ struct tomoyo_name_union name2;
+};
+
+/* Structure for "file mount" directive. */
+struct tomoyo_mount_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
+ struct tomoyo_name_union dev_name;
+ struct tomoyo_name_union dir_name;
+ struct tomoyo_name_union fs_type;
+ struct tomoyo_number_union flags;
+};
+
+/* Structure for "misc env" directive in domain policy. */
+struct tomoyo_env_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_ENV_ACL */
+ const struct tomoyo_path_info *env; /* environment variable */
+};
+
+/* Structure for "network inet" directive. */
+struct tomoyo_inet_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
+ u8 protocol;
+ u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
+ struct tomoyo_ipaddr_union address;
+ struct tomoyo_number_union port;
+};
+
+/* Structure for "network unix" directive. */
+struct tomoyo_unix_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
+ u8 protocol;
+ u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
+ struct tomoyo_name_union name;
+};
+
+/* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
+struct tomoyo_acl_param {
+ char *data;
+ struct list_head *list;
+ struct tomoyo_policy_namespace *ns;
+ bool is_delete;
+};
+
+#define TOMOYO_MAX_IO_READ_QUEUE 64
+
+/*
+ * Structure for reading/writing policy via /sys/kernel/security/tomoyo
+ * interfaces.
+ */
+struct tomoyo_io_buffer {
+ void (*read)(struct tomoyo_io_buffer *head);
+ int (*write)(struct tomoyo_io_buffer *head);
+ __poll_t (*poll)(struct file *file, poll_table *wait);
+ /* Exclusive lock for this structure. */
+ struct mutex io_sem;
+ char __user *read_user_buf;
+ size_t read_user_buf_avail;
+ struct {
+ struct list_head *ns;
+ struct list_head *domain;
+ struct list_head *group;
+ struct list_head *acl;
+ size_t avail;
+ unsigned int step;
+ unsigned int query_index;
+ u16 index;
+ u16 cond_index;
+ u8 acl_group_index;
+ u8 cond_step;
+ u8 bit;
+ u8 w_pos;
+ bool eof;
+ bool print_this_domain_only;
+ bool print_transition_related_only;
+ bool print_cond_part;
+ const char *w[TOMOYO_MAX_IO_READ_QUEUE];
+ } r;
+ struct {
+ struct tomoyo_policy_namespace *ns;
+ /* The position currently writing to. */
+ struct tomoyo_domain_info *domain;
+ /* Bytes available for writing. */
+ size_t avail;
+ bool is_delete;
+ } w;
+ /* Buffer for reading. */
+ char *read_buf;
+ /* Size of read buffer. */
+ size_t readbuf_size;
+ /* Buffer for writing. */
+ char *write_buf;
+ /* Size of write buffer. */
+ size_t writebuf_size;
+ /* Type of this interface. */
+ enum tomoyo_securityfs_interface_index type;
+ /* Users counter protected by tomoyo_io_buffer_list_lock. */
+ u8 users;
+ /* List for telling GC not to kfree() elements. */
+ struct list_head list;
+};
+
+/*
+ * Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
+ * "no_keep_domain" keyword.
+ */
+struct tomoyo_transition_control {
+ struct tomoyo_acl_head head;
+ u8 type; /* One of values in "enum tomoyo_transition_type". */
+ /* True if the domainname is tomoyo_get_last_name(). */
+ bool is_last_name;
+ const struct tomoyo_path_info *domainname; /* Maybe NULL */
+ const struct tomoyo_path_info *program; /* Maybe NULL */
+};
+
+/* Structure for "aggregator" keyword. */
+struct tomoyo_aggregator {
+ struct tomoyo_acl_head head;
+ const struct tomoyo_path_info *original_name;
+ const struct tomoyo_path_info *aggregated_name;
+};
+
+/* Structure for policy manager. */
+struct tomoyo_manager {
+ struct tomoyo_acl_head head;
+ /* A path to program or a domainname. */
+ const struct tomoyo_path_info *manager;
+};
+
+struct tomoyo_preference {
+ unsigned int learning_max_entry;
+ bool enforcing_verbose;
+ bool learning_verbose;
+ bool permissive_verbose;
+};
+
+/* Structure for /sys/kernel/security/tomnoyo/profile interface. */
+struct tomoyo_profile {
+ const struct tomoyo_path_info *comment;
+ struct tomoyo_preference *learning;
+ struct tomoyo_preference *permissive;
+ struct tomoyo_preference *enforcing;
+ struct tomoyo_preference preference;
+ u8 default_config;
+ u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
+ unsigned int pref[TOMOYO_MAX_PREF];
+};
+
+/* Structure for representing YYYY/MM/DD hh/mm/ss. */
+struct tomoyo_time {
+ u16 year;
+ u8 month;
+ u8 day;
+ u8 hour;
+ u8 min;
+ u8 sec;
+};
+
+/* Structure for policy namespace. */
+struct tomoyo_policy_namespace {
+ /* Profile table. Memory is allocated as needed. */
+ struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
+ /* List of "struct tomoyo_group". */
+ struct list_head group_list[TOMOYO_MAX_GROUP];
+ /* List of policy. */
+ struct list_head policy_list[TOMOYO_MAX_POLICY];
+ /* The global ACL referred by "use_group" keyword. */
+ struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
+ /* List for connecting to tomoyo_namespace_list list. */
+ struct list_head namespace_list;
+ /* Profile version. Currently only 20150505 is defined. */
+ unsigned int profile_version;
+ /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
+ const char *name;
+};
+
+/* Structure for "struct task_struct"->security. */
+struct tomoyo_task {
+ struct tomoyo_domain_info *domain_info;
+ struct tomoyo_domain_info *old_domain_info;
+};
+
+/********** Function prototypes. **********/
+
+bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
+ const struct tomoyo_group *group);
+bool tomoyo_compare_number_union(const unsigned long value,
+ const struct tomoyo_number_union *ptr);
+bool tomoyo_condition(struct tomoyo_request_info *r,
+ const struct tomoyo_condition *cond);
+bool tomoyo_correct_domain(const unsigned char *domainname);
+bool tomoyo_correct_path(const char *filename);
+bool tomoyo_correct_word(const char *string);
+bool tomoyo_domain_def(const unsigned char *buffer);
+bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
+bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
+ struct tomoyo_page_dump *dump);
+bool tomoyo_memory_ok(void *ptr);
+bool tomoyo_number_matches_group(const unsigned long min,
+ const unsigned long max,
+ const struct tomoyo_group *group);
+bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
+ struct tomoyo_ipaddr_union *ptr);
+bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
+ struct tomoyo_name_union *ptr);
+bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
+ struct tomoyo_number_union *ptr);
+bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
+ const struct tomoyo_path_info *pattern);
+bool tomoyo_permstr(const char *string, const char *keyword);
+bool tomoyo_str_starts(char **src, const char *find);
+char *tomoyo_encode(const char *str);
+char *tomoyo_encode2(const char *str, int str_len);
+char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
+ va_list args);
+char *tomoyo_read_token(struct tomoyo_acl_param *param);
+char *tomoyo_realpath_from_path(const struct path *path);
+char *tomoyo_realpath_nofollow(const char *pathname);
+const char *tomoyo_get_exe(void);
+const char *tomoyo_yesno(const unsigned int value);
+const struct tomoyo_path_info *tomoyo_compare_name_union
+(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
+const struct tomoyo_path_info *tomoyo_get_domainname
+(struct tomoyo_acl_param *param);
+const struct tomoyo_path_info *tomoyo_get_name(const char *name);
+const struct tomoyo_path_info *tomoyo_path_matches_group
+(const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
+int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
+ const struct path *path, const int flag);
+void tomoyo_close_control(struct tomoyo_io_buffer *head);
+int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
+int tomoyo_execute_permission(struct tomoyo_request_info *r,
+ const struct tomoyo_path_info *filename);
+int tomoyo_find_next_domain(struct linux_binprm *bprm);
+int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
+ const u8 index);
+int tomoyo_init_request_info(struct tomoyo_request_info *r,
+ struct tomoyo_domain_info *domain,
+ const u8 index);
+int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
+ const unsigned int mode, unsigned int dev);
+int tomoyo_mount_permission(const char *dev_name, const struct path *path,
+ const char *type, unsigned long flags,
+ void *data_page);
+int tomoyo_open_control(const u8 type, struct file *file);
+int tomoyo_path2_perm(const u8 operation, const struct path *path1,
+ const struct path *path2);
+int tomoyo_path_number_perm(const u8 operation, const struct path *path,
+ unsigned long number);
+int tomoyo_path_perm(const u8 operation, const struct path *path,
+ const char *target);
+__poll_t tomoyo_poll_control(struct file *file, poll_table *wait);
+__poll_t tomoyo_poll_log(struct file *file, poll_table *wait);
+int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
+ int addr_len);
+int tomoyo_socket_connect_permission(struct socket *sock,
+ struct sockaddr *addr, int addr_len);
+int tomoyo_socket_listen_permission(struct socket *sock);
+int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
+ int size);
+int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
+ __printf(2, 3);
+int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
+ struct tomoyo_acl_param *param,
+ bool (*check_duplicate)
+ (const struct tomoyo_acl_info *,
+ const struct tomoyo_acl_info *),
+ bool (*merge_duplicate)
+ (struct tomoyo_acl_info *, struct tomoyo_acl_info *,
+ const bool));
+int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
+ struct tomoyo_acl_param *param,
+ bool (*check_duplicate)
+ (const struct tomoyo_acl_head *,
+ const struct tomoyo_acl_head *));
+int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
+int tomoyo_write_file(struct tomoyo_acl_param *param);
+int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
+int tomoyo_write_misc(struct tomoyo_acl_param *param);
+int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
+int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
+ const u8 type);
+int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
+ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
+ const int buffer_len);
+ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
+ const char __user *buffer, const int buffer_len);
+struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
+struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
+ const bool transit);
+struct tomoyo_domain_info *tomoyo_domain(void);
+struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
+struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
+ const u8 idx);
+struct tomoyo_policy_namespace *tomoyo_assign_namespace
+(const char *domainname);
+struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
+ const u8 profile);
+unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
+ const u8 index);
+u8 tomoyo_parse_ulong(unsigned long *result, char **str);
+void *tomoyo_commit_ok(void *data, const unsigned int size);
+void __init tomoyo_load_builtin_policy(void);
+void __init tomoyo_mm_init(void);
+void tomoyo_check_acl(struct tomoyo_request_info *r,
+ bool (*check_entry)(struct tomoyo_request_info *,
+ const struct tomoyo_acl_info *));
+void tomoyo_check_profile(void);
+void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
+void tomoyo_del_condition(struct list_head *element);
+void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
+void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
+void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
+void tomoyo_load_policy(const char *filename);
+void tomoyo_normalize_line(unsigned char *buffer);
+void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
+void tomoyo_print_ip(char *buf, const unsigned int size,
+ const struct tomoyo_ipaddr_union *ptr);
+void tomoyo_print_ulong(char *buffer, const int buffer_len,
+ const unsigned long value, const u8 type);
+void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
+void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
+void tomoyo_read_log(struct tomoyo_io_buffer *head);
+void tomoyo_update_stat(const u8 index);
+void tomoyo_warn_oom(const char *function);
+void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
+ __printf(2, 3);
+void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
+ va_list args);
+
+/********** External variable definitions. **********/
+
+extern bool tomoyo_policy_loaded;
+extern int tomoyo_enabled;
+extern const char * const tomoyo_condition_keyword
+[TOMOYO_MAX_CONDITION_KEYWORD];
+extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
+extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX];
+extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
+extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
+extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
+extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
+extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
+extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
+extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
+extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
+extern struct list_head tomoyo_condition_list;
+extern struct list_head tomoyo_domain_list;
+extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
+extern struct list_head tomoyo_namespace_list;
+extern struct mutex tomoyo_policy_lock;
+extern struct srcu_struct tomoyo_ss;
+extern struct tomoyo_domain_info tomoyo_kernel_domain;
+extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
+extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
+extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
+extern struct lsm_blob_sizes tomoyo_blob_sizes;
+
+/********** Inlined functions. **********/
+
+/**
+ * tomoyo_read_lock - Take lock for protecting policy.
+ *
+ * Returns index number for tomoyo_read_unlock().
+ */
+static inline int tomoyo_read_lock(void)
+{
+ return srcu_read_lock(&tomoyo_ss);
+}
+
+/**
+ * tomoyo_read_unlock - Release lock for protecting policy.
+ *
+ * @idx: Index number returned by tomoyo_read_lock().
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_read_unlock(int idx)
+{
+ srcu_read_unlock(&tomoyo_ss, idx);
+}
+
+/**
+ * tomoyo_sys_getppid - Copy of getppid().
+ *
+ * Returns parent process's PID.
+ *
+ * Alpha does not have getppid() defined. To be able to build this module on
+ * Alpha, I have to copy getppid() from kernel/timer.c.
+ */
+static inline pid_t tomoyo_sys_getppid(void)
+{
+ pid_t pid;
+
+ rcu_read_lock();
+ pid = task_tgid_vnr(rcu_dereference(current->real_parent));
+ rcu_read_unlock();
+ return pid;
+}
+
+/**
+ * tomoyo_sys_getpid - Copy of getpid().
+ *
+ * Returns current thread's PID.
+ *
+ * Alpha does not have getpid() defined. To be able to build this module on
+ * Alpha, I have to copy getpid() from kernel/timer.c.
+ */
+static inline pid_t tomoyo_sys_getpid(void)
+{
+ return task_tgid_vnr(current);
+}
+
+/**
+ * tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
+ *
+ * @a: Pointer to "struct tomoyo_path_info".
+ * @b: Pointer to "struct tomoyo_path_info".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
+ const struct tomoyo_path_info *b)
+{
+ return a->hash != b->hash || strcmp(a->name, b->name);
+}
+
+/**
+ * tomoyo_put_name - Drop reference on "struct tomoyo_name".
+ *
+ * @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
+{
+ if (name) {
+ struct tomoyo_name *ptr =
+ container_of(name, typeof(*ptr), entry);
+ atomic_dec(&ptr->head.users);
+ }
+}
+
+/**
+ * tomoyo_put_condition - Drop reference on "struct tomoyo_condition".
+ *
+ * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
+{
+ if (cond)
+ atomic_dec(&cond->head.users);
+}
+
+/**
+ * tomoyo_put_group - Drop reference on "struct tomoyo_group".
+ *
+ * @group: Pointer to "struct tomoyo_group". Maybe NULL.
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_put_group(struct tomoyo_group *group)
+{
+ if (group)
+ atomic_dec(&group->head.users);
+}
+
+/**
+ * tomoyo_task - Get "struct tomoyo_task" for specified thread.
+ *
+ * @task - Pointer to "struct task_struct".
+ *
+ * Returns pointer to "struct tomoyo_task" for specified thread.
+ */
+static inline struct tomoyo_task *tomoyo_task(struct task_struct *task)
+{
+ return task->security + tomoyo_blob_sizes.lbs_task;
+}
+
+/**
+ * tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
+ *
+ * @a: Pointer to "struct tomoyo_name_union".
+ * @b: Pointer to "struct tomoyo_name_union".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static inline bool tomoyo_same_name_union
+(const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
+{
+ return a->filename == b->filename && a->group == b->group;
+}
+
+/**
+ * tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
+ *
+ * @a: Pointer to "struct tomoyo_number_union".
+ * @b: Pointer to "struct tomoyo_number_union".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static inline bool tomoyo_same_number_union
+(const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
+{
+ return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
+ a->group == b->group && a->value_type[0] == b->value_type[0] &&
+ a->value_type[1] == b->value_type[1];
+}
+
+/**
+ * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
+ *
+ * @a: Pointer to "struct tomoyo_ipaddr_union".
+ * @b: Pointer to "struct tomoyo_ipaddr_union".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static inline bool tomoyo_same_ipaddr_union
+(const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
+{
+ return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
+ a->is_ipv6 == b->is_ipv6;
+}
+
+/**
+ * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
+ *
+ * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
+ */
+static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
+{
+ return tomoyo_domain()->ns;
+}
+
+#if defined(CONFIG_SLOB)
+
+/**
+ * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
+ *
+ * @size: Size to be rounded up.
+ *
+ * Returns @size.
+ *
+ * Since SLOB does not round up, this function simply returns @size.
+ */
+static inline int tomoyo_round2(size_t size)
+{
+ return size;
+}
+
+#else
+
+/**
+ * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
+ *
+ * @size: Size to be rounded up.
+ *
+ * Returns rounded size.
+ *
+ * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
+ * (e.g.) 128 bytes.
+ */
+static inline int tomoyo_round2(size_t size)
+{
+#if PAGE_SIZE == 4096
+ size_t bsize = 32;
+#else
+ size_t bsize = 64;
+#endif
+ if (!size)
+ return 0;
+ while (size > bsize)
+ bsize <<= 1;
+ return bsize;
+}
+
+#endif
+
+/**
+ * list_for_each_cookie - iterate over a list with cookie.
+ * @pos: the &struct list_head to use as a loop cursor.
+ * @head: the head for your list.
+ */
+#define list_for_each_cookie(pos, head) \
+ if (!pos) \
+ pos = srcu_dereference((head)->next, &tomoyo_ss); \
+ for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
+
+#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
diff --git a/security/tomoyo/condition.c b/security/tomoyo/condition.c
new file mode 100644
index 000000000..8f6d57c15
--- /dev/null
+++ b/security/tomoyo/condition.c
@@ -0,0 +1,1122 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/condition.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+#include <linux/slab.h>
+
+/* List of "struct tomoyo_condition". */
+LIST_HEAD(tomoyo_condition_list);
+
+/**
+ * tomoyo_argv - Check argv[] in "struct linux_binbrm".
+ *
+ * @index: Index number of @arg_ptr.
+ * @arg_ptr: Contents of argv[@index].
+ * @argc: Length of @argv.
+ * @argv: Pointer to "struct tomoyo_argv".
+ * @checked: Set to true if @argv[@index] was found.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_argv(const unsigned int index, const char *arg_ptr,
+ const int argc, const struct tomoyo_argv *argv,
+ u8 *checked)
+{
+ int i;
+ struct tomoyo_path_info arg;
+
+ arg.name = arg_ptr;
+ for (i = 0; i < argc; argv++, checked++, i++) {
+ bool result;
+
+ if (index != argv->index)
+ continue;
+ *checked = 1;
+ tomoyo_fill_path_info(&arg);
+ result = tomoyo_path_matches_pattern(&arg, argv->value);
+ if (argv->is_not)
+ result = !result;
+ if (!result)
+ return false;
+ }
+ return true;
+}
+
+/**
+ * tomoyo_envp - Check envp[] in "struct linux_binbrm".
+ *
+ * @env_name: The name of environment variable.
+ * @env_value: The value of environment variable.
+ * @envc: Length of @envp.
+ * @envp: Pointer to "struct tomoyo_envp".
+ * @checked: Set to true if @envp[@env_name] was found.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_envp(const char *env_name, const char *env_value,
+ const int envc, const struct tomoyo_envp *envp,
+ u8 *checked)
+{
+ int i;
+ struct tomoyo_path_info name;
+ struct tomoyo_path_info value;
+
+ name.name = env_name;
+ tomoyo_fill_path_info(&name);
+ value.name = env_value;
+ tomoyo_fill_path_info(&value);
+ for (i = 0; i < envc; envp++, checked++, i++) {
+ bool result;
+
+ if (!tomoyo_path_matches_pattern(&name, envp->name))
+ continue;
+ *checked = 1;
+ if (envp->value) {
+ result = tomoyo_path_matches_pattern(&value,
+ envp->value);
+ if (envp->is_not)
+ result = !result;
+ } else {
+ result = true;
+ if (!envp->is_not)
+ result = !result;
+ }
+ if (!result)
+ return false;
+ }
+ return true;
+}
+
+/**
+ * tomoyo_scan_bprm - Scan "struct linux_binprm".
+ *
+ * @ee: Pointer to "struct tomoyo_execve".
+ * @argc: Length of @argc.
+ * @argv: Pointer to "struct tomoyo_argv".
+ * @envc: Length of @envp.
+ * @envp: Poiner to "struct tomoyo_envp".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_scan_bprm(struct tomoyo_execve *ee,
+ const u16 argc, const struct tomoyo_argv *argv,
+ const u16 envc, const struct tomoyo_envp *envp)
+{
+ struct linux_binprm *bprm = ee->bprm;
+ struct tomoyo_page_dump *dump = &ee->dump;
+ char *arg_ptr = ee->tmp;
+ int arg_len = 0;
+ unsigned long pos = bprm->p;
+ int offset = pos % PAGE_SIZE;
+ int argv_count = bprm->argc;
+ int envp_count = bprm->envc;
+ bool result = true;
+ u8 local_checked[32];
+ u8 *checked;
+
+ if (argc + envc <= sizeof(local_checked)) {
+ checked = local_checked;
+ memset(local_checked, 0, sizeof(local_checked));
+ } else {
+ checked = kzalloc(argc + envc, GFP_NOFS);
+ if (!checked)
+ return false;
+ }
+ while (argv_count || envp_count) {
+ if (!tomoyo_dump_page(bprm, pos, dump)) {
+ result = false;
+ goto out;
+ }
+ pos += PAGE_SIZE - offset;
+ while (offset < PAGE_SIZE) {
+ /* Read. */
+ const char *kaddr = dump->data;
+ const unsigned char c = kaddr[offset++];
+
+ if (c && arg_len < TOMOYO_EXEC_TMPSIZE - 10) {
+ if (c == '\\') {
+ arg_ptr[arg_len++] = '\\';
+ arg_ptr[arg_len++] = '\\';
+ } else if (c > ' ' && c < 127) {
+ arg_ptr[arg_len++] = c;
+ } else {
+ arg_ptr[arg_len++] = '\\';
+ arg_ptr[arg_len++] = (c >> 6) + '0';
+ arg_ptr[arg_len++] =
+ ((c >> 3) & 7) + '0';
+ arg_ptr[arg_len++] = (c & 7) + '0';
+ }
+ } else {
+ arg_ptr[arg_len] = '\0';
+ }
+ if (c)
+ continue;
+ /* Check. */
+ if (argv_count) {
+ if (!tomoyo_argv(bprm->argc - argv_count,
+ arg_ptr, argc, argv,
+ checked)) {
+ result = false;
+ break;
+ }
+ argv_count--;
+ } else if (envp_count) {
+ char *cp = strchr(arg_ptr, '=');
+
+ if (cp) {
+ *cp = '\0';
+ if (!tomoyo_envp(arg_ptr, cp + 1,
+ envc, envp,
+ checked + argc)) {
+ result = false;
+ break;
+ }
+ }
+ envp_count--;
+ } else {
+ break;
+ }
+ arg_len = 0;
+ }
+ offset = 0;
+ if (!result)
+ break;
+ }
+out:
+ if (result) {
+ int i;
+
+ /* Check not-yet-checked entries. */
+ for (i = 0; i < argc; i++) {
+ if (checked[i])
+ continue;
+ /*
+ * Return true only if all unchecked indexes in
+ * bprm->argv[] are not matched.
+ */
+ if (argv[i].is_not)
+ continue;
+ result = false;
+ break;
+ }
+ for (i = 0; i < envc; envp++, i++) {
+ if (checked[argc + i])
+ continue;
+ /*
+ * Return true only if all unchecked environ variables
+ * in bprm->envp[] are either undefined or not matched.
+ */
+ if ((!envp->value && !envp->is_not) ||
+ (envp->value && envp->is_not))
+ continue;
+ result = false;
+ break;
+ }
+ }
+ if (checked != local_checked)
+ kfree(checked);
+ return result;
+}
+
+/**
+ * tomoyo_scan_exec_realpath - Check "exec.realpath" parameter of "struct tomoyo_condition".
+ *
+ * @file: Pointer to "struct file".
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ * @match: True if "exec.realpath=", false if "exec.realpath!=".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_scan_exec_realpath(struct file *file,
+ const struct tomoyo_name_union *ptr,
+ const bool match)
+{
+ bool result;
+ struct tomoyo_path_info exe;
+
+ if (!file)
+ return false;
+ exe.name = tomoyo_realpath_from_path(&file->f_path);
+ if (!exe.name)
+ return false;
+ tomoyo_fill_path_info(&exe);
+ result = tomoyo_compare_name_union(&exe, ptr);
+ kfree(exe.name);
+ return result == match;
+}
+
+/**
+ * tomoyo_get_dqword - tomoyo_get_name() for a quoted string.
+ *
+ * @start: String to save.
+ *
+ * Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
+ */
+static const struct tomoyo_path_info *tomoyo_get_dqword(char *start)
+{
+ char *cp = start + strlen(start) - 1;
+
+ if (cp == start || *start++ != '"' || *cp != '"')
+ return NULL;
+ *cp = '\0';
+ if (*start && !tomoyo_correct_word(start))
+ return NULL;
+ return tomoyo_get_name(start);
+}
+
+/**
+ * tomoyo_parse_name_union_quoted - Parse a quoted word.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_parse_name_union_quoted(struct tomoyo_acl_param *param,
+ struct tomoyo_name_union *ptr)
+{
+ char *filename = param->data;
+
+ if (*filename == '@')
+ return tomoyo_parse_name_union(param, ptr);
+ ptr->filename = tomoyo_get_dqword(filename);
+ return ptr->filename != NULL;
+}
+
+/**
+ * tomoyo_parse_argv - Parse an argv[] condition part.
+ *
+ * @left: Lefthand value.
+ * @right: Righthand value.
+ * @argv: Pointer to "struct tomoyo_argv".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_parse_argv(char *left, char *right,
+ struct tomoyo_argv *argv)
+{
+ if (tomoyo_parse_ulong(&argv->index, &left) !=
+ TOMOYO_VALUE_TYPE_DECIMAL || *left++ != ']' || *left)
+ return false;
+ argv->value = tomoyo_get_dqword(right);
+ return argv->value != NULL;
+}
+
+/**
+ * tomoyo_parse_envp - Parse an envp[] condition part.
+ *
+ * @left: Lefthand value.
+ * @right: Righthand value.
+ * @envp: Pointer to "struct tomoyo_envp".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_parse_envp(char *left, char *right,
+ struct tomoyo_envp *envp)
+{
+ const struct tomoyo_path_info *name;
+ const struct tomoyo_path_info *value;
+ char *cp = left + strlen(left) - 1;
+
+ if (*cp-- != ']' || *cp != '"')
+ goto out;
+ *cp = '\0';
+ if (!tomoyo_correct_word(left))
+ goto out;
+ name = tomoyo_get_name(left);
+ if (!name)
+ goto out;
+ if (!strcmp(right, "NULL")) {
+ value = NULL;
+ } else {
+ value = tomoyo_get_dqword(right);
+ if (!value) {
+ tomoyo_put_name(name);
+ goto out;
+ }
+ }
+ envp->name = name;
+ envp->value = value;
+ return true;
+out:
+ return false;
+}
+
+/**
+ * tomoyo_same_condition - Check for duplicated "struct tomoyo_condition" entry.
+ *
+ * @a: Pointer to "struct tomoyo_condition".
+ * @b: Pointer to "struct tomoyo_condition".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static inline bool tomoyo_same_condition(const struct tomoyo_condition *a,
+ const struct tomoyo_condition *b)
+{
+ return a->size == b->size && a->condc == b->condc &&
+ a->numbers_count == b->numbers_count &&
+ a->names_count == b->names_count &&
+ a->argc == b->argc && a->envc == b->envc &&
+ a->grant_log == b->grant_log && a->transit == b->transit &&
+ !memcmp(a + 1, b + 1, a->size - sizeof(*a));
+}
+
+/**
+ * tomoyo_condition_type - Get condition type.
+ *
+ * @word: Keyword string.
+ *
+ * Returns one of values in "enum tomoyo_conditions_index" on success,
+ * TOMOYO_MAX_CONDITION_KEYWORD otherwise.
+ */
+static u8 tomoyo_condition_type(const char *word)
+{
+ u8 i;
+
+ for (i = 0; i < TOMOYO_MAX_CONDITION_KEYWORD; i++) {
+ if (!strcmp(word, tomoyo_condition_keyword[i]))
+ break;
+ }
+ return i;
+}
+
+/* Define this to enable debug mode. */
+/* #define DEBUG_CONDITION */
+
+#ifdef DEBUG_CONDITION
+#define dprintk printk
+#else
+#define dprintk(...) do { } while (0)
+#endif
+
+/**
+ * tomoyo_commit_condition - Commit "struct tomoyo_condition".
+ *
+ * @entry: Pointer to "struct tomoyo_condition".
+ *
+ * Returns pointer to "struct tomoyo_condition" on success, NULL otherwise.
+ *
+ * This function merges duplicated entries. This function returns NULL if
+ * @entry is not duplicated but memory quota for policy has exceeded.
+ */
+static struct tomoyo_condition *tomoyo_commit_condition
+(struct tomoyo_condition *entry)
+{
+ struct tomoyo_condition *ptr;
+ bool found = false;
+
+ if (mutex_lock_interruptible(&tomoyo_policy_lock)) {
+ dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__);
+ ptr = NULL;
+ found = true;
+ goto out;
+ }
+ list_for_each_entry(ptr, &tomoyo_condition_list, head.list) {
+ if (!tomoyo_same_condition(ptr, entry) ||
+ atomic_read(&ptr->head.users) == TOMOYO_GC_IN_PROGRESS)
+ continue;
+ /* Same entry found. Share this entry. */
+ atomic_inc(&ptr->head.users);
+ found = true;
+ break;
+ }
+ if (!found) {
+ if (tomoyo_memory_ok(entry)) {
+ atomic_set(&entry->head.users, 1);
+ list_add(&entry->head.list, &tomoyo_condition_list);
+ } else {
+ found = true;
+ ptr = NULL;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+out:
+ if (found) {
+ tomoyo_del_condition(&entry->head.list);
+ kfree(entry);
+ entry = ptr;
+ }
+ return entry;
+}
+
+/**
+ * tomoyo_get_transit_preference - Parse domain transition preference for execve().
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @e: Pointer to "struct tomoyo_condition".
+ *
+ * Returns the condition string part.
+ */
+static char *tomoyo_get_transit_preference(struct tomoyo_acl_param *param,
+ struct tomoyo_condition *e)
+{
+ char * const pos = param->data;
+ bool flag;
+
+ if (*pos == '<') {
+ e->transit = tomoyo_get_domainname(param);
+ goto done;
+ }
+ {
+ char *cp = strchr(pos, ' ');
+
+ if (cp)
+ *cp = '\0';
+ flag = tomoyo_correct_path(pos) || !strcmp(pos, "keep") ||
+ !strcmp(pos, "initialize") || !strcmp(pos, "reset") ||
+ !strcmp(pos, "child") || !strcmp(pos, "parent");
+ if (cp)
+ *cp = ' ';
+ }
+ if (!flag)
+ return pos;
+ e->transit = tomoyo_get_name(tomoyo_read_token(param));
+done:
+ if (e->transit)
+ return param->data;
+ /*
+ * Return a bad read-only condition string that will let
+ * tomoyo_get_condition() return NULL.
+ */
+ return "/";
+}
+
+/**
+ * tomoyo_get_condition - Parse condition part.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns pointer to "struct tomoyo_condition" on success, NULL otherwise.
+ */
+struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param)
+{
+ struct tomoyo_condition *entry = NULL;
+ struct tomoyo_condition_element *condp = NULL;
+ struct tomoyo_number_union *numbers_p = NULL;
+ struct tomoyo_name_union *names_p = NULL;
+ struct tomoyo_argv *argv = NULL;
+ struct tomoyo_envp *envp = NULL;
+ struct tomoyo_condition e = { };
+ char * const start_of_string =
+ tomoyo_get_transit_preference(param, &e);
+ char * const end_of_string = start_of_string + strlen(start_of_string);
+ char *pos;
+
+rerun:
+ pos = start_of_string;
+ while (1) {
+ u8 left = -1;
+ u8 right = -1;
+ char *left_word = pos;
+ char *cp;
+ char *right_word;
+ bool is_not;
+
+ if (!*left_word)
+ break;
+ /*
+ * Since left-hand condition does not allow use of "path_group"
+ * or "number_group" and environment variable's names do not
+ * accept '=', it is guaranteed that the original line consists
+ * of one or more repetition of $left$operator$right blocks
+ * where "$left is free from '=' and ' '" and "$operator is
+ * either '=' or '!='" and "$right is free from ' '".
+ * Therefore, we can reconstruct the original line at the end
+ * of dry run even if we overwrite $operator with '\0'.
+ */
+ cp = strchr(pos, ' ');
+ if (cp) {
+ *cp = '\0'; /* Will restore later. */
+ pos = cp + 1;
+ } else {
+ pos = "";
+ }
+ right_word = strchr(left_word, '=');
+ if (!right_word || right_word == left_word)
+ goto out;
+ is_not = *(right_word - 1) == '!';
+ if (is_not)
+ *(right_word++ - 1) = '\0'; /* Will restore later. */
+ else if (*(right_word + 1) != '=')
+ *right_word++ = '\0'; /* Will restore later. */
+ else
+ goto out;
+ dprintk(KERN_WARNING "%u: <%s>%s=<%s>\n", __LINE__, left_word,
+ is_not ? "!" : "", right_word);
+ if (!strcmp(left_word, "grant_log")) {
+ if (entry) {
+ if (is_not ||
+ entry->grant_log != TOMOYO_GRANTLOG_AUTO)
+ goto out;
+ else if (!strcmp(right_word, "yes"))
+ entry->grant_log = TOMOYO_GRANTLOG_YES;
+ else if (!strcmp(right_word, "no"))
+ entry->grant_log = TOMOYO_GRANTLOG_NO;
+ else
+ goto out;
+ }
+ continue;
+ }
+ if (!strncmp(left_word, "exec.argv[", 10)) {
+ if (!argv) {
+ e.argc++;
+ e.condc++;
+ } else {
+ e.argc--;
+ e.condc--;
+ left = TOMOYO_ARGV_ENTRY;
+ argv->is_not = is_not;
+ if (!tomoyo_parse_argv(left_word + 10,
+ right_word, argv++))
+ goto out;
+ }
+ goto store_value;
+ }
+ if (!strncmp(left_word, "exec.envp[\"", 11)) {
+ if (!envp) {
+ e.envc++;
+ e.condc++;
+ } else {
+ e.envc--;
+ e.condc--;
+ left = TOMOYO_ENVP_ENTRY;
+ envp->is_not = is_not;
+ if (!tomoyo_parse_envp(left_word + 11,
+ right_word, envp++))
+ goto out;
+ }
+ goto store_value;
+ }
+ left = tomoyo_condition_type(left_word);
+ dprintk(KERN_WARNING "%u: <%s> left=%u\n", __LINE__, left_word,
+ left);
+ if (left == TOMOYO_MAX_CONDITION_KEYWORD) {
+ if (!numbers_p) {
+ e.numbers_count++;
+ } else {
+ e.numbers_count--;
+ left = TOMOYO_NUMBER_UNION;
+ param->data = left_word;
+ if (*left_word == '@' ||
+ !tomoyo_parse_number_union(param,
+ numbers_p++))
+ goto out;
+ }
+ }
+ if (!condp)
+ e.condc++;
+ else
+ e.condc--;
+ if (left == TOMOYO_EXEC_REALPATH ||
+ left == TOMOYO_SYMLINK_TARGET) {
+ if (!names_p) {
+ e.names_count++;
+ } else {
+ e.names_count--;
+ right = TOMOYO_NAME_UNION;
+ param->data = right_word;
+ if (!tomoyo_parse_name_union_quoted(param,
+ names_p++))
+ goto out;
+ }
+ goto store_value;
+ }
+ right = tomoyo_condition_type(right_word);
+ if (right == TOMOYO_MAX_CONDITION_KEYWORD) {
+ if (!numbers_p) {
+ e.numbers_count++;
+ } else {
+ e.numbers_count--;
+ right = TOMOYO_NUMBER_UNION;
+ param->data = right_word;
+ if (!tomoyo_parse_number_union(param,
+ numbers_p++))
+ goto out;
+ }
+ }
+store_value:
+ if (!condp) {
+ dprintk(KERN_WARNING "%u: dry_run left=%u right=%u match=%u\n",
+ __LINE__, left, right, !is_not);
+ continue;
+ }
+ condp->left = left;
+ condp->right = right;
+ condp->equals = !is_not;
+ dprintk(KERN_WARNING "%u: left=%u right=%u match=%u\n",
+ __LINE__, condp->left, condp->right,
+ condp->equals);
+ condp++;
+ }
+ dprintk(KERN_INFO "%u: cond=%u numbers=%u names=%u ac=%u ec=%u\n",
+ __LINE__, e.condc, e.numbers_count, e.names_count, e.argc,
+ e.envc);
+ if (entry) {
+ BUG_ON(e.names_count | e.numbers_count | e.argc | e.envc |
+ e.condc);
+ return tomoyo_commit_condition(entry);
+ }
+ e.size = sizeof(*entry)
+ + e.condc * sizeof(struct tomoyo_condition_element)
+ + e.numbers_count * sizeof(struct tomoyo_number_union)
+ + e.names_count * sizeof(struct tomoyo_name_union)
+ + e.argc * sizeof(struct tomoyo_argv)
+ + e.envc * sizeof(struct tomoyo_envp);
+ entry = kzalloc(e.size, GFP_NOFS);
+ if (!entry)
+ goto out2;
+ *entry = e;
+ e.transit = NULL;
+ condp = (struct tomoyo_condition_element *) (entry + 1);
+ numbers_p = (struct tomoyo_number_union *) (condp + e.condc);
+ names_p = (struct tomoyo_name_union *) (numbers_p + e.numbers_count);
+ argv = (struct tomoyo_argv *) (names_p + e.names_count);
+ envp = (struct tomoyo_envp *) (argv + e.argc);
+ {
+ bool flag = false;
+
+ for (pos = start_of_string; pos < end_of_string; pos++) {
+ if (*pos)
+ continue;
+ if (flag) /* Restore " ". */
+ *pos = ' ';
+ else if (*(pos + 1) == '=') /* Restore "!=". */
+ *pos = '!';
+ else /* Restore "=". */
+ *pos = '=';
+ flag = !flag;
+ }
+ }
+ goto rerun;
+out:
+ dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__);
+ if (entry) {
+ tomoyo_del_condition(&entry->head.list);
+ kfree(entry);
+ }
+out2:
+ tomoyo_put_name(e.transit);
+ return NULL;
+}
+
+/**
+ * tomoyo_get_attributes - Revalidate "struct inode".
+ *
+ * @obj: Pointer to "struct tomoyo_obj_info".
+ *
+ * Returns nothing.
+ */
+void tomoyo_get_attributes(struct tomoyo_obj_info *obj)
+{
+ u8 i;
+ struct dentry *dentry = NULL;
+
+ for (i = 0; i < TOMOYO_MAX_PATH_STAT; i++) {
+ struct inode *inode;
+
+ switch (i) {
+ case TOMOYO_PATH1:
+ dentry = obj->path1.dentry;
+ if (!dentry)
+ continue;
+ break;
+ case TOMOYO_PATH2:
+ dentry = obj->path2.dentry;
+ if (!dentry)
+ continue;
+ break;
+ default:
+ if (!dentry)
+ continue;
+ dentry = dget_parent(dentry);
+ break;
+ }
+ inode = d_backing_inode(dentry);
+ if (inode) {
+ struct tomoyo_mini_stat *stat = &obj->stat[i];
+
+ stat->uid = inode->i_uid;
+ stat->gid = inode->i_gid;
+ stat->ino = inode->i_ino;
+ stat->mode = inode->i_mode;
+ stat->dev = inode->i_sb->s_dev;
+ stat->rdev = inode->i_rdev;
+ obj->stat_valid[i] = true;
+ }
+ if (i & 1) /* TOMOYO_PATH1_PARENT or TOMOYO_PATH2_PARENT */
+ dput(dentry);
+ }
+}
+
+/**
+ * tomoyo_condition - Check condition part.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+bool tomoyo_condition(struct tomoyo_request_info *r,
+ const struct tomoyo_condition *cond)
+{
+ u32 i;
+ unsigned long min_v[2] = { 0, 0 };
+ unsigned long max_v[2] = { 0, 0 };
+ const struct tomoyo_condition_element *condp;
+ const struct tomoyo_number_union *numbers_p;
+ const struct tomoyo_name_union *names_p;
+ const struct tomoyo_argv *argv;
+ const struct tomoyo_envp *envp;
+ struct tomoyo_obj_info *obj;
+ u16 condc;
+ u16 argc;
+ u16 envc;
+ struct linux_binprm *bprm = NULL;
+
+ if (!cond)
+ return true;
+ condc = cond->condc;
+ argc = cond->argc;
+ envc = cond->envc;
+ obj = r->obj;
+ if (r->ee)
+ bprm = r->ee->bprm;
+ if (!bprm && (argc || envc))
+ return false;
+ condp = (struct tomoyo_condition_element *) (cond + 1);
+ numbers_p = (const struct tomoyo_number_union *) (condp + condc);
+ names_p = (const struct tomoyo_name_union *)
+ (numbers_p + cond->numbers_count);
+ argv = (const struct tomoyo_argv *) (names_p + cond->names_count);
+ envp = (const struct tomoyo_envp *) (argv + argc);
+ for (i = 0; i < condc; i++) {
+ const bool match = condp->equals;
+ const u8 left = condp->left;
+ const u8 right = condp->right;
+ bool is_bitop[2] = { false, false };
+ u8 j;
+
+ condp++;
+ /* Check argv[] and envp[] later. */
+ if (left == TOMOYO_ARGV_ENTRY || left == TOMOYO_ENVP_ENTRY)
+ continue;
+ /* Check string expressions. */
+ if (right == TOMOYO_NAME_UNION) {
+ const struct tomoyo_name_union *ptr = names_p++;
+ struct tomoyo_path_info *symlink;
+ struct tomoyo_execve *ee;
+ struct file *file;
+
+ switch (left) {
+ case TOMOYO_SYMLINK_TARGET:
+ symlink = obj ? obj->symlink_target : NULL;
+ if (!symlink ||
+ !tomoyo_compare_name_union(symlink, ptr)
+ == match)
+ goto out;
+ break;
+ case TOMOYO_EXEC_REALPATH:
+ ee = r->ee;
+ file = ee ? ee->bprm->file : NULL;
+ if (!tomoyo_scan_exec_realpath(file, ptr,
+ match))
+ goto out;
+ break;
+ }
+ continue;
+ }
+ /* Check numeric or bit-op expressions. */
+ for (j = 0; j < 2; j++) {
+ const u8 index = j ? right : left;
+ unsigned long value = 0;
+
+ switch (index) {
+ case TOMOYO_TASK_UID:
+ value = from_kuid(&init_user_ns, current_uid());
+ break;
+ case TOMOYO_TASK_EUID:
+ value = from_kuid(&init_user_ns, current_euid());
+ break;
+ case TOMOYO_TASK_SUID:
+ value = from_kuid(&init_user_ns, current_suid());
+ break;
+ case TOMOYO_TASK_FSUID:
+ value = from_kuid(&init_user_ns, current_fsuid());
+ break;
+ case TOMOYO_TASK_GID:
+ value = from_kgid(&init_user_ns, current_gid());
+ break;
+ case TOMOYO_TASK_EGID:
+ value = from_kgid(&init_user_ns, current_egid());
+ break;
+ case TOMOYO_TASK_SGID:
+ value = from_kgid(&init_user_ns, current_sgid());
+ break;
+ case TOMOYO_TASK_FSGID:
+ value = from_kgid(&init_user_ns, current_fsgid());
+ break;
+ case TOMOYO_TASK_PID:
+ value = tomoyo_sys_getpid();
+ break;
+ case TOMOYO_TASK_PPID:
+ value = tomoyo_sys_getppid();
+ break;
+ case TOMOYO_TYPE_IS_SOCKET:
+ value = S_IFSOCK;
+ break;
+ case TOMOYO_TYPE_IS_SYMLINK:
+ value = S_IFLNK;
+ break;
+ case TOMOYO_TYPE_IS_FILE:
+ value = S_IFREG;
+ break;
+ case TOMOYO_TYPE_IS_BLOCK_DEV:
+ value = S_IFBLK;
+ break;
+ case TOMOYO_TYPE_IS_DIRECTORY:
+ value = S_IFDIR;
+ break;
+ case TOMOYO_TYPE_IS_CHAR_DEV:
+ value = S_IFCHR;
+ break;
+ case TOMOYO_TYPE_IS_FIFO:
+ value = S_IFIFO;
+ break;
+ case TOMOYO_MODE_SETUID:
+ value = S_ISUID;
+ break;
+ case TOMOYO_MODE_SETGID:
+ value = S_ISGID;
+ break;
+ case TOMOYO_MODE_STICKY:
+ value = S_ISVTX;
+ break;
+ case TOMOYO_MODE_OWNER_READ:
+ value = 0400;
+ break;
+ case TOMOYO_MODE_OWNER_WRITE:
+ value = 0200;
+ break;
+ case TOMOYO_MODE_OWNER_EXECUTE:
+ value = 0100;
+ break;
+ case TOMOYO_MODE_GROUP_READ:
+ value = 0040;
+ break;
+ case TOMOYO_MODE_GROUP_WRITE:
+ value = 0020;
+ break;
+ case TOMOYO_MODE_GROUP_EXECUTE:
+ value = 0010;
+ break;
+ case TOMOYO_MODE_OTHERS_READ:
+ value = 0004;
+ break;
+ case TOMOYO_MODE_OTHERS_WRITE:
+ value = 0002;
+ break;
+ case TOMOYO_MODE_OTHERS_EXECUTE:
+ value = 0001;
+ break;
+ case TOMOYO_EXEC_ARGC:
+ if (!bprm)
+ goto out;
+ value = bprm->argc;
+ break;
+ case TOMOYO_EXEC_ENVC:
+ if (!bprm)
+ goto out;
+ value = bprm->envc;
+ break;
+ case TOMOYO_NUMBER_UNION:
+ /* Fetch values later. */
+ break;
+ default:
+ if (!obj)
+ goto out;
+ if (!obj->validate_done) {
+ tomoyo_get_attributes(obj);
+ obj->validate_done = true;
+ }
+ {
+ u8 stat_index;
+ struct tomoyo_mini_stat *stat;
+
+ switch (index) {
+ case TOMOYO_PATH1_UID:
+ case TOMOYO_PATH1_GID:
+ case TOMOYO_PATH1_INO:
+ case TOMOYO_PATH1_MAJOR:
+ case TOMOYO_PATH1_MINOR:
+ case TOMOYO_PATH1_TYPE:
+ case TOMOYO_PATH1_DEV_MAJOR:
+ case TOMOYO_PATH1_DEV_MINOR:
+ case TOMOYO_PATH1_PERM:
+ stat_index = TOMOYO_PATH1;
+ break;
+ case TOMOYO_PATH2_UID:
+ case TOMOYO_PATH2_GID:
+ case TOMOYO_PATH2_INO:
+ case TOMOYO_PATH2_MAJOR:
+ case TOMOYO_PATH2_MINOR:
+ case TOMOYO_PATH2_TYPE:
+ case TOMOYO_PATH2_DEV_MAJOR:
+ case TOMOYO_PATH2_DEV_MINOR:
+ case TOMOYO_PATH2_PERM:
+ stat_index = TOMOYO_PATH2;
+ break;
+ case TOMOYO_PATH1_PARENT_UID:
+ case TOMOYO_PATH1_PARENT_GID:
+ case TOMOYO_PATH1_PARENT_INO:
+ case TOMOYO_PATH1_PARENT_PERM:
+ stat_index =
+ TOMOYO_PATH1_PARENT;
+ break;
+ case TOMOYO_PATH2_PARENT_UID:
+ case TOMOYO_PATH2_PARENT_GID:
+ case TOMOYO_PATH2_PARENT_INO:
+ case TOMOYO_PATH2_PARENT_PERM:
+ stat_index =
+ TOMOYO_PATH2_PARENT;
+ break;
+ default:
+ goto out;
+ }
+ if (!obj->stat_valid[stat_index])
+ goto out;
+ stat = &obj->stat[stat_index];
+ switch (index) {
+ case TOMOYO_PATH1_UID:
+ case TOMOYO_PATH2_UID:
+ case TOMOYO_PATH1_PARENT_UID:
+ case TOMOYO_PATH2_PARENT_UID:
+ value = from_kuid(&init_user_ns, stat->uid);
+ break;
+ case TOMOYO_PATH1_GID:
+ case TOMOYO_PATH2_GID:
+ case TOMOYO_PATH1_PARENT_GID:
+ case TOMOYO_PATH2_PARENT_GID:
+ value = from_kgid(&init_user_ns, stat->gid);
+ break;
+ case TOMOYO_PATH1_INO:
+ case TOMOYO_PATH2_INO:
+ case TOMOYO_PATH1_PARENT_INO:
+ case TOMOYO_PATH2_PARENT_INO:
+ value = stat->ino;
+ break;
+ case TOMOYO_PATH1_MAJOR:
+ case TOMOYO_PATH2_MAJOR:
+ value = MAJOR(stat->dev);
+ break;
+ case TOMOYO_PATH1_MINOR:
+ case TOMOYO_PATH2_MINOR:
+ value = MINOR(stat->dev);
+ break;
+ case TOMOYO_PATH1_TYPE:
+ case TOMOYO_PATH2_TYPE:
+ value = stat->mode & S_IFMT;
+ break;
+ case TOMOYO_PATH1_DEV_MAJOR:
+ case TOMOYO_PATH2_DEV_MAJOR:
+ value = MAJOR(stat->rdev);
+ break;
+ case TOMOYO_PATH1_DEV_MINOR:
+ case TOMOYO_PATH2_DEV_MINOR:
+ value = MINOR(stat->rdev);
+ break;
+ case TOMOYO_PATH1_PERM:
+ case TOMOYO_PATH2_PERM:
+ case TOMOYO_PATH1_PARENT_PERM:
+ case TOMOYO_PATH2_PARENT_PERM:
+ value = stat->mode & S_IALLUGO;
+ break;
+ }
+ }
+ break;
+ }
+ max_v[j] = value;
+ min_v[j] = value;
+ switch (index) {
+ case TOMOYO_MODE_SETUID:
+ case TOMOYO_MODE_SETGID:
+ case TOMOYO_MODE_STICKY:
+ case TOMOYO_MODE_OWNER_READ:
+ case TOMOYO_MODE_OWNER_WRITE:
+ case TOMOYO_MODE_OWNER_EXECUTE:
+ case TOMOYO_MODE_GROUP_READ:
+ case TOMOYO_MODE_GROUP_WRITE:
+ case TOMOYO_MODE_GROUP_EXECUTE:
+ case TOMOYO_MODE_OTHERS_READ:
+ case TOMOYO_MODE_OTHERS_WRITE:
+ case TOMOYO_MODE_OTHERS_EXECUTE:
+ is_bitop[j] = true;
+ }
+ }
+ if (left == TOMOYO_NUMBER_UNION) {
+ /* Fetch values now. */
+ const struct tomoyo_number_union *ptr = numbers_p++;
+
+ min_v[0] = ptr->values[0];
+ max_v[0] = ptr->values[1];
+ }
+ if (right == TOMOYO_NUMBER_UNION) {
+ /* Fetch values now. */
+ const struct tomoyo_number_union *ptr = numbers_p++;
+
+ if (ptr->group) {
+ if (tomoyo_number_matches_group(min_v[0],
+ max_v[0],
+ ptr->group)
+ == match)
+ continue;
+ } else {
+ if ((min_v[0] <= ptr->values[1] &&
+ max_v[0] >= ptr->values[0]) == match)
+ continue;
+ }
+ goto out;
+ }
+ /*
+ * Bit operation is valid only when counterpart value
+ * represents permission.
+ */
+ if (is_bitop[0] && is_bitop[1]) {
+ goto out;
+ } else if (is_bitop[0]) {
+ switch (right) {
+ case TOMOYO_PATH1_PERM:
+ case TOMOYO_PATH1_PARENT_PERM:
+ case TOMOYO_PATH2_PERM:
+ case TOMOYO_PATH2_PARENT_PERM:
+ if (!(max_v[0] & max_v[1]) == !match)
+ continue;
+ }
+ goto out;
+ } else if (is_bitop[1]) {
+ switch (left) {
+ case TOMOYO_PATH1_PERM:
+ case TOMOYO_PATH1_PARENT_PERM:
+ case TOMOYO_PATH2_PERM:
+ case TOMOYO_PATH2_PARENT_PERM:
+ if (!(max_v[0] & max_v[1]) == !match)
+ continue;
+ }
+ goto out;
+ }
+ /* Normal value range comparison. */
+ if ((min_v[0] <= max_v[1] && max_v[0] >= min_v[1]) == match)
+ continue;
+out:
+ return false;
+ }
+ /* Check argv[] and envp[] now. */
+ if (r->ee && (argc || envc))
+ return tomoyo_scan_bprm(r->ee, argc, argv, envc, envp);
+ return true;
+}
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c
new file mode 100644
index 000000000..dc4ecc0b2
--- /dev/null
+++ b/security/tomoyo/domain.c
@@ -0,0 +1,942 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/domain.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+
+#include <linux/binfmts.h>
+#include <linux/slab.h>
+#include <linux/rculist.h>
+
+/* Variables definitions.*/
+
+/* The initial domain. */
+struct tomoyo_domain_info tomoyo_kernel_domain;
+
+/**
+ * tomoyo_update_policy - Update an entry for exception policy.
+ *
+ * @new_entry: Pointer to "struct tomoyo_acl_info".
+ * @size: Size of @new_entry in bytes.
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @check_duplicate: Callback function to find duplicated entry.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
+ struct tomoyo_acl_param *param,
+ bool (*check_duplicate)(const struct tomoyo_acl_head
+ *,
+ const struct tomoyo_acl_head
+ *))
+{
+ int error = param->is_delete ? -ENOENT : -ENOMEM;
+ struct tomoyo_acl_head *entry;
+ struct list_head *list = param->list;
+
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ return -ENOMEM;
+ list_for_each_entry_rcu(entry, list, list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (entry->is_deleted == TOMOYO_GC_IN_PROGRESS)
+ continue;
+ if (!check_duplicate(entry, new_entry))
+ continue;
+ entry->is_deleted = param->is_delete;
+ error = 0;
+ break;
+ }
+ if (error && !param->is_delete) {
+ entry = tomoyo_commit_ok(new_entry, size);
+ if (entry) {
+ list_add_tail_rcu(&entry->list, list);
+ error = 0;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+ return error;
+}
+
+/**
+ * tomoyo_same_acl_head - Check for duplicated "struct tomoyo_acl_info" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static inline bool tomoyo_same_acl_head(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ return a->type == b->type && a->cond == b->cond;
+}
+
+/**
+ * tomoyo_update_domain - Update an entry for domain policy.
+ *
+ * @new_entry: Pointer to "struct tomoyo_acl_info".
+ * @size: Size of @new_entry in bytes.
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @check_duplicate: Callback function to find duplicated entry.
+ * @merge_duplicate: Callback function to merge duplicated entry.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
+ struct tomoyo_acl_param *param,
+ bool (*check_duplicate)(const struct tomoyo_acl_info
+ *,
+ const struct tomoyo_acl_info
+ *),
+ bool (*merge_duplicate)(struct tomoyo_acl_info *,
+ struct tomoyo_acl_info *,
+ const bool))
+{
+ const bool is_delete = param->is_delete;
+ int error = is_delete ? -ENOENT : -ENOMEM;
+ struct tomoyo_acl_info *entry;
+ struct list_head * const list = param->list;
+
+ if (param->data[0]) {
+ new_entry->cond = tomoyo_get_condition(param);
+ if (!new_entry->cond)
+ return -EINVAL;
+ /*
+ * Domain transition preference is allowed for only
+ * "file execute" entries.
+ */
+ if (new_entry->cond->transit &&
+ !(new_entry->type == TOMOYO_TYPE_PATH_ACL &&
+ container_of(new_entry, struct tomoyo_path_acl, head)
+ ->perm == 1 << TOMOYO_TYPE_EXECUTE))
+ goto out;
+ }
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ list_for_each_entry_rcu(entry, list, list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (entry->is_deleted == TOMOYO_GC_IN_PROGRESS)
+ continue;
+ if (!tomoyo_same_acl_head(entry, new_entry) ||
+ !check_duplicate(entry, new_entry))
+ continue;
+ if (merge_duplicate)
+ entry->is_deleted = merge_duplicate(entry, new_entry,
+ is_delete);
+ else
+ entry->is_deleted = is_delete;
+ error = 0;
+ break;
+ }
+ if (error && !is_delete) {
+ entry = tomoyo_commit_ok(new_entry, size);
+ if (entry) {
+ list_add_tail_rcu(&entry->list, list);
+ error = 0;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+out:
+ tomoyo_put_condition(new_entry->cond);
+ return error;
+}
+
+/**
+ * tomoyo_check_acl - Do permission check.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @check_entry: Callback function to check type specific parameters.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+void tomoyo_check_acl(struct tomoyo_request_info *r,
+ bool (*check_entry)(struct tomoyo_request_info *,
+ const struct tomoyo_acl_info *))
+{
+ const struct tomoyo_domain_info *domain = r->domain;
+ struct tomoyo_acl_info *ptr;
+ const struct list_head *list = &domain->acl_info_list;
+ u16 i = 0;
+
+retry:
+ list_for_each_entry_rcu(ptr, list, list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (ptr->is_deleted || ptr->type != r->param_type)
+ continue;
+ if (!check_entry(r, ptr))
+ continue;
+ if (!tomoyo_condition(r, ptr->cond))
+ continue;
+ r->matched_acl = ptr;
+ r->granted = true;
+ return;
+ }
+ for (; i < TOMOYO_MAX_ACL_GROUPS; i++) {
+ if (!test_bit(i, domain->group))
+ continue;
+ list = &domain->ns->acl_group[i++];
+ goto retry;
+ }
+ r->granted = false;
+}
+
+/* The list for "struct tomoyo_domain_info". */
+LIST_HEAD(tomoyo_domain_list);
+
+/**
+ * tomoyo_last_word - Get last component of a domainname.
+ *
+ * @name: Domainname to check.
+ *
+ * Returns the last word of @domainname.
+ */
+static const char *tomoyo_last_word(const char *name)
+{
+ const char *cp = strrchr(name, ' ');
+
+ if (cp)
+ return cp + 1;
+ return name;
+}
+
+/**
+ * tomoyo_same_transition_control - Check for duplicated "struct tomoyo_transition_control" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_head".
+ * @b: Pointer to "struct tomoyo_acl_head".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_transition_control(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ const struct tomoyo_transition_control *p1 = container_of(a,
+ typeof(*p1),
+ head);
+ const struct tomoyo_transition_control *p2 = container_of(b,
+ typeof(*p2),
+ head);
+
+ return p1->type == p2->type && p1->is_last_name == p2->is_last_name
+ && p1->domainname == p2->domainname
+ && p1->program == p2->program;
+}
+
+/**
+ * tomoyo_write_transition_control - Write "struct tomoyo_transition_control" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @type: Type of this entry.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
+ const u8 type)
+{
+ struct tomoyo_transition_control e = { .type = type };
+ int error = param->is_delete ? -ENOENT : -ENOMEM;
+ char *program = param->data;
+ char *domainname = strstr(program, " from ");
+
+ if (domainname) {
+ *domainname = '\0';
+ domainname += 6;
+ } else if (type == TOMOYO_TRANSITION_CONTROL_NO_KEEP ||
+ type == TOMOYO_TRANSITION_CONTROL_KEEP) {
+ domainname = program;
+ program = NULL;
+ }
+ if (program && strcmp(program, "any")) {
+ if (!tomoyo_correct_path(program))
+ return -EINVAL;
+ e.program = tomoyo_get_name(program);
+ if (!e.program)
+ goto out;
+ }
+ if (domainname && strcmp(domainname, "any")) {
+ if (!tomoyo_correct_domain(domainname)) {
+ if (!tomoyo_correct_path(domainname))
+ goto out;
+ e.is_last_name = true;
+ }
+ e.domainname = tomoyo_get_name(domainname);
+ if (!e.domainname)
+ goto out;
+ }
+ param->list = &param->ns->policy_list[TOMOYO_ID_TRANSITION_CONTROL];
+ error = tomoyo_update_policy(&e.head, sizeof(e), param,
+ tomoyo_same_transition_control);
+out:
+ tomoyo_put_name(e.domainname);
+ tomoyo_put_name(e.program);
+ return error;
+}
+
+/**
+ * tomoyo_scan_transition - Try to find specific domain transition type.
+ *
+ * @list: Pointer to "struct list_head".
+ * @domainname: The name of current domain.
+ * @program: The name of requested program.
+ * @last_name: The last component of @domainname.
+ * @type: One of values in "enum tomoyo_transition_type".
+ *
+ * Returns true if found one, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static inline bool tomoyo_scan_transition
+(const struct list_head *list, const struct tomoyo_path_info *domainname,
+ const struct tomoyo_path_info *program, const char *last_name,
+ const enum tomoyo_transition_type type)
+{
+ const struct tomoyo_transition_control *ptr;
+
+ list_for_each_entry_rcu(ptr, list, head.list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (ptr->head.is_deleted || ptr->type != type)
+ continue;
+ if (ptr->domainname) {
+ if (!ptr->is_last_name) {
+ if (ptr->domainname != domainname)
+ continue;
+ } else {
+ /*
+ * Use direct strcmp() since this is
+ * unlikely used.
+ */
+ if (strcmp(ptr->domainname->name, last_name))
+ continue;
+ }
+ }
+ if (ptr->program && tomoyo_pathcmp(ptr->program, program))
+ continue;
+ return true;
+ }
+ return false;
+}
+
+/**
+ * tomoyo_transition_type - Get domain transition type.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @domainname: The name of current domain.
+ * @program: The name of requested program.
+ *
+ * Returns TOMOYO_TRANSITION_CONTROL_TRANSIT if executing @program causes
+ * domain transition across namespaces, TOMOYO_TRANSITION_CONTROL_INITIALIZE if
+ * executing @program reinitializes domain transition within that namespace,
+ * TOMOYO_TRANSITION_CONTROL_KEEP if executing @program stays at @domainname ,
+ * others otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static enum tomoyo_transition_type tomoyo_transition_type
+(const struct tomoyo_policy_namespace *ns,
+ const struct tomoyo_path_info *domainname,
+ const struct tomoyo_path_info *program)
+{
+ const char *last_name = tomoyo_last_word(domainname->name);
+ enum tomoyo_transition_type type = TOMOYO_TRANSITION_CONTROL_NO_RESET;
+
+ while (type < TOMOYO_MAX_TRANSITION_TYPE) {
+ const struct list_head * const list =
+ &ns->policy_list[TOMOYO_ID_TRANSITION_CONTROL];
+
+ if (!tomoyo_scan_transition(list, domainname, program,
+ last_name, type)) {
+ type++;
+ continue;
+ }
+ if (type != TOMOYO_TRANSITION_CONTROL_NO_RESET &&
+ type != TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE)
+ break;
+ /*
+ * Do not check for reset_domain if no_reset_domain matched.
+ * Do not check for initialize_domain if no_initialize_domain
+ * matched.
+ */
+ type++;
+ type++;
+ }
+ return type;
+}
+
+/**
+ * tomoyo_same_aggregator - Check for duplicated "struct tomoyo_aggregator" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_head".
+ * @b: Pointer to "struct tomoyo_acl_head".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_aggregator(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ const struct tomoyo_aggregator *p1 = container_of(a, typeof(*p1),
+ head);
+ const struct tomoyo_aggregator *p2 = container_of(b, typeof(*p2),
+ head);
+
+ return p1->original_name == p2->original_name &&
+ p1->aggregated_name == p2->aggregated_name;
+}
+
+/**
+ * tomoyo_write_aggregator - Write "struct tomoyo_aggregator" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_write_aggregator(struct tomoyo_acl_param *param)
+{
+ struct tomoyo_aggregator e = { };
+ int error = param->is_delete ? -ENOENT : -ENOMEM;
+ const char *original_name = tomoyo_read_token(param);
+ const char *aggregated_name = tomoyo_read_token(param);
+
+ if (!tomoyo_correct_word(original_name) ||
+ !tomoyo_correct_path(aggregated_name))
+ return -EINVAL;
+ e.original_name = tomoyo_get_name(original_name);
+ e.aggregated_name = tomoyo_get_name(aggregated_name);
+ if (!e.original_name || !e.aggregated_name ||
+ e.aggregated_name->is_patterned) /* No patterns allowed. */
+ goto out;
+ param->list = &param->ns->policy_list[TOMOYO_ID_AGGREGATOR];
+ error = tomoyo_update_policy(&e.head, sizeof(e), param,
+ tomoyo_same_aggregator);
+out:
+ tomoyo_put_name(e.original_name);
+ tomoyo_put_name(e.aggregated_name);
+ return error;
+}
+
+/**
+ * tomoyo_find_namespace - Find specified namespace.
+ *
+ * @name: Name of namespace to find.
+ * @len: Length of @name.
+ *
+ * Returns pointer to "struct tomoyo_policy_namespace" if found,
+ * NULL otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static struct tomoyo_policy_namespace *tomoyo_find_namespace
+(const char *name, const unsigned int len)
+{
+ struct tomoyo_policy_namespace *ns;
+
+ list_for_each_entry(ns, &tomoyo_namespace_list, namespace_list) {
+ if (strncmp(name, ns->name, len) ||
+ (name[len] && name[len] != ' '))
+ continue;
+ return ns;
+ }
+ return NULL;
+}
+
+/**
+ * tomoyo_assign_namespace - Create a new namespace.
+ *
+ * @domainname: Name of namespace to create.
+ *
+ * Returns pointer to "struct tomoyo_policy_namespace" on success,
+ * NULL otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+struct tomoyo_policy_namespace *tomoyo_assign_namespace(const char *domainname)
+{
+ struct tomoyo_policy_namespace *ptr;
+ struct tomoyo_policy_namespace *entry;
+ const char *cp = domainname;
+ unsigned int len = 0;
+
+ while (*cp && *cp++ != ' ')
+ len++;
+ ptr = tomoyo_find_namespace(domainname, len);
+ if (ptr)
+ return ptr;
+ if (len >= TOMOYO_EXEC_TMPSIZE - 10 || !tomoyo_domain_def(domainname))
+ return NULL;
+ entry = kzalloc(sizeof(*entry) + len + 1, GFP_NOFS);
+ if (!entry)
+ return NULL;
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ ptr = tomoyo_find_namespace(domainname, len);
+ if (!ptr && tomoyo_memory_ok(entry)) {
+ char *name = (char *) (entry + 1);
+
+ ptr = entry;
+ memmove(name, domainname, len);
+ name[len] = '\0';
+ entry->name = name;
+ tomoyo_init_policy_namespace(entry);
+ entry = NULL;
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+out:
+ kfree(entry);
+ return ptr;
+}
+
+/**
+ * tomoyo_namespace_jump - Check for namespace jump.
+ *
+ * @domainname: Name of domain.
+ *
+ * Returns true if namespace differs, false otherwise.
+ */
+static bool tomoyo_namespace_jump(const char *domainname)
+{
+ const char *namespace = tomoyo_current_namespace()->name;
+ const int len = strlen(namespace);
+
+ return strncmp(domainname, namespace, len) ||
+ (domainname[len] && domainname[len] != ' ');
+}
+
+/**
+ * tomoyo_assign_domain - Create a domain or a namespace.
+ *
+ * @domainname: The name of domain.
+ * @transit: True if transit to domain found or created.
+ *
+ * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
+ const bool transit)
+{
+ struct tomoyo_domain_info e = { };
+ struct tomoyo_domain_info *entry = tomoyo_find_domain(domainname);
+ bool created = false;
+
+ if (entry) {
+ if (transit) {
+ /*
+ * Since namespace is created at runtime, profiles may
+ * not be created by the moment the process transits to
+ * that domain. Do not perform domain transition if
+ * profile for that domain is not yet created.
+ */
+ if (tomoyo_policy_loaded &&
+ !entry->ns->profile_ptr[entry->profile])
+ return NULL;
+ }
+ return entry;
+ }
+ /* Requested domain does not exist. */
+ /* Don't create requested domain if domainname is invalid. */
+ if (strlen(domainname) >= TOMOYO_EXEC_TMPSIZE - 10 ||
+ !tomoyo_correct_domain(domainname))
+ return NULL;
+ /*
+ * Since definition of profiles and acl_groups may differ across
+ * namespaces, do not inherit "use_profile" and "use_group" settings
+ * by automatically creating requested domain upon domain transition.
+ */
+ if (transit && tomoyo_namespace_jump(domainname))
+ return NULL;
+ e.ns = tomoyo_assign_namespace(domainname);
+ if (!e.ns)
+ return NULL;
+ /*
+ * "use_profile" and "use_group" settings for automatically created
+ * domains are inherited from current domain. These are 0 for manually
+ * created domains.
+ */
+ if (transit) {
+ const struct tomoyo_domain_info *domain = tomoyo_domain();
+
+ e.profile = domain->profile;
+ memcpy(e.group, domain->group, sizeof(e.group));
+ }
+ e.domainname = tomoyo_get_name(domainname);
+ if (!e.domainname)
+ return NULL;
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ entry = tomoyo_find_domain(domainname);
+ if (!entry) {
+ entry = tomoyo_commit_ok(&e, sizeof(e));
+ if (entry) {
+ INIT_LIST_HEAD(&entry->acl_info_list);
+ list_add_tail_rcu(&entry->list, &tomoyo_domain_list);
+ created = true;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+out:
+ tomoyo_put_name(e.domainname);
+ if (entry && transit) {
+ if (created) {
+ struct tomoyo_request_info r;
+ int i;
+
+ tomoyo_init_request_info(&r, entry,
+ TOMOYO_MAC_FILE_EXECUTE);
+ r.granted = false;
+ tomoyo_write_log(&r, "use_profile %u\n",
+ entry->profile);
+ for (i = 0; i < TOMOYO_MAX_ACL_GROUPS; i++)
+ if (test_bit(i, entry->group))
+ tomoyo_write_log(&r, "use_group %u\n",
+ i);
+ tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
+ }
+ }
+ return entry;
+}
+
+/**
+ * tomoyo_environ - Check permission for environment variable names.
+ *
+ * @ee: Pointer to "struct tomoyo_execve".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_environ(struct tomoyo_execve *ee)
+{
+ struct tomoyo_request_info *r = &ee->r;
+ struct linux_binprm *bprm = ee->bprm;
+ /* env_page.data is allocated by tomoyo_dump_page(). */
+ struct tomoyo_page_dump env_page = { };
+ char *arg_ptr; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
+ int arg_len = 0;
+ unsigned long pos = bprm->p;
+ int offset = pos % PAGE_SIZE;
+ int argv_count = bprm->argc;
+ int envp_count = bprm->envc;
+ int error = -ENOMEM;
+
+ ee->r.type = TOMOYO_MAC_ENVIRON;
+ ee->r.profile = r->domain->profile;
+ ee->r.mode = tomoyo_get_mode(r->domain->ns, ee->r.profile,
+ TOMOYO_MAC_ENVIRON);
+ if (!r->mode || !envp_count)
+ return 0;
+ arg_ptr = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS);
+ if (!arg_ptr)
+ goto out;
+ while (error == -ENOMEM) {
+ if (!tomoyo_dump_page(bprm, pos, &env_page))
+ goto out;
+ pos += PAGE_SIZE - offset;
+ /* Read. */
+ while (argv_count && offset < PAGE_SIZE) {
+ if (!env_page.data[offset++])
+ argv_count--;
+ }
+ if (argv_count) {
+ offset = 0;
+ continue;
+ }
+ while (offset < PAGE_SIZE) {
+ const unsigned char c = env_page.data[offset++];
+
+ if (c && arg_len < TOMOYO_EXEC_TMPSIZE - 10) {
+ if (c == '=') {
+ arg_ptr[arg_len++] = '\0';
+ } else if (c == '\\') {
+ arg_ptr[arg_len++] = '\\';
+ arg_ptr[arg_len++] = '\\';
+ } else if (c > ' ' && c < 127) {
+ arg_ptr[arg_len++] = c;
+ } else {
+ arg_ptr[arg_len++] = '\\';
+ arg_ptr[arg_len++] = (c >> 6) + '0';
+ arg_ptr[arg_len++]
+ = ((c >> 3) & 7) + '0';
+ arg_ptr[arg_len++] = (c & 7) + '0';
+ }
+ } else {
+ arg_ptr[arg_len] = '\0';
+ }
+ if (c)
+ continue;
+ if (tomoyo_env_perm(r, arg_ptr)) {
+ error = -EPERM;
+ break;
+ }
+ if (!--envp_count) {
+ error = 0;
+ break;
+ }
+ arg_len = 0;
+ }
+ offset = 0;
+ }
+out:
+ if (r->mode != TOMOYO_CONFIG_ENFORCING)
+ error = 0;
+ kfree(env_page.data);
+ kfree(arg_ptr);
+ return error;
+}
+
+/**
+ * tomoyo_find_next_domain - Find a domain.
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_find_next_domain(struct linux_binprm *bprm)
+{
+ struct tomoyo_domain_info *old_domain = tomoyo_domain();
+ struct tomoyo_domain_info *domain = NULL;
+ const char *original_name = bprm->filename;
+ int retval = -ENOMEM;
+ bool reject_on_transition_failure = false;
+ const struct tomoyo_path_info *candidate;
+ struct tomoyo_path_info exename;
+ struct tomoyo_execve *ee = kzalloc(sizeof(*ee), GFP_NOFS);
+
+ if (!ee)
+ return -ENOMEM;
+ ee->tmp = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS);
+ if (!ee->tmp) {
+ kfree(ee);
+ return -ENOMEM;
+ }
+ /* ee->dump->data is allocated by tomoyo_dump_page(). */
+ tomoyo_init_request_info(&ee->r, NULL, TOMOYO_MAC_FILE_EXECUTE);
+ ee->r.ee = ee;
+ ee->bprm = bprm;
+ ee->r.obj = &ee->obj;
+ ee->obj.path1 = bprm->file->f_path;
+ /* Get symlink's pathname of program. */
+ retval = -ENOENT;
+ exename.name = tomoyo_realpath_nofollow(original_name);
+ if (!exename.name)
+ goto out;
+ tomoyo_fill_path_info(&exename);
+retry:
+ /* Check 'aggregator' directive. */
+ {
+ struct tomoyo_aggregator *ptr;
+ struct list_head *list =
+ &old_domain->ns->policy_list[TOMOYO_ID_AGGREGATOR];
+
+ /* Check 'aggregator' directive. */
+ candidate = &exename;
+ list_for_each_entry_rcu(ptr, list, head.list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (ptr->head.is_deleted ||
+ !tomoyo_path_matches_pattern(&exename,
+ ptr->original_name))
+ continue;
+ candidate = ptr->aggregated_name;
+ break;
+ }
+ }
+
+ /* Check execute permission. */
+ retval = tomoyo_execute_permission(&ee->r, candidate);
+ if (retval == TOMOYO_RETRY_REQUEST)
+ goto retry;
+ if (retval < 0)
+ goto out;
+ /*
+ * To be able to specify domainnames with wildcards, use the
+ * pathname specified in the policy (which may contain
+ * wildcard) rather than the pathname passed to execve()
+ * (which never contains wildcard).
+ */
+ if (ee->r.param.path.matched_path)
+ candidate = ee->r.param.path.matched_path;
+
+ /*
+ * Check for domain transition preference if "file execute" matched.
+ * If preference is given, make execve() fail if domain transition
+ * has failed, for domain transition preference should be used with
+ * destination domain defined.
+ */
+ if (ee->transition) {
+ const char *domainname = ee->transition->name;
+
+ reject_on_transition_failure = true;
+ if (!strcmp(domainname, "keep"))
+ goto force_keep_domain;
+ if (!strcmp(domainname, "child"))
+ goto force_child_domain;
+ if (!strcmp(domainname, "reset"))
+ goto force_reset_domain;
+ if (!strcmp(domainname, "initialize"))
+ goto force_initialize_domain;
+ if (!strcmp(domainname, "parent")) {
+ char *cp;
+
+ strncpy(ee->tmp, old_domain->domainname->name,
+ TOMOYO_EXEC_TMPSIZE - 1);
+ cp = strrchr(ee->tmp, ' ');
+ if (cp)
+ *cp = '\0';
+ } else if (*domainname == '<')
+ strncpy(ee->tmp, domainname, TOMOYO_EXEC_TMPSIZE - 1);
+ else
+ snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
+ old_domain->domainname->name, domainname);
+ goto force_jump_domain;
+ }
+ /*
+ * No domain transition preference specified.
+ * Calculate domain to transit to.
+ */
+ switch (tomoyo_transition_type(old_domain->ns, old_domain->domainname,
+ candidate)) {
+ case TOMOYO_TRANSITION_CONTROL_RESET:
+force_reset_domain:
+ /* Transit to the root of specified namespace. */
+ snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "<%s>",
+ candidate->name);
+ /*
+ * Make execve() fail if domain transition across namespaces
+ * has failed.
+ */
+ reject_on_transition_failure = true;
+ break;
+ case TOMOYO_TRANSITION_CONTROL_INITIALIZE:
+force_initialize_domain:
+ /* Transit to the child of current namespace's root. */
+ snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
+ old_domain->ns->name, candidate->name);
+ break;
+ case TOMOYO_TRANSITION_CONTROL_KEEP:
+force_keep_domain:
+ /* Keep current domain. */
+ domain = old_domain;
+ break;
+ default:
+ if (old_domain == &tomoyo_kernel_domain &&
+ !tomoyo_policy_loaded) {
+ /*
+ * Needn't to transit from kernel domain before
+ * starting /sbin/init. But transit from kernel domain
+ * if executing initializers because they might start
+ * before /sbin/init.
+ */
+ domain = old_domain;
+ break;
+ }
+force_child_domain:
+ /* Normal domain transition. */
+ snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
+ old_domain->domainname->name, candidate->name);
+ break;
+ }
+force_jump_domain:
+ if (!domain)
+ domain = tomoyo_assign_domain(ee->tmp, true);
+ if (domain)
+ retval = 0;
+ else if (reject_on_transition_failure) {
+ pr_warn("ERROR: Domain '%s' not ready.\n", ee->tmp);
+ retval = -ENOMEM;
+ } else if (ee->r.mode == TOMOYO_CONFIG_ENFORCING)
+ retval = -ENOMEM;
+ else {
+ retval = 0;
+ if (!old_domain->flags[TOMOYO_DIF_TRANSITION_FAILED]) {
+ old_domain->flags[TOMOYO_DIF_TRANSITION_FAILED] = true;
+ ee->r.granted = false;
+ tomoyo_write_log(&ee->r, "%s", tomoyo_dif
+ [TOMOYO_DIF_TRANSITION_FAILED]);
+ pr_warn("ERROR: Domain '%s' not defined.\n", ee->tmp);
+ }
+ }
+ out:
+ if (!domain)
+ domain = old_domain;
+ /* Update reference count on "struct tomoyo_domain_info". */
+ {
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ s->old_domain_info = s->domain_info;
+ s->domain_info = domain;
+ atomic_inc(&domain->users);
+ }
+ kfree(exename.name);
+ if (!retval) {
+ ee->r.domain = domain;
+ retval = tomoyo_environ(ee);
+ }
+ kfree(ee->tmp);
+ kfree(ee->dump.data);
+ kfree(ee);
+ return retval;
+}
+
+/**
+ * tomoyo_dump_page - Dump a page to buffer.
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ * @pos: Location to dump.
+ * @dump: Poiner to "struct tomoyo_page_dump".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
+ struct tomoyo_page_dump *dump)
+{
+ struct page *page;
+
+ /* dump->data is released by tomoyo_find_next_domain(). */
+ if (!dump->data) {
+ dump->data = kzalloc(PAGE_SIZE, GFP_NOFS);
+ if (!dump->data)
+ return false;
+ }
+ /* Same with get_arg_page(bprm, pos, 0) in fs/exec.c */
+#ifdef CONFIG_MMU
+ /*
+ * This is called at execve() time in order to dig around
+ * in the argv/environment of the new proceess
+ * (represented by bprm). 'current' is the process doing
+ * the execve().
+ */
+ if (get_user_pages_remote(bprm->mm, pos, 1,
+ FOLL_FORCE, &page, NULL, NULL) <= 0)
+ return false;
+#else
+ page = bprm->page[pos / PAGE_SIZE];
+#endif
+ if (page != dump->page) {
+ const unsigned int offset = pos % PAGE_SIZE;
+ /*
+ * Maybe kmap()/kunmap() should be used here.
+ * But remove_arg_zero() uses kmap_atomic()/kunmap_atomic().
+ * So do I.
+ */
+ char *kaddr = kmap_atomic(page);
+
+ dump->page = page;
+ memcpy(dump->data + offset, kaddr + offset,
+ PAGE_SIZE - offset);
+ kunmap_atomic(kaddr);
+ }
+ /* Same with put_arg_page(page) in fs/exec.c */
+#ifdef CONFIG_MMU
+ put_page(page);
+#endif
+ return true;
+}
diff --git a/security/tomoyo/environ.c b/security/tomoyo/environ.c
new file mode 100644
index 000000000..7f0a471f1
--- /dev/null
+++ b/security/tomoyo/environ.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/environ.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+
+/**
+ * tomoyo_check_env_acl - Check permission for environment variable's name.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_env_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_env_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+
+ return tomoyo_path_matches_pattern(r->param.environ.name, acl->env);
+}
+
+/**
+ * tomoyo_audit_env_log - Audit environment variable name log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_env_log(struct tomoyo_request_info *r)
+{
+ return tomoyo_supervisor(r, "misc env %s\n",
+ r->param.environ.name->name);
+}
+
+/**
+ * tomoyo_env_perm - Check permission for environment variable's name.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @env: The name of environment variable.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env)
+{
+ struct tomoyo_path_info environ;
+ int error;
+
+ if (!env || !*env)
+ return 0;
+ environ.name = env;
+ tomoyo_fill_path_info(&environ);
+ r->param_type = TOMOYO_TYPE_ENV_ACL;
+ r->param.environ.name = &environ;
+ do {
+ tomoyo_check_acl(r, tomoyo_check_env_acl);
+ error = tomoyo_audit_env_log(r);
+ } while (error == TOMOYO_RETRY_REQUEST);
+ return error;
+}
+
+/**
+ * tomoyo_same_env_acl - Check for duplicated "struct tomoyo_env_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_env_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_env_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_env_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return p1->env == p2->env;
+}
+
+/**
+ * tomoyo_write_env - Write "struct tomoyo_env_acl" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_write_env(struct tomoyo_acl_param *param)
+{
+ struct tomoyo_env_acl e = { .head.type = TOMOYO_TYPE_ENV_ACL };
+ int error = -ENOMEM;
+ const char *data = tomoyo_read_token(param);
+
+ if (!tomoyo_correct_word(data) || strchr(data, '='))
+ return -EINVAL;
+ e.env = tomoyo_get_name(data);
+ if (!e.env)
+ return error;
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_env_acl, NULL);
+ tomoyo_put_name(e.env);
+ return error;
+}
+
+/**
+ * tomoyo_write_misc - Update environment variable list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_misc(struct tomoyo_acl_param *param)
+{
+ if (tomoyo_str_starts(&param->data, "env "))
+ return tomoyo_write_env(param);
+ return -EINVAL;
+}
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
new file mode 100644
index 000000000..1e6077568
--- /dev/null
+++ b/security/tomoyo/file.c
@@ -0,0 +1,1045 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/file.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+#include <linux/slab.h>
+
+/*
+ * Mapping table from "enum tomoyo_path_acl_index" to "enum tomoyo_mac_index".
+ */
+static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = {
+ [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE,
+ [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN,
+ [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN,
+ [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN,
+ [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK,
+ [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR,
+ [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR,
+ [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE,
+ [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK,
+ [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT,
+ [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT,
+};
+
+/*
+ * Mapping table from "enum tomoyo_mkdev_acl_index" to "enum tomoyo_mac_index".
+ */
+const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = {
+ [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK,
+ [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR,
+};
+
+/*
+ * Mapping table from "enum tomoyo_path2_acl_index" to "enum tomoyo_mac_index".
+ */
+const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = {
+ [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK,
+ [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME,
+ [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT,
+};
+
+/*
+ * Mapping table from "enum tomoyo_path_number_acl_index" to
+ * "enum tomoyo_mac_index".
+ */
+const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = {
+ [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE,
+ [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR,
+ [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO,
+ [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK,
+ [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL,
+ [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD,
+ [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN,
+ [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP,
+};
+
+/**
+ * tomoyo_put_name_union - Drop reference on "struct tomoyo_name_union".
+ *
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ *
+ * Returns nothing.
+ */
+void tomoyo_put_name_union(struct tomoyo_name_union *ptr)
+{
+ tomoyo_put_group(ptr->group);
+ tomoyo_put_name(ptr->filename);
+}
+
+/**
+ * tomoyo_compare_name_union - Check whether a name matches "struct tomoyo_name_union" or not.
+ *
+ * @name: Pointer to "struct tomoyo_path_info".
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ *
+ * Returns "struct tomoyo_path_info" if @name matches @ptr, NULL otherwise.
+ */
+const struct tomoyo_path_info *
+tomoyo_compare_name_union(const struct tomoyo_path_info *name,
+ const struct tomoyo_name_union *ptr)
+{
+ if (ptr->group)
+ return tomoyo_path_matches_group(name, ptr->group);
+ if (tomoyo_path_matches_pattern(name, ptr->filename))
+ return ptr->filename;
+ return NULL;
+}
+
+/**
+ * tomoyo_put_number_union - Drop reference on "struct tomoyo_number_union".
+ *
+ * @ptr: Pointer to "struct tomoyo_number_union".
+ *
+ * Returns nothing.
+ */
+void tomoyo_put_number_union(struct tomoyo_number_union *ptr)
+{
+ tomoyo_put_group(ptr->group);
+}
+
+/**
+ * tomoyo_compare_number_union - Check whether a value matches "struct tomoyo_number_union" or not.
+ *
+ * @value: Number to check.
+ * @ptr: Pointer to "struct tomoyo_number_union".
+ *
+ * Returns true if @value matches @ptr, false otherwise.
+ */
+bool tomoyo_compare_number_union(const unsigned long value,
+ const struct tomoyo_number_union *ptr)
+{
+ if (ptr->group)
+ return tomoyo_number_matches_group(value, value, ptr->group);
+ return value >= ptr->values[0] && value <= ptr->values[1];
+}
+
+/**
+ * tomoyo_add_slash - Add trailing '/' if needed.
+ *
+ * @buf: Pointer to "struct tomoyo_path_info".
+ *
+ * Returns nothing.
+ *
+ * @buf must be generated by tomoyo_encode() because this function does not
+ * allocate memory for adding '/'.
+ */
+static void tomoyo_add_slash(struct tomoyo_path_info *buf)
+{
+ if (buf->is_dir)
+ return;
+ /*
+ * This is OK because tomoyo_encode() reserves space for appending "/".
+ */
+ strcat((char *) buf->name, "/");
+ tomoyo_fill_path_info(buf);
+}
+
+/**
+ * tomoyo_get_realpath - Get realpath.
+ *
+ * @buf: Pointer to "struct tomoyo_path_info".
+ * @path: Pointer to "struct path".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, const struct path *path)
+{
+ buf->name = tomoyo_realpath_from_path(path);
+ if (buf->name) {
+ tomoyo_fill_path_info(buf);
+ return true;
+ }
+ return false;
+}
+
+/**
+ * tomoyo_audit_path_log - Audit path request log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
+{
+ return tomoyo_supervisor(r, "file %s %s\n", tomoyo_path_keyword
+ [r->param.path.operation],
+ r->param.path.filename->name);
+}
+
+/**
+ * tomoyo_audit_path2_log - Audit path/path request log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
+{
+ return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords
+ [tomoyo_pp2mac[r->param.path2.operation]],
+ r->param.path2.filename1->name,
+ r->param.path2.filename2->name);
+}
+
+/**
+ * tomoyo_audit_mkdev_log - Audit path/number/number/number request log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r)
+{
+ return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n",
+ tomoyo_mac_keywords
+ [tomoyo_pnnn2mac[r->param.mkdev.operation]],
+ r->param.mkdev.filename->name,
+ r->param.mkdev.mode, r->param.mkdev.major,
+ r->param.mkdev.minor);
+}
+
+/**
+ * tomoyo_audit_path_number_log - Audit path/number request log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
+{
+ const u8 type = r->param.path_number.operation;
+ u8 radix;
+ char buffer[64];
+
+ switch (type) {
+ case TOMOYO_TYPE_CREATE:
+ case TOMOYO_TYPE_MKDIR:
+ case TOMOYO_TYPE_MKFIFO:
+ case TOMOYO_TYPE_MKSOCK:
+ case TOMOYO_TYPE_CHMOD:
+ radix = TOMOYO_VALUE_TYPE_OCTAL;
+ break;
+ case TOMOYO_TYPE_IOCTL:
+ radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
+ break;
+ default:
+ radix = TOMOYO_VALUE_TYPE_DECIMAL;
+ break;
+ }
+ tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number,
+ radix);
+ return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords
+ [tomoyo_pn2mac[type]],
+ r->param.path_number.filename->name, buffer);
+}
+
+/**
+ * tomoyo_check_path_acl - Check permission for path operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ *
+ * To be able to use wildcard for domain transition, this function sets
+ * matching entry on success. Since the caller holds tomoyo_read_lock(),
+ * it is safe to set matching entry.
+ */
+static bool tomoyo_check_path_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl),
+ head);
+
+ if (acl->perm & (1 << r->param.path.operation)) {
+ r->param.path.matched_path =
+ tomoyo_compare_name_union(r->param.path.filename,
+ &acl->name);
+ return r->param.path.matched_path != NULL;
+ }
+ return false;
+}
+
+/**
+ * tomoyo_check_path_number_acl - Check permission for path number operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_path_number_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+
+ return (acl->perm & (1 << r->param.path_number.operation)) &&
+ tomoyo_compare_number_union(r->param.path_number.number,
+ &acl->number) &&
+ tomoyo_compare_name_union(r->param.path_number.filename,
+ &acl->name);
+}
+
+/**
+ * tomoyo_check_path2_acl - Check permission for path path operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_path2_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+
+ return (acl->perm & (1 << r->param.path2.operation)) &&
+ tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1)
+ && tomoyo_compare_name_union(r->param.path2.filename2,
+ &acl->name2);
+}
+
+/**
+ * tomoyo_check_mkdev_acl - Check permission for path number number number operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_mkdev_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+
+ return (acl->perm & (1 << r->param.mkdev.operation)) &&
+ tomoyo_compare_number_union(r->param.mkdev.mode,
+ &acl->mode) &&
+ tomoyo_compare_number_union(r->param.mkdev.major,
+ &acl->major) &&
+ tomoyo_compare_number_union(r->param.mkdev.minor,
+ &acl->minor) &&
+ tomoyo_compare_name_union(r->param.mkdev.filename,
+ &acl->name);
+}
+
+/**
+ * tomoyo_same_path_acl - Check for duplicated "struct tomoyo_path_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b except permission bits, false otherwise.
+ */
+static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return tomoyo_same_name_union(&p1->name, &p2->name);
+}
+
+/**
+ * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ * @is_delete: True for @a &= ~@b, false for @a |= @b.
+ *
+ * Returns true if @a is empty, false otherwise.
+ */
+static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a,
+ struct tomoyo_acl_info *b,
+ const bool is_delete)
+{
+ u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head)
+ ->perm;
+ u16 perm = READ_ONCE(*a_perm);
+ const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm;
+
+ if (is_delete)
+ perm &= ~b_perm;
+ else
+ perm |= b_perm;
+ WRITE_ONCE(*a_perm, perm);
+ return !perm;
+}
+
+/**
+ * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list.
+ *
+ * @perm: Permission.
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_update_path_acl(const u16 perm,
+ struct tomoyo_acl_param *param)
+{
+ struct tomoyo_path_acl e = {
+ .head.type = TOMOYO_TYPE_PATH_ACL,
+ .perm = perm
+ };
+ int error;
+
+ if (!tomoyo_parse_name_union(param, &e.name))
+ error = -EINVAL;
+ else
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_path_acl,
+ tomoyo_merge_path_acl);
+ tomoyo_put_name_union(&e.name);
+ return error;
+}
+
+/**
+ * tomoyo_same_mkdev_acl - Check for duplicated "struct tomoyo_mkdev_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b except permission bits, false otherwise.
+ */
+static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return tomoyo_same_name_union(&p1->name, &p2->name) &&
+ tomoyo_same_number_union(&p1->mode, &p2->mode) &&
+ tomoyo_same_number_union(&p1->major, &p2->major) &&
+ tomoyo_same_number_union(&p1->minor, &p2->minor);
+}
+
+/**
+ * tomoyo_merge_mkdev_acl - Merge duplicated "struct tomoyo_mkdev_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ * @is_delete: True for @a &= ~@b, false for @a |= @b.
+ *
+ * Returns true if @a is empty, false otherwise.
+ */
+static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a,
+ struct tomoyo_acl_info *b,
+ const bool is_delete)
+{
+ u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl,
+ head)->perm;
+ u8 perm = READ_ONCE(*a_perm);
+ const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head)
+ ->perm;
+
+ if (is_delete)
+ perm &= ~b_perm;
+ else
+ perm |= b_perm;
+ WRITE_ONCE(*a_perm, perm);
+ return !perm;
+}
+
+/**
+ * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list.
+ *
+ * @perm: Permission.
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_update_mkdev_acl(const u8 perm,
+ struct tomoyo_acl_param *param)
+{
+ struct tomoyo_mkdev_acl e = {
+ .head.type = TOMOYO_TYPE_MKDEV_ACL,
+ .perm = perm
+ };
+ int error;
+
+ if (!tomoyo_parse_name_union(param, &e.name) ||
+ !tomoyo_parse_number_union(param, &e.mode) ||
+ !tomoyo_parse_number_union(param, &e.major) ||
+ !tomoyo_parse_number_union(param, &e.minor))
+ error = -EINVAL;
+ else
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_mkdev_acl,
+ tomoyo_merge_mkdev_acl);
+ tomoyo_put_name_union(&e.name);
+ tomoyo_put_number_union(&e.mode);
+ tomoyo_put_number_union(&e.major);
+ tomoyo_put_number_union(&e.minor);
+ return error;
+}
+
+/**
+ * tomoyo_same_path2_acl - Check for duplicated "struct tomoyo_path2_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b except permission bits, false otherwise.
+ */
+static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return tomoyo_same_name_union(&p1->name1, &p2->name1) &&
+ tomoyo_same_name_union(&p1->name2, &p2->name2);
+}
+
+/**
+ * tomoyo_merge_path2_acl - Merge duplicated "struct tomoyo_path2_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ * @is_delete: True for @a &= ~@b, false for @a |= @b.
+ *
+ * Returns true if @a is empty, false otherwise.
+ */
+static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a,
+ struct tomoyo_acl_info *b,
+ const bool is_delete)
+{
+ u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head)
+ ->perm;
+ u8 perm = READ_ONCE(*a_perm);
+ const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm;
+
+ if (is_delete)
+ perm &= ~b_perm;
+ else
+ perm |= b_perm;
+ WRITE_ONCE(*a_perm, perm);
+ return !perm;
+}
+
+/**
+ * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list.
+ *
+ * @perm: Permission.
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_update_path2_acl(const u8 perm,
+ struct tomoyo_acl_param *param)
+{
+ struct tomoyo_path2_acl e = {
+ .head.type = TOMOYO_TYPE_PATH2_ACL,
+ .perm = perm
+ };
+ int error;
+
+ if (!tomoyo_parse_name_union(param, &e.name1) ||
+ !tomoyo_parse_name_union(param, &e.name2))
+ error = -EINVAL;
+ else
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_path2_acl,
+ tomoyo_merge_path2_acl);
+ tomoyo_put_name_union(&e.name1);
+ tomoyo_put_name_union(&e.name2);
+ return error;
+}
+
+/**
+ * tomoyo_path_permission - Check permission for single path operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @operation: Type of operation.
+ * @filename: Filename to check.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
+ const struct tomoyo_path_info *filename)
+{
+ int error;
+
+ r->type = tomoyo_p2mac[operation];
+ r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type);
+ if (r->mode == TOMOYO_CONFIG_DISABLED)
+ return 0;
+ r->param_type = TOMOYO_TYPE_PATH_ACL;
+ r->param.path.filename = filename;
+ r->param.path.operation = operation;
+ do {
+ tomoyo_check_acl(r, tomoyo_check_path_acl);
+ error = tomoyo_audit_path_log(r);
+ } while (error == TOMOYO_RETRY_REQUEST);
+ return error;
+}
+
+/**
+ * tomoyo_execute_permission - Check permission for execute operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @filename: Filename to check.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_execute_permission(struct tomoyo_request_info *r,
+ const struct tomoyo_path_info *filename)
+{
+ /*
+ * Unlike other permission checks, this check is done regardless of
+ * profile mode settings in order to check for domain transition
+ * preference.
+ */
+ r->type = TOMOYO_MAC_FILE_EXECUTE;
+ r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type);
+ r->param_type = TOMOYO_TYPE_PATH_ACL;
+ r->param.path.filename = filename;
+ r->param.path.operation = TOMOYO_TYPE_EXECUTE;
+ tomoyo_check_acl(r, tomoyo_check_path_acl);
+ r->ee->transition = r->matched_acl && r->matched_acl->cond ?
+ r->matched_acl->cond->transit : NULL;
+ if (r->mode != TOMOYO_CONFIG_DISABLED)
+ return tomoyo_audit_path_log(r);
+ return 0;
+}
+
+/**
+ * tomoyo_same_path_number_acl - Check for duplicated "struct tomoyo_path_number_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b except permission bits, false otherwise.
+ */
+static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1),
+ head);
+ const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2),
+ head);
+
+ return tomoyo_same_name_union(&p1->name, &p2->name) &&
+ tomoyo_same_number_union(&p1->number, &p2->number);
+}
+
+/**
+ * tomoyo_merge_path_number_acl - Merge duplicated "struct tomoyo_path_number_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ * @is_delete: True for @a &= ~@b, false for @a |= @b.
+ *
+ * Returns true if @a is empty, false otherwise.
+ */
+static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a,
+ struct tomoyo_acl_info *b,
+ const bool is_delete)
+{
+ u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl,
+ head)->perm;
+ u8 perm = READ_ONCE(*a_perm);
+ const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head)
+ ->perm;
+
+ if (is_delete)
+ perm &= ~b_perm;
+ else
+ perm |= b_perm;
+ WRITE_ONCE(*a_perm, perm);
+ return !perm;
+}
+
+/**
+ * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL.
+ *
+ * @perm: Permission.
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_path_number_acl(const u8 perm,
+ struct tomoyo_acl_param *param)
+{
+ struct tomoyo_path_number_acl e = {
+ .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL,
+ .perm = perm
+ };
+ int error;
+
+ if (!tomoyo_parse_name_union(param, &e.name) ||
+ !tomoyo_parse_number_union(param, &e.number))
+ error = -EINVAL;
+ else
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_path_number_acl,
+ tomoyo_merge_path_number_acl);
+ tomoyo_put_name_union(&e.name);
+ tomoyo_put_number_union(&e.number);
+ return error;
+}
+
+/**
+ * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
+ *
+ * @type: Type of operation.
+ * @path: Pointer to "struct path".
+ * @number: Number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_path_number_perm(const u8 type, const struct path *path,
+ unsigned long number)
+{
+ struct tomoyo_request_info r;
+ struct tomoyo_obj_info obj = {
+ .path1 = { .mnt = path->mnt, .dentry = path->dentry },
+ };
+ int error = -ENOMEM;
+ struct tomoyo_path_info buf;
+ int idx;
+
+ if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type])
+ == TOMOYO_CONFIG_DISABLED || !path->dentry)
+ return 0;
+ idx = tomoyo_read_lock();
+ if (!tomoyo_get_realpath(&buf, path))
+ goto out;
+ r.obj = &obj;
+ if (type == TOMOYO_TYPE_MKDIR)
+ tomoyo_add_slash(&buf);
+ r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL;
+ r.param.path_number.operation = type;
+ r.param.path_number.filename = &buf;
+ r.param.path_number.number = number;
+ do {
+ tomoyo_check_acl(&r, tomoyo_check_path_number_acl);
+ error = tomoyo_audit_path_number_log(&r);
+ } while (error == TOMOYO_RETRY_REQUEST);
+ kfree(buf.name);
+ out:
+ tomoyo_read_unlock(idx);
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_check_open_permission - Check permission for "read" and "write".
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @path: Pointer to "struct path".
+ * @flag: Flags for open().
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
+ const struct path *path, const int flag)
+{
+ const u8 acc_mode = ACC_MODE(flag);
+ int error = 0;
+ struct tomoyo_path_info buf;
+ struct tomoyo_request_info r;
+ struct tomoyo_obj_info obj = {
+ .path1 = { .mnt = path->mnt, .dentry = path->dentry },
+ };
+ int idx;
+
+ buf.name = NULL;
+ r.mode = TOMOYO_CONFIG_DISABLED;
+ idx = tomoyo_read_lock();
+ if (acc_mode &&
+ tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN)
+ != TOMOYO_CONFIG_DISABLED) {
+ if (!tomoyo_get_realpath(&buf, path)) {
+ error = -ENOMEM;
+ goto out;
+ }
+ r.obj = &obj;
+ if (acc_mode & MAY_READ)
+ error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ,
+ &buf);
+ if (!error && (acc_mode & MAY_WRITE))
+ error = tomoyo_path_permission(&r, (flag & O_APPEND) ?
+ TOMOYO_TYPE_APPEND :
+ TOMOYO_TYPE_WRITE,
+ &buf);
+ }
+ out:
+ kfree(buf.name);
+ tomoyo_read_unlock(idx);
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount".
+ *
+ * @operation: Type of operation.
+ * @path: Pointer to "struct path".
+ * @target: Symlink's target if @operation is TOMOYO_TYPE_SYMLINK,
+ * NULL otherwise.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_path_perm(const u8 operation, const struct path *path, const char *target)
+{
+ struct tomoyo_request_info r;
+ struct tomoyo_obj_info obj = {
+ .path1 = { .mnt = path->mnt, .dentry = path->dentry },
+ };
+ int error;
+ struct tomoyo_path_info buf;
+ bool is_enforce;
+ struct tomoyo_path_info symlink_target;
+ int idx;
+
+ if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation])
+ == TOMOYO_CONFIG_DISABLED)
+ return 0;
+ is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING);
+ error = -ENOMEM;
+ buf.name = NULL;
+ idx = tomoyo_read_lock();
+ if (!tomoyo_get_realpath(&buf, path))
+ goto out;
+ r.obj = &obj;
+ switch (operation) {
+ case TOMOYO_TYPE_RMDIR:
+ case TOMOYO_TYPE_CHROOT:
+ tomoyo_add_slash(&buf);
+ break;
+ case TOMOYO_TYPE_SYMLINK:
+ symlink_target.name = tomoyo_encode(target);
+ if (!symlink_target.name)
+ goto out;
+ tomoyo_fill_path_info(&symlink_target);
+ obj.symlink_target = &symlink_target;
+ break;
+ }
+ error = tomoyo_path_permission(&r, operation, &buf);
+ if (operation == TOMOYO_TYPE_SYMLINK)
+ kfree(symlink_target.name);
+ out:
+ kfree(buf.name);
+ tomoyo_read_unlock(idx);
+ if (!is_enforce)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar".
+ *
+ * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
+ * @path: Pointer to "struct path".
+ * @mode: Create mode.
+ * @dev: Device number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
+ const unsigned int mode, unsigned int dev)
+{
+ struct tomoyo_request_info r;
+ struct tomoyo_obj_info obj = {
+ .path1 = { .mnt = path->mnt, .dentry = path->dentry },
+ };
+ int error = -ENOMEM;
+ struct tomoyo_path_info buf;
+ int idx;
+
+ if (tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation])
+ == TOMOYO_CONFIG_DISABLED)
+ return 0;
+ idx = tomoyo_read_lock();
+ error = -ENOMEM;
+ if (tomoyo_get_realpath(&buf, path)) {
+ r.obj = &obj;
+ dev = new_decode_dev(dev);
+ r.param_type = TOMOYO_TYPE_MKDEV_ACL;
+ r.param.mkdev.filename = &buf;
+ r.param.mkdev.operation = operation;
+ r.param.mkdev.mode = mode;
+ r.param.mkdev.major = MAJOR(dev);
+ r.param.mkdev.minor = MINOR(dev);
+ tomoyo_check_acl(&r, tomoyo_check_mkdev_acl);
+ error = tomoyo_audit_mkdev_log(&r);
+ kfree(buf.name);
+ }
+ tomoyo_read_unlock(idx);
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root".
+ *
+ * @operation: Type of operation.
+ * @path1: Pointer to "struct path".
+ * @path2: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_path2_perm(const u8 operation, const struct path *path1,
+ const struct path *path2)
+{
+ int error = -ENOMEM;
+ struct tomoyo_path_info buf1;
+ struct tomoyo_path_info buf2;
+ struct tomoyo_request_info r;
+ struct tomoyo_obj_info obj = {
+ .path1 = { .mnt = path1->mnt, .dentry = path1->dentry },
+ .path2 = { .mnt = path2->mnt, .dentry = path2->dentry }
+ };
+ int idx;
+
+ if (tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation])
+ == TOMOYO_CONFIG_DISABLED)
+ return 0;
+ buf1.name = NULL;
+ buf2.name = NULL;
+ idx = tomoyo_read_lock();
+ if (!tomoyo_get_realpath(&buf1, path1) ||
+ !tomoyo_get_realpath(&buf2, path2))
+ goto out;
+ switch (operation) {
+ case TOMOYO_TYPE_RENAME:
+ case TOMOYO_TYPE_LINK:
+ if (!d_is_dir(path1->dentry))
+ break;
+ fallthrough;
+ case TOMOYO_TYPE_PIVOT_ROOT:
+ tomoyo_add_slash(&buf1);
+ tomoyo_add_slash(&buf2);
+ break;
+ }
+ r.obj = &obj;
+ r.param_type = TOMOYO_TYPE_PATH2_ACL;
+ r.param.path2.operation = operation;
+ r.param.path2.filename1 = &buf1;
+ r.param.path2.filename2 = &buf2;
+ do {
+ tomoyo_check_acl(&r, tomoyo_check_path2_acl);
+ error = tomoyo_audit_path2_log(&r);
+ } while (error == TOMOYO_RETRY_REQUEST);
+ out:
+ kfree(buf1.name);
+ kfree(buf2.name);
+ tomoyo_read_unlock(idx);
+ if (r.mode != TOMOYO_CONFIG_ENFORCING)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_same_mount_acl - Check for duplicated "struct tomoyo_mount_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_mount_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_mount_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) &&
+ tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) &&
+ tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) &&
+ tomoyo_same_number_union(&p1->flags, &p2->flags);
+}
+
+/**
+ * tomoyo_update_mount_acl - Write "struct tomoyo_mount_acl" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_update_mount_acl(struct tomoyo_acl_param *param)
+{
+ struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL };
+ int error;
+
+ if (!tomoyo_parse_name_union(param, &e.dev_name) ||
+ !tomoyo_parse_name_union(param, &e.dir_name) ||
+ !tomoyo_parse_name_union(param, &e.fs_type) ||
+ !tomoyo_parse_number_union(param, &e.flags))
+ error = -EINVAL;
+ else
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_mount_acl, NULL);
+ tomoyo_put_name_union(&e.dev_name);
+ tomoyo_put_name_union(&e.dir_name);
+ tomoyo_put_name_union(&e.fs_type);
+ tomoyo_put_number_union(&e.flags);
+ return error;
+}
+
+/**
+ * tomoyo_write_file - Update file related list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_write_file(struct tomoyo_acl_param *param)
+{
+ u16 perm = 0;
+ u8 type;
+ const char *operation = tomoyo_read_token(param);
+
+ for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++)
+ if (tomoyo_permstr(operation, tomoyo_path_keyword[type]))
+ perm |= 1 << type;
+ if (perm)
+ return tomoyo_update_path_acl(perm, param);
+ for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++)
+ if (tomoyo_permstr(operation,
+ tomoyo_mac_keywords[tomoyo_pp2mac[type]]))
+ perm |= 1 << type;
+ if (perm)
+ return tomoyo_update_path2_acl(perm, param);
+ for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++)
+ if (tomoyo_permstr(operation,
+ tomoyo_mac_keywords[tomoyo_pn2mac[type]]))
+ perm |= 1 << type;
+ if (perm)
+ return tomoyo_update_path_number_acl(perm, param);
+ for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++)
+ if (tomoyo_permstr(operation,
+ tomoyo_mac_keywords[tomoyo_pnnn2mac[type]]))
+ perm |= 1 << type;
+ if (perm)
+ return tomoyo_update_mkdev_acl(perm, param);
+ if (tomoyo_permstr(operation,
+ tomoyo_mac_keywords[TOMOYO_MAC_FILE_MOUNT]))
+ return tomoyo_update_mount_acl(param);
+ return -EINVAL;
+}
diff --git a/security/tomoyo/gc.c b/security/tomoyo/gc.c
new file mode 100644
index 000000000..9537832fc
--- /dev/null
+++ b/security/tomoyo/gc.c
@@ -0,0 +1,670 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/gc.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+#include <linux/kthread.h>
+#include <linux/slab.h>
+
+/**
+ * tomoyo_memory_free - Free memory for elements.
+ *
+ * @ptr: Pointer to allocated memory.
+ *
+ * Returns nothing.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
+ */
+static inline void tomoyo_memory_free(void *ptr)
+{
+ tomoyo_memory_used[TOMOYO_MEMORY_POLICY] -= ksize(ptr);
+ kfree(ptr);
+}
+
+/* The list for "struct tomoyo_io_buffer". */
+static LIST_HEAD(tomoyo_io_buffer_list);
+/* Lock for protecting tomoyo_io_buffer_list. */
+static DEFINE_SPINLOCK(tomoyo_io_buffer_list_lock);
+
+/**
+ * tomoyo_struct_used_by_io_buffer - Check whether the list element is used by /sys/kernel/security/tomoyo/ users or not.
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns true if @element is used by /sys/kernel/security/tomoyo/ users,
+ * false otherwise.
+ */
+static bool tomoyo_struct_used_by_io_buffer(const struct list_head *element)
+{
+ struct tomoyo_io_buffer *head;
+ bool in_use = false;
+
+ spin_lock(&tomoyo_io_buffer_list_lock);
+ list_for_each_entry(head, &tomoyo_io_buffer_list, list) {
+ head->users++;
+ spin_unlock(&tomoyo_io_buffer_list_lock);
+ mutex_lock(&head->io_sem);
+ if (head->r.domain == element || head->r.group == element ||
+ head->r.acl == element || &head->w.domain->list == element)
+ in_use = true;
+ mutex_unlock(&head->io_sem);
+ spin_lock(&tomoyo_io_buffer_list_lock);
+ head->users--;
+ if (in_use)
+ break;
+ }
+ spin_unlock(&tomoyo_io_buffer_list_lock);
+ return in_use;
+}
+
+/**
+ * tomoyo_name_used_by_io_buffer - Check whether the string is used by /sys/kernel/security/tomoyo/ users or not.
+ *
+ * @string: String to check.
+ *
+ * Returns true if @string is used by /sys/kernel/security/tomoyo/ users,
+ * false otherwise.
+ */
+static bool tomoyo_name_used_by_io_buffer(const char *string)
+{
+ struct tomoyo_io_buffer *head;
+ const size_t size = strlen(string) + 1;
+ bool in_use = false;
+
+ spin_lock(&tomoyo_io_buffer_list_lock);
+ list_for_each_entry(head, &tomoyo_io_buffer_list, list) {
+ int i;
+
+ head->users++;
+ spin_unlock(&tomoyo_io_buffer_list_lock);
+ mutex_lock(&head->io_sem);
+ for (i = 0; i < TOMOYO_MAX_IO_READ_QUEUE; i++) {
+ const char *w = head->r.w[i];
+
+ if (w < string || w > string + size)
+ continue;
+ in_use = true;
+ break;
+ }
+ mutex_unlock(&head->io_sem);
+ spin_lock(&tomoyo_io_buffer_list_lock);
+ head->users--;
+ if (in_use)
+ break;
+ }
+ spin_unlock(&tomoyo_io_buffer_list_lock);
+ return in_use;
+}
+
+/**
+ * tomoyo_del_transition_control - Delete members in "struct tomoyo_transition_control".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_transition_control(struct list_head *element)
+{
+ struct tomoyo_transition_control *ptr =
+ container_of(element, typeof(*ptr), head.list);
+
+ tomoyo_put_name(ptr->domainname);
+ tomoyo_put_name(ptr->program);
+}
+
+/**
+ * tomoyo_del_aggregator - Delete members in "struct tomoyo_aggregator".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_aggregator(struct list_head *element)
+{
+ struct tomoyo_aggregator *ptr =
+ container_of(element, typeof(*ptr), head.list);
+
+ tomoyo_put_name(ptr->original_name);
+ tomoyo_put_name(ptr->aggregated_name);
+}
+
+/**
+ * tomoyo_del_manager - Delete members in "struct tomoyo_manager".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_manager(struct list_head *element)
+{
+ struct tomoyo_manager *ptr =
+ container_of(element, typeof(*ptr), head.list);
+
+ tomoyo_put_name(ptr->manager);
+}
+
+/**
+ * tomoyo_del_acl - Delete members in "struct tomoyo_acl_info".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_del_acl(struct list_head *element)
+{
+ struct tomoyo_acl_info *acl =
+ container_of(element, typeof(*acl), list);
+
+ tomoyo_put_condition(acl->cond);
+ switch (acl->type) {
+ case TOMOYO_TYPE_PATH_ACL:
+ {
+ struct tomoyo_path_acl *entry
+ = container_of(acl, typeof(*entry), head);
+ tomoyo_put_name_union(&entry->name);
+ }
+ break;
+ case TOMOYO_TYPE_PATH2_ACL:
+ {
+ struct tomoyo_path2_acl *entry
+ = container_of(acl, typeof(*entry), head);
+ tomoyo_put_name_union(&entry->name1);
+ tomoyo_put_name_union(&entry->name2);
+ }
+ break;
+ case TOMOYO_TYPE_PATH_NUMBER_ACL:
+ {
+ struct tomoyo_path_number_acl *entry
+ = container_of(acl, typeof(*entry), head);
+ tomoyo_put_name_union(&entry->name);
+ tomoyo_put_number_union(&entry->number);
+ }
+ break;
+ case TOMOYO_TYPE_MKDEV_ACL:
+ {
+ struct tomoyo_mkdev_acl *entry
+ = container_of(acl, typeof(*entry), head);
+ tomoyo_put_name_union(&entry->name);
+ tomoyo_put_number_union(&entry->mode);
+ tomoyo_put_number_union(&entry->major);
+ tomoyo_put_number_union(&entry->minor);
+ }
+ break;
+ case TOMOYO_TYPE_MOUNT_ACL:
+ {
+ struct tomoyo_mount_acl *entry
+ = container_of(acl, typeof(*entry), head);
+ tomoyo_put_name_union(&entry->dev_name);
+ tomoyo_put_name_union(&entry->dir_name);
+ tomoyo_put_name_union(&entry->fs_type);
+ tomoyo_put_number_union(&entry->flags);
+ }
+ break;
+ case TOMOYO_TYPE_ENV_ACL:
+ {
+ struct tomoyo_env_acl *entry =
+ container_of(acl, typeof(*entry), head);
+
+ tomoyo_put_name(entry->env);
+ }
+ break;
+ case TOMOYO_TYPE_INET_ACL:
+ {
+ struct tomoyo_inet_acl *entry =
+ container_of(acl, typeof(*entry), head);
+
+ tomoyo_put_group(entry->address.group);
+ tomoyo_put_number_union(&entry->port);
+ }
+ break;
+ case TOMOYO_TYPE_UNIX_ACL:
+ {
+ struct tomoyo_unix_acl *entry =
+ container_of(acl, typeof(*entry), head);
+
+ tomoyo_put_name_union(&entry->name);
+ }
+ break;
+ case TOMOYO_TYPE_MANUAL_TASK_ACL:
+ {
+ struct tomoyo_task_acl *entry =
+ container_of(acl, typeof(*entry), head);
+
+ tomoyo_put_name(entry->domainname);
+ }
+ break;
+ }
+}
+
+/**
+ * tomoyo_del_domain - Delete members in "struct tomoyo_domain_info".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
+ */
+static inline void tomoyo_del_domain(struct list_head *element)
+{
+ struct tomoyo_domain_info *domain =
+ container_of(element, typeof(*domain), list);
+ struct tomoyo_acl_info *acl;
+ struct tomoyo_acl_info *tmp;
+
+ /*
+ * Since this domain is referenced from neither
+ * "struct tomoyo_io_buffer" nor "struct cred"->security, we can delete
+ * elements without checking for is_deleted flag.
+ */
+ list_for_each_entry_safe(acl, tmp, &domain->acl_info_list, list) {
+ tomoyo_del_acl(&acl->list);
+ tomoyo_memory_free(acl);
+ }
+ tomoyo_put_name(domain->domainname);
+}
+
+/**
+ * tomoyo_del_condition - Delete members in "struct tomoyo_condition".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+void tomoyo_del_condition(struct list_head *element)
+{
+ struct tomoyo_condition *cond = container_of(element, typeof(*cond),
+ head.list);
+ const u16 condc = cond->condc;
+ const u16 numbers_count = cond->numbers_count;
+ const u16 names_count = cond->names_count;
+ const u16 argc = cond->argc;
+ const u16 envc = cond->envc;
+ unsigned int i;
+ const struct tomoyo_condition_element *condp
+ = (const struct tomoyo_condition_element *) (cond + 1);
+ struct tomoyo_number_union *numbers_p
+ = (struct tomoyo_number_union *) (condp + condc);
+ struct tomoyo_name_union *names_p
+ = (struct tomoyo_name_union *) (numbers_p + numbers_count);
+ const struct tomoyo_argv *argv
+ = (const struct tomoyo_argv *) (names_p + names_count);
+ const struct tomoyo_envp *envp
+ = (const struct tomoyo_envp *) (argv + argc);
+
+ for (i = 0; i < numbers_count; i++)
+ tomoyo_put_number_union(numbers_p++);
+ for (i = 0; i < names_count; i++)
+ tomoyo_put_name_union(names_p++);
+ for (i = 0; i < argc; argv++, i++)
+ tomoyo_put_name(argv->value);
+ for (i = 0; i < envc; envp++, i++) {
+ tomoyo_put_name(envp->name);
+ tomoyo_put_name(envp->value);
+ }
+}
+
+/**
+ * tomoyo_del_name - Delete members in "struct tomoyo_name".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_name(struct list_head *element)
+{
+ /* Nothing to do. */
+}
+
+/**
+ * tomoyo_del_path_group - Delete members in "struct tomoyo_path_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_path_group(struct list_head *element)
+{
+ struct tomoyo_path_group *member =
+ container_of(element, typeof(*member), head.list);
+
+ tomoyo_put_name(member->member_name);
+}
+
+/**
+ * tomoyo_del_group - Delete "struct tomoyo_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_group(struct list_head *element)
+{
+ struct tomoyo_group *group =
+ container_of(element, typeof(*group), head.list);
+
+ tomoyo_put_name(group->group_name);
+}
+
+/**
+ * tomoyo_del_address_group - Delete members in "struct tomoyo_address_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_address_group(struct list_head *element)
+{
+ /* Nothing to do. */
+}
+
+/**
+ * tomoyo_del_number_group - Delete members in "struct tomoyo_number_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_number_group(struct list_head *element)
+{
+ /* Nothing to do. */
+}
+
+/**
+ * tomoyo_try_to_gc - Try to kfree() an entry.
+ *
+ * @type: One of values in "enum tomoyo_policy_id".
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
+ */
+static void tomoyo_try_to_gc(const enum tomoyo_policy_id type,
+ struct list_head *element)
+{
+ /*
+ * __list_del_entry() guarantees that the list element became no longer
+ * reachable from the list which the element was originally on (e.g.
+ * tomoyo_domain_list). Also, synchronize_srcu() guarantees that the
+ * list element became no longer referenced by syscall users.
+ */
+ __list_del_entry(element);
+ mutex_unlock(&tomoyo_policy_lock);
+ synchronize_srcu(&tomoyo_ss);
+ /*
+ * However, there are two users which may still be using the list
+ * element. We need to defer until both users forget this element.
+ *
+ * Don't kfree() until "struct tomoyo_io_buffer"->r.{domain,group,acl}
+ * and "struct tomoyo_io_buffer"->w.domain forget this element.
+ */
+ if (tomoyo_struct_used_by_io_buffer(element))
+ goto reinject;
+ switch (type) {
+ case TOMOYO_ID_TRANSITION_CONTROL:
+ tomoyo_del_transition_control(element);
+ break;
+ case TOMOYO_ID_MANAGER:
+ tomoyo_del_manager(element);
+ break;
+ case TOMOYO_ID_AGGREGATOR:
+ tomoyo_del_aggregator(element);
+ break;
+ case TOMOYO_ID_GROUP:
+ tomoyo_del_group(element);
+ break;
+ case TOMOYO_ID_PATH_GROUP:
+ tomoyo_del_path_group(element);
+ break;
+ case TOMOYO_ID_ADDRESS_GROUP:
+ tomoyo_del_address_group(element);
+ break;
+ case TOMOYO_ID_NUMBER_GROUP:
+ tomoyo_del_number_group(element);
+ break;
+ case TOMOYO_ID_CONDITION:
+ tomoyo_del_condition(element);
+ break;
+ case TOMOYO_ID_NAME:
+ /*
+ * Don't kfree() until all "struct tomoyo_io_buffer"->r.w[]
+ * forget this element.
+ */
+ if (tomoyo_name_used_by_io_buffer
+ (container_of(element, typeof(struct tomoyo_name),
+ head.list)->entry.name))
+ goto reinject;
+ tomoyo_del_name(element);
+ break;
+ case TOMOYO_ID_ACL:
+ tomoyo_del_acl(element);
+ break;
+ case TOMOYO_ID_DOMAIN:
+ /*
+ * Don't kfree() until all "struct cred"->security forget this
+ * element.
+ */
+ if (atomic_read(&container_of
+ (element, typeof(struct tomoyo_domain_info),
+ list)->users))
+ goto reinject;
+ break;
+ case TOMOYO_MAX_POLICY:
+ break;
+ }
+ mutex_lock(&tomoyo_policy_lock);
+ if (type == TOMOYO_ID_DOMAIN)
+ tomoyo_del_domain(element);
+ tomoyo_memory_free(element);
+ return;
+reinject:
+ /*
+ * We can safely reinject this element here bacause
+ * (1) Appending list elements and removing list elements are protected
+ * by tomoyo_policy_lock mutex.
+ * (2) Only this function removes list elements and this function is
+ * exclusively executed by tomoyo_gc_mutex mutex.
+ * are true.
+ */
+ mutex_lock(&tomoyo_policy_lock);
+ list_add_rcu(element, element->prev);
+}
+
+/**
+ * tomoyo_collect_member - Delete elements with "struct tomoyo_acl_head".
+ *
+ * @id: One of values in "enum tomoyo_policy_id".
+ * @member_list: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_collect_member(const enum tomoyo_policy_id id,
+ struct list_head *member_list)
+{
+ struct tomoyo_acl_head *member;
+ struct tomoyo_acl_head *tmp;
+
+ list_for_each_entry_safe(member, tmp, member_list, list) {
+ if (!member->is_deleted)
+ continue;
+ member->is_deleted = TOMOYO_GC_IN_PROGRESS;
+ tomoyo_try_to_gc(id, &member->list);
+ }
+}
+
+/**
+ * tomoyo_collect_acl - Delete elements in "struct tomoyo_domain_info".
+ *
+ * @list: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_collect_acl(struct list_head *list)
+{
+ struct tomoyo_acl_info *acl;
+ struct tomoyo_acl_info *tmp;
+
+ list_for_each_entry_safe(acl, tmp, list, list) {
+ if (!acl->is_deleted)
+ continue;
+ acl->is_deleted = TOMOYO_GC_IN_PROGRESS;
+ tomoyo_try_to_gc(TOMOYO_ID_ACL, &acl->list);
+ }
+}
+
+/**
+ * tomoyo_collect_entry - Try to kfree() deleted elements.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_collect_entry(void)
+{
+ int i;
+ enum tomoyo_policy_id id;
+ struct tomoyo_policy_namespace *ns;
+
+ mutex_lock(&tomoyo_policy_lock);
+ {
+ struct tomoyo_domain_info *domain;
+ struct tomoyo_domain_info *tmp;
+
+ list_for_each_entry_safe(domain, tmp, &tomoyo_domain_list,
+ list) {
+ tomoyo_collect_acl(&domain->acl_info_list);
+ if (!domain->is_deleted || atomic_read(&domain->users))
+ continue;
+ tomoyo_try_to_gc(TOMOYO_ID_DOMAIN, &domain->list);
+ }
+ }
+ list_for_each_entry(ns, &tomoyo_namespace_list, namespace_list) {
+ for (id = 0; id < TOMOYO_MAX_POLICY; id++)
+ tomoyo_collect_member(id, &ns->policy_list[id]);
+ for (i = 0; i < TOMOYO_MAX_ACL_GROUPS; i++)
+ tomoyo_collect_acl(&ns->acl_group[i]);
+ }
+ {
+ struct tomoyo_shared_acl_head *ptr;
+ struct tomoyo_shared_acl_head *tmp;
+
+ list_for_each_entry_safe(ptr, tmp, &tomoyo_condition_list,
+ list) {
+ if (atomic_read(&ptr->users) > 0)
+ continue;
+ atomic_set(&ptr->users, TOMOYO_GC_IN_PROGRESS);
+ tomoyo_try_to_gc(TOMOYO_ID_CONDITION, &ptr->list);
+ }
+ }
+ list_for_each_entry(ns, &tomoyo_namespace_list, namespace_list) {
+ for (i = 0; i < TOMOYO_MAX_GROUP; i++) {
+ struct list_head *list = &ns->group_list[i];
+ struct tomoyo_group *group;
+ struct tomoyo_group *tmp;
+
+ switch (i) {
+ case 0:
+ id = TOMOYO_ID_PATH_GROUP;
+ break;
+ case 1:
+ id = TOMOYO_ID_NUMBER_GROUP;
+ break;
+ default:
+ id = TOMOYO_ID_ADDRESS_GROUP;
+ break;
+ }
+ list_for_each_entry_safe(group, tmp, list, head.list) {
+ tomoyo_collect_member(id, &group->member_list);
+ if (!list_empty(&group->member_list) ||
+ atomic_read(&group->head.users) > 0)
+ continue;
+ atomic_set(&group->head.users,
+ TOMOYO_GC_IN_PROGRESS);
+ tomoyo_try_to_gc(TOMOYO_ID_GROUP,
+ &group->head.list);
+ }
+ }
+ }
+ for (i = 0; i < TOMOYO_MAX_HASH; i++) {
+ struct list_head *list = &tomoyo_name_list[i];
+ struct tomoyo_shared_acl_head *ptr;
+ struct tomoyo_shared_acl_head *tmp;
+
+ list_for_each_entry_safe(ptr, tmp, list, list) {
+ if (atomic_read(&ptr->users) > 0)
+ continue;
+ atomic_set(&ptr->users, TOMOYO_GC_IN_PROGRESS);
+ tomoyo_try_to_gc(TOMOYO_ID_NAME, &ptr->list);
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+}
+
+/**
+ * tomoyo_gc_thread - Garbage collector thread function.
+ *
+ * @unused: Unused.
+ *
+ * Returns 0.
+ */
+static int tomoyo_gc_thread(void *unused)
+{
+ /* Garbage collector thread is exclusive. */
+ static DEFINE_MUTEX(tomoyo_gc_mutex);
+
+ if (!mutex_trylock(&tomoyo_gc_mutex))
+ goto out;
+ tomoyo_collect_entry();
+ {
+ struct tomoyo_io_buffer *head;
+ struct tomoyo_io_buffer *tmp;
+
+ spin_lock(&tomoyo_io_buffer_list_lock);
+ list_for_each_entry_safe(head, tmp, &tomoyo_io_buffer_list,
+ list) {
+ if (head->users)
+ continue;
+ list_del(&head->list);
+ kfree(head->read_buf);
+ kfree(head->write_buf);
+ kfree(head);
+ }
+ spin_unlock(&tomoyo_io_buffer_list_lock);
+ }
+ mutex_unlock(&tomoyo_gc_mutex);
+out:
+ /* This acts as do_exit(0). */
+ return 0;
+}
+
+/**
+ * tomoyo_notify_gc - Register/unregister /sys/kernel/security/tomoyo/ users.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @is_register: True if register, false if unregister.
+ *
+ * Returns nothing.
+ */
+void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register)
+{
+ bool is_write = false;
+
+ spin_lock(&tomoyo_io_buffer_list_lock);
+ if (is_register) {
+ head->users = 1;
+ list_add(&head->list, &tomoyo_io_buffer_list);
+ } else {
+ is_write = head->write_buf != NULL;
+ if (!--head->users) {
+ list_del(&head->list);
+ kfree(head->read_buf);
+ kfree(head->write_buf);
+ kfree(head);
+ }
+ }
+ spin_unlock(&tomoyo_io_buffer_list_lock);
+ if (is_write)
+ kthread_run(tomoyo_gc_thread, NULL, "GC for TOMOYO");
+}
diff --git a/security/tomoyo/group.c b/security/tomoyo/group.c
new file mode 100644
index 000000000..1cecdd797
--- /dev/null
+++ b/security/tomoyo/group.c
@@ -0,0 +1,209 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/group.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/slab.h>
+#include <linux/rculist.h>
+
+#include "common.h"
+
+/**
+ * tomoyo_same_path_group - Check for duplicated "struct tomoyo_path_group" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_head".
+ * @b: Pointer to "struct tomoyo_acl_head".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ return container_of(a, struct tomoyo_path_group, head)->member_name ==
+ container_of(b, struct tomoyo_path_group, head)->member_name;
+}
+
+/**
+ * tomoyo_same_number_group - Check for duplicated "struct tomoyo_number_group" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_head".
+ * @b: Pointer to "struct tomoyo_acl_head".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ return !memcmp(&container_of(a, struct tomoyo_number_group, head)
+ ->number,
+ &container_of(b, struct tomoyo_number_group, head)
+ ->number,
+ sizeof(container_of(a, struct tomoyo_number_group, head)
+ ->number));
+}
+
+/**
+ * tomoyo_same_address_group - Check for duplicated "struct tomoyo_address_group" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_head".
+ * @b: Pointer to "struct tomoyo_acl_head".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_address_group(const struct tomoyo_acl_head *a,
+ const struct tomoyo_acl_head *b)
+{
+ const struct tomoyo_address_group *p1 = container_of(a, typeof(*p1),
+ head);
+ const struct tomoyo_address_group *p2 = container_of(b, typeof(*p2),
+ head);
+
+ return tomoyo_same_ipaddr_union(&p1->address, &p2->address);
+}
+
+/**
+ * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @type: Type of this group.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type)
+{
+ struct tomoyo_group *group = tomoyo_get_group(param, type);
+ int error = -EINVAL;
+
+ if (!group)
+ return -ENOMEM;
+ param->list = &group->member_list;
+ if (type == TOMOYO_PATH_GROUP) {
+ struct tomoyo_path_group e = { };
+
+ e.member_name = tomoyo_get_name(tomoyo_read_token(param));
+ if (!e.member_name) {
+ error = -ENOMEM;
+ goto out;
+ }
+ error = tomoyo_update_policy(&e.head, sizeof(e), param,
+ tomoyo_same_path_group);
+ tomoyo_put_name(e.member_name);
+ } else if (type == TOMOYO_NUMBER_GROUP) {
+ struct tomoyo_number_group e = { };
+
+ if (param->data[0] == '@' ||
+ !tomoyo_parse_number_union(param, &e.number))
+ goto out;
+ error = tomoyo_update_policy(&e.head, sizeof(e), param,
+ tomoyo_same_number_group);
+ /*
+ * tomoyo_put_number_union() is not needed because
+ * param->data[0] != '@'.
+ */
+ } else {
+ struct tomoyo_address_group e = { };
+
+ if (param->data[0] == '@' ||
+ !tomoyo_parse_ipaddr_union(param, &e.address))
+ goto out;
+ error = tomoyo_update_policy(&e.head, sizeof(e), param,
+ tomoyo_same_address_group);
+ }
+out:
+ tomoyo_put_group(group);
+ return error;
+}
+
+/**
+ * tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
+ *
+ * @pathname: The name of pathname.
+ * @group: Pointer to "struct tomoyo_path_group".
+ *
+ * Returns matched member's pathname if @pathname matches pathnames in @group,
+ * NULL otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+const struct tomoyo_path_info *
+tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
+ const struct tomoyo_group *group)
+{
+ struct tomoyo_path_group *member;
+
+ list_for_each_entry_rcu(member, &group->member_list, head.list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (member->head.is_deleted)
+ continue;
+ if (!tomoyo_path_matches_pattern(pathname, member->member_name))
+ continue;
+ return member->member_name;
+ }
+ return NULL;
+}
+
+/**
+ * tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
+ *
+ * @min: Min number.
+ * @max: Max number.
+ * @group: Pointer to "struct tomoyo_number_group".
+ *
+ * Returns true if @min and @max partially overlaps @group, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+bool tomoyo_number_matches_group(const unsigned long min,
+ const unsigned long max,
+ const struct tomoyo_group *group)
+{
+ struct tomoyo_number_group *member;
+ bool matched = false;
+
+ list_for_each_entry_rcu(member, &group->member_list, head.list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (member->head.is_deleted)
+ continue;
+ if (min > member->number.values[1] ||
+ max < member->number.values[0])
+ continue;
+ matched = true;
+ break;
+ }
+ return matched;
+}
+
+/**
+ * tomoyo_address_matches_group - Check whether the given address matches members of the given address group.
+ *
+ * @is_ipv6: True if @address is an IPv6 address.
+ * @address: An IPv4 or IPv6 address.
+ * @group: Pointer to "struct tomoyo_address_group".
+ *
+ * Returns true if @address matches addresses in @group group, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
+ const struct tomoyo_group *group)
+{
+ struct tomoyo_address_group *member;
+ bool matched = false;
+ const u8 size = is_ipv6 ? 16 : 4;
+
+ list_for_each_entry_rcu(member, &group->member_list, head.list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (member->head.is_deleted)
+ continue;
+ if (member->address.is_ipv6 != is_ipv6)
+ continue;
+ if (memcmp(&member->address.ip[0], address, size) > 0 ||
+ memcmp(address, &member->address.ip[1], size) > 0)
+ continue;
+ matched = true;
+ break;
+ }
+ return matched;
+}
diff --git a/security/tomoyo/load_policy.c b/security/tomoyo/load_policy.c
new file mode 100644
index 000000000..363b65be8
--- /dev/null
+++ b/security/tomoyo/load_policy.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/load_policy.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+
+#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+
+/*
+ * Path to the policy loader. (default = CONFIG_SECURITY_TOMOYO_POLICY_LOADER)
+ */
+static const char *tomoyo_loader;
+
+/**
+ * tomoyo_loader_setup - Set policy loader.
+ *
+ * @str: Program to use as a policy loader (e.g. /sbin/tomoyo-init ).
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_loader_setup(char *str)
+{
+ tomoyo_loader = str;
+ return 1;
+}
+
+__setup("TOMOYO_loader=", tomoyo_loader_setup);
+
+/**
+ * tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
+ *
+ * Returns true if /sbin/tomoyo-init exists, false otherwise.
+ */
+static bool tomoyo_policy_loader_exists(void)
+{
+ struct path path;
+
+ if (!tomoyo_loader)
+ tomoyo_loader = CONFIG_SECURITY_TOMOYO_POLICY_LOADER;
+ if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
+ pr_info("Not activating Mandatory Access Control as %s does not exist.\n",
+ tomoyo_loader);
+ return false;
+ }
+ path_put(&path);
+ return true;
+}
+
+/*
+ * Path to the trigger. (default = CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER)
+ */
+static const char *tomoyo_trigger;
+
+/**
+ * tomoyo_trigger_setup - Set trigger for activation.
+ *
+ * @str: Program to use as an activation trigger (e.g. /sbin/init ).
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_trigger_setup(char *str)
+{
+ tomoyo_trigger = str;
+ return 1;
+}
+
+__setup("TOMOYO_trigger=", tomoyo_trigger_setup);
+
+/**
+ * tomoyo_load_policy - Run external policy loader to load policy.
+ *
+ * @filename: The program about to start.
+ *
+ * This function checks whether @filename is /sbin/init , and if so
+ * invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init
+ * and then continues invocation of /sbin/init.
+ * /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and
+ * writes to /sys/kernel/security/tomoyo/ interfaces.
+ *
+ * Returns nothing.
+ */
+void tomoyo_load_policy(const char *filename)
+{
+ static bool done;
+ char *argv[2];
+ char *envp[3];
+
+ if (tomoyo_policy_loaded || done)
+ return;
+ if (!tomoyo_trigger)
+ tomoyo_trigger = CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER;
+ if (strcmp(filename, tomoyo_trigger))
+ return;
+ if (!tomoyo_policy_loader_exists())
+ return;
+ done = true;
+ pr_info("Calling %s to load policy. Please wait.\n", tomoyo_loader);
+ argv[0] = (char *) tomoyo_loader;
+ argv[1] = NULL;
+ envp[0] = "HOME=/";
+ envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+ envp[2] = NULL;
+ call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
+ tomoyo_check_profile();
+}
+
+#endif
diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c
new file mode 100644
index 000000000..2e7fcfa92
--- /dev/null
+++ b/security/tomoyo/memory.c
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/memory.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/hash.h>
+#include <linux/slab.h>
+#include "common.h"
+
+/**
+ * tomoyo_warn_oom - Print out of memory warning message.
+ *
+ * @function: Function's name.
+ */
+void tomoyo_warn_oom(const char *function)
+{
+ /* Reduce error messages. */
+ static pid_t tomoyo_last_pid;
+ const pid_t pid = current->pid;
+
+ if (tomoyo_last_pid != pid) {
+ pr_warn("ERROR: Out of memory at %s.\n", function);
+ tomoyo_last_pid = pid;
+ }
+ if (!tomoyo_policy_loaded)
+ panic("MAC Initialization failed.\n");
+}
+
+/* Memoy currently used by policy/audit log/query. */
+unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
+/* Memory quota for "policy"/"audit log"/"query". */
+unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
+
+/**
+ * tomoyo_memory_ok - Check memory quota.
+ *
+ * @ptr: Pointer to allocated memory.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Returns true if @ptr is not NULL and quota not exceeded, false otherwise.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
+ */
+bool tomoyo_memory_ok(void *ptr)
+{
+ if (ptr) {
+ const size_t s = ksize(ptr);
+
+ tomoyo_memory_used[TOMOYO_MEMORY_POLICY] += s;
+ if (!tomoyo_memory_quota[TOMOYO_MEMORY_POLICY] ||
+ tomoyo_memory_used[TOMOYO_MEMORY_POLICY] <=
+ tomoyo_memory_quota[TOMOYO_MEMORY_POLICY])
+ return true;
+ tomoyo_memory_used[TOMOYO_MEMORY_POLICY] -= s;
+ }
+ tomoyo_warn_oom(__func__);
+ return false;
+}
+
+/**
+ * tomoyo_commit_ok - Check memory quota.
+ *
+ * @data: Data to copy from.
+ * @size: Size in byte.
+ *
+ * Returns pointer to allocated memory on success, NULL otherwise.
+ * @data is zero-cleared on success.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
+ */
+void *tomoyo_commit_ok(void *data, const unsigned int size)
+{
+ void *ptr = kzalloc(size, GFP_NOFS);
+
+ if (tomoyo_memory_ok(ptr)) {
+ memmove(ptr, data, size);
+ memset(data, 0, size);
+ return ptr;
+ }
+ kfree(ptr);
+ return NULL;
+}
+
+/**
+ * tomoyo_get_group - Allocate memory for "struct tomoyo_path_group"/"struct tomoyo_number_group".
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @idx: Index number.
+ *
+ * Returns pointer to "struct tomoyo_group" on success, NULL otherwise.
+ */
+struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
+ const u8 idx)
+{
+ struct tomoyo_group e = { };
+ struct tomoyo_group *group = NULL;
+ struct list_head *list;
+ const char *group_name = tomoyo_read_token(param);
+ bool found = false;
+
+ if (!tomoyo_correct_word(group_name) || idx >= TOMOYO_MAX_GROUP)
+ return NULL;
+ e.group_name = tomoyo_get_name(group_name);
+ if (!e.group_name)
+ return NULL;
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
+ list = &param->ns->group_list[idx];
+ list_for_each_entry(group, list, head.list) {
+ if (e.group_name != group->group_name ||
+ atomic_read(&group->head.users) == TOMOYO_GC_IN_PROGRESS)
+ continue;
+ atomic_inc(&group->head.users);
+ found = true;
+ break;
+ }
+ if (!found) {
+ struct tomoyo_group *entry = tomoyo_commit_ok(&e, sizeof(e));
+
+ if (entry) {
+ INIT_LIST_HEAD(&entry->member_list);
+ atomic_set(&entry->head.users, 1);
+ list_add_tail_rcu(&entry->head.list, list);
+ group = entry;
+ found = true;
+ }
+ }
+ mutex_unlock(&tomoyo_policy_lock);
+out:
+ tomoyo_put_name(e.group_name);
+ return found ? group : NULL;
+}
+
+/*
+ * tomoyo_name_list is used for holding string data used by TOMOYO.
+ * Since same string data is likely used for multiple times (e.g.
+ * "/lib/libc-2.5.so"), TOMOYO shares string data in the form of
+ * "const struct tomoyo_path_info *".
+ */
+struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
+
+/**
+ * tomoyo_get_name - Allocate permanent memory for string data.
+ *
+ * @name: The string to store into the permernent memory.
+ *
+ * Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
+ */
+const struct tomoyo_path_info *tomoyo_get_name(const char *name)
+{
+ struct tomoyo_name *ptr;
+ unsigned int hash;
+ int len;
+ struct list_head *head;
+
+ if (!name)
+ return NULL;
+ len = strlen(name) + 1;
+ hash = full_name_hash(NULL, (const unsigned char *) name, len - 1);
+ head = &tomoyo_name_list[hash_long(hash, TOMOYO_HASH_BITS)];
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ return NULL;
+ list_for_each_entry(ptr, head, head.list) {
+ if (hash != ptr->entry.hash || strcmp(name, ptr->entry.name) ||
+ atomic_read(&ptr->head.users) == TOMOYO_GC_IN_PROGRESS)
+ continue;
+ atomic_inc(&ptr->head.users);
+ goto out;
+ }
+ ptr = kzalloc(sizeof(*ptr) + len, GFP_NOFS);
+ if (tomoyo_memory_ok(ptr)) {
+ ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
+ memmove((char *) ptr->entry.name, name, len);
+ atomic_set(&ptr->head.users, 1);
+ tomoyo_fill_path_info(&ptr->entry);
+ list_add_tail(&ptr->head.list, head);
+ } else {
+ kfree(ptr);
+ ptr = NULL;
+ }
+out:
+ mutex_unlock(&tomoyo_policy_lock);
+ return ptr ? &ptr->entry : NULL;
+}
+
+/* Initial namespace.*/
+struct tomoyo_policy_namespace tomoyo_kernel_namespace;
+
+/**
+ * tomoyo_mm_init - Initialize mm related code.
+ */
+void __init tomoyo_mm_init(void)
+{
+ int idx;
+
+ for (idx = 0; idx < TOMOYO_MAX_HASH; idx++)
+ INIT_LIST_HEAD(&tomoyo_name_list[idx]);
+ tomoyo_kernel_namespace.name = "<kernel>";
+ tomoyo_init_policy_namespace(&tomoyo_kernel_namespace);
+ tomoyo_kernel_domain.ns = &tomoyo_kernel_namespace;
+ INIT_LIST_HEAD(&tomoyo_kernel_domain.acl_info_list);
+ tomoyo_kernel_domain.domainname = tomoyo_get_name("<kernel>");
+ list_add_tail_rcu(&tomoyo_kernel_domain.list, &tomoyo_domain_list);
+}
diff --git a/security/tomoyo/mount.c b/security/tomoyo/mount.c
new file mode 100644
index 000000000..2755971f5
--- /dev/null
+++ b/security/tomoyo/mount.c
@@ -0,0 +1,240 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/mount.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/slab.h>
+#include <uapi/linux/mount.h>
+#include "common.h"
+
+/* String table for special mount operations. */
+static const char * const tomoyo_mounts[TOMOYO_MAX_SPECIAL_MOUNT] = {
+ [TOMOYO_MOUNT_BIND] = "--bind",
+ [TOMOYO_MOUNT_MOVE] = "--move",
+ [TOMOYO_MOUNT_REMOUNT] = "--remount",
+ [TOMOYO_MOUNT_MAKE_UNBINDABLE] = "--make-unbindable",
+ [TOMOYO_MOUNT_MAKE_PRIVATE] = "--make-private",
+ [TOMOYO_MOUNT_MAKE_SLAVE] = "--make-slave",
+ [TOMOYO_MOUNT_MAKE_SHARED] = "--make-shared",
+};
+
+/**
+ * tomoyo_audit_mount_log - Audit mount log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_mount_log(struct tomoyo_request_info *r)
+{
+ return tomoyo_supervisor(r, "file mount %s %s %s 0x%lX\n",
+ r->param.mount.dev->name,
+ r->param.mount.dir->name,
+ r->param.mount.type->name,
+ r->param.mount.flags);
+}
+
+/**
+ * tomoyo_check_mount_acl - Check permission for path path path number operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_mount_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_mount_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+
+ return tomoyo_compare_number_union(r->param.mount.flags,
+ &acl->flags) &&
+ tomoyo_compare_name_union(r->param.mount.type,
+ &acl->fs_type) &&
+ tomoyo_compare_name_union(r->param.mount.dir,
+ &acl->dir_name) &&
+ (!r->param.mount.need_dev ||
+ tomoyo_compare_name_union(r->param.mount.dev,
+ &acl->dev_name));
+}
+
+/**
+ * tomoyo_mount_acl - Check permission for mount() operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @dev_name: Name of device file. Maybe NULL.
+ * @dir: Pointer to "struct path".
+ * @type: Name of filesystem type.
+ * @flags: Mount options.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_mount_acl(struct tomoyo_request_info *r,
+ const char *dev_name,
+ const struct path *dir, const char *type,
+ unsigned long flags)
+{
+ struct tomoyo_obj_info obj = { };
+ struct path path;
+ struct file_system_type *fstype = NULL;
+ const char *requested_type = NULL;
+ const char *requested_dir_name = NULL;
+ const char *requested_dev_name = NULL;
+ struct tomoyo_path_info rtype;
+ struct tomoyo_path_info rdev;
+ struct tomoyo_path_info rdir;
+ int need_dev = 0;
+ int error = -ENOMEM;
+
+ r->obj = &obj;
+
+ /* Get fstype. */
+ requested_type = tomoyo_encode(type);
+ if (!requested_type)
+ goto out;
+ rtype.name = requested_type;
+ tomoyo_fill_path_info(&rtype);
+
+ /* Get mount point. */
+ obj.path2 = *dir;
+ requested_dir_name = tomoyo_realpath_from_path(dir);
+ if (!requested_dir_name) {
+ error = -ENOMEM;
+ goto out;
+ }
+ rdir.name = requested_dir_name;
+ tomoyo_fill_path_info(&rdir);
+
+ /* Compare fs name. */
+ if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT]) {
+ /* dev_name is ignored. */
+ } else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] ||
+ type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] ||
+ type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] ||
+ type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED]) {
+ /* dev_name is ignored. */
+ } else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND] ||
+ type == tomoyo_mounts[TOMOYO_MOUNT_MOVE]) {
+ need_dev = -1; /* dev_name is a directory */
+ } else {
+ fstype = get_fs_type(type);
+ if (!fstype) {
+ error = -ENODEV;
+ goto out;
+ }
+ if (fstype->fs_flags & FS_REQUIRES_DEV)
+ /* dev_name is a block device file. */
+ need_dev = 1;
+ }
+ if (need_dev) {
+ /* Get mount point or device file. */
+ if (!dev_name || kern_path(dev_name, LOOKUP_FOLLOW, &path)) {
+ error = -ENOENT;
+ goto out;
+ }
+ obj.path1 = path;
+ requested_dev_name = tomoyo_realpath_from_path(&path);
+ if (!requested_dev_name) {
+ error = -ENOENT;
+ goto out;
+ }
+ } else {
+ /* Map dev_name to "<NULL>" if no dev_name given. */
+ if (!dev_name)
+ dev_name = "<NULL>";
+ requested_dev_name = tomoyo_encode(dev_name);
+ if (!requested_dev_name) {
+ error = -ENOMEM;
+ goto out;
+ }
+ }
+ rdev.name = requested_dev_name;
+ tomoyo_fill_path_info(&rdev);
+ r->param_type = TOMOYO_TYPE_MOUNT_ACL;
+ r->param.mount.need_dev = need_dev;
+ r->param.mount.dev = &rdev;
+ r->param.mount.dir = &rdir;
+ r->param.mount.type = &rtype;
+ r->param.mount.flags = flags;
+ do {
+ tomoyo_check_acl(r, tomoyo_check_mount_acl);
+ error = tomoyo_audit_mount_log(r);
+ } while (error == TOMOYO_RETRY_REQUEST);
+ out:
+ kfree(requested_dev_name);
+ kfree(requested_dir_name);
+ if (fstype)
+ put_filesystem(fstype);
+ kfree(requested_type);
+ /* Drop refcount obtained by kern_path(). */
+ if (obj.path1.dentry)
+ path_put(&obj.path1);
+ return error;
+}
+
+/**
+ * tomoyo_mount_permission - Check permission for mount() operation.
+ *
+ * @dev_name: Name of device file. Maybe NULL.
+ * @path: Pointer to "struct path".
+ * @type: Name of filesystem type. Maybe NULL.
+ * @flags: Mount options.
+ * @data_page: Optional data. Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_mount_permission(const char *dev_name, const struct path *path,
+ const char *type, unsigned long flags,
+ void *data_page)
+{
+ struct tomoyo_request_info r;
+ int error;
+ int idx;
+
+ if (tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_MOUNT)
+ == TOMOYO_CONFIG_DISABLED)
+ return 0;
+ if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
+ flags &= ~MS_MGC_MSK;
+ if (flags & MS_REMOUNT) {
+ type = tomoyo_mounts[TOMOYO_MOUNT_REMOUNT];
+ flags &= ~MS_REMOUNT;
+ } else if (flags & MS_BIND) {
+ type = tomoyo_mounts[TOMOYO_MOUNT_BIND];
+ flags &= ~MS_BIND;
+ } else if (flags & MS_SHARED) {
+ if (flags & (MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
+ return -EINVAL;
+ type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED];
+ flags &= ~MS_SHARED;
+ } else if (flags & MS_PRIVATE) {
+ if (flags & (MS_SHARED | MS_SLAVE | MS_UNBINDABLE))
+ return -EINVAL;
+ type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE];
+ flags &= ~MS_PRIVATE;
+ } else if (flags & MS_SLAVE) {
+ if (flags & (MS_SHARED | MS_PRIVATE | MS_UNBINDABLE))
+ return -EINVAL;
+ type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE];
+ flags &= ~MS_SLAVE;
+ } else if (flags & MS_UNBINDABLE) {
+ if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE))
+ return -EINVAL;
+ type = tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE];
+ flags &= ~MS_UNBINDABLE;
+ } else if (flags & MS_MOVE) {
+ type = tomoyo_mounts[TOMOYO_MOUNT_MOVE];
+ flags &= ~MS_MOVE;
+ }
+ if (!type)
+ type = "<NULL>";
+ idx = tomoyo_read_lock();
+ error = tomoyo_mount_acl(&r, dev_name, path, type, flags);
+ tomoyo_read_unlock(idx);
+ return error;
+}
diff --git a/security/tomoyo/network.c b/security/tomoyo/network.c
new file mode 100644
index 000000000..478f757ff
--- /dev/null
+++ b/security/tomoyo/network.c
@@ -0,0 +1,777 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/network.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+#include <linux/slab.h>
+
+/* Structure for holding inet domain socket's address. */
+struct tomoyo_inet_addr_info {
+ __be16 port; /* In network byte order. */
+ const __be32 *address; /* In network byte order. */
+ bool is_ipv6;
+};
+
+/* Structure for holding unix domain socket's address. */
+struct tomoyo_unix_addr_info {
+ u8 *addr; /* This may not be '\0' terminated string. */
+ unsigned int addr_len;
+};
+
+/* Structure for holding socket address. */
+struct tomoyo_addr_info {
+ u8 protocol;
+ u8 operation;
+ struct tomoyo_inet_addr_info inet;
+ struct tomoyo_unix_addr_info unix0;
+};
+
+/* String table for socket's protocols. */
+const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX] = {
+ [SOCK_STREAM] = "stream",
+ [SOCK_DGRAM] = "dgram",
+ [SOCK_RAW] = "raw",
+ [SOCK_SEQPACKET] = "seqpacket",
+ [0] = " ", /* Dummy for avoiding NULL pointer dereference. */
+ [4] = " ", /* Dummy for avoiding NULL pointer dereference. */
+};
+
+/**
+ * tomoyo_parse_ipaddr_union - Parse an IP address.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @ptr: Pointer to "struct tomoyo_ipaddr_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
+ struct tomoyo_ipaddr_union *ptr)
+{
+ u8 * const min = ptr->ip[0].in6_u.u6_addr8;
+ u8 * const max = ptr->ip[1].in6_u.u6_addr8;
+ char *address = tomoyo_read_token(param);
+ const char *end;
+
+ if (!strchr(address, ':') &&
+ in4_pton(address, -1, min, '-', &end) > 0) {
+ ptr->is_ipv6 = false;
+ if (!*end)
+ ptr->ip[1].s6_addr32[0] = ptr->ip[0].s6_addr32[0];
+ else if (*end++ != '-' ||
+ in4_pton(end, -1, max, '\0', &end) <= 0 || *end)
+ return false;
+ return true;
+ }
+ if (in6_pton(address, -1, min, '-', &end) > 0) {
+ ptr->is_ipv6 = true;
+ if (!*end)
+ memmove(max, min, sizeof(u16) * 8);
+ else if (*end++ != '-' ||
+ in6_pton(end, -1, max, '\0', &end) <= 0 || *end)
+ return false;
+ return true;
+ }
+ return false;
+}
+
+/**
+ * tomoyo_print_ipv4 - Print an IPv4 address.
+ *
+ * @buffer: Buffer to write to.
+ * @buffer_len: Size of @buffer.
+ * @min_ip: Pointer to __be32.
+ * @max_ip: Pointer to __be32.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_ipv4(char *buffer, const unsigned int buffer_len,
+ const __be32 *min_ip, const __be32 *max_ip)
+{
+ snprintf(buffer, buffer_len, "%pI4%c%pI4", min_ip,
+ *min_ip == *max_ip ? '\0' : '-', max_ip);
+}
+
+/**
+ * tomoyo_print_ipv6 - Print an IPv6 address.
+ *
+ * @buffer: Buffer to write to.
+ * @buffer_len: Size of @buffer.
+ * @min_ip: Pointer to "struct in6_addr".
+ * @max_ip: Pointer to "struct in6_addr".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_ipv6(char *buffer, const unsigned int buffer_len,
+ const struct in6_addr *min_ip,
+ const struct in6_addr *max_ip)
+{
+ snprintf(buffer, buffer_len, "%pI6c%c%pI6c", min_ip,
+ !memcmp(min_ip, max_ip, 16) ? '\0' : '-', max_ip);
+}
+
+/**
+ * tomoyo_print_ip - Print an IP address.
+ *
+ * @buf: Buffer to write to.
+ * @size: Size of @buf.
+ * @ptr: Pointer to "struct ipaddr_union".
+ *
+ * Returns nothing.
+ */
+void tomoyo_print_ip(char *buf, const unsigned int size,
+ const struct tomoyo_ipaddr_union *ptr)
+{
+ if (ptr->is_ipv6)
+ tomoyo_print_ipv6(buf, size, &ptr->ip[0], &ptr->ip[1]);
+ else
+ tomoyo_print_ipv4(buf, size, &ptr->ip[0].s6_addr32[0],
+ &ptr->ip[1].s6_addr32[0]);
+}
+
+/*
+ * Mapping table from "enum tomoyo_network_acl_index" to
+ * "enum tomoyo_mac_index" for inet domain socket.
+ */
+static const u8 tomoyo_inet2mac
+[TOMOYO_SOCK_MAX][TOMOYO_MAX_NETWORK_OPERATION] = {
+ [SOCK_STREAM] = {
+ [TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
+ [TOMOYO_NETWORK_LISTEN] =
+ TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
+ [TOMOYO_NETWORK_CONNECT] =
+ TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
+ },
+ [SOCK_DGRAM] = {
+ [TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
+ [TOMOYO_NETWORK_SEND] = TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
+ },
+ [SOCK_RAW] = {
+ [TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_INET_RAW_BIND,
+ [TOMOYO_NETWORK_SEND] = TOMOYO_MAC_NETWORK_INET_RAW_SEND,
+ },
+};
+
+/*
+ * Mapping table from "enum tomoyo_network_acl_index" to
+ * "enum tomoyo_mac_index" for unix domain socket.
+ */
+static const u8 tomoyo_unix2mac
+[TOMOYO_SOCK_MAX][TOMOYO_MAX_NETWORK_OPERATION] = {
+ [SOCK_STREAM] = {
+ [TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
+ [TOMOYO_NETWORK_LISTEN] =
+ TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
+ [TOMOYO_NETWORK_CONNECT] =
+ TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
+ },
+ [SOCK_DGRAM] = {
+ [TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
+ [TOMOYO_NETWORK_SEND] = TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
+ },
+ [SOCK_SEQPACKET] = {
+ [TOMOYO_NETWORK_BIND] =
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
+ [TOMOYO_NETWORK_LISTEN] =
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
+ [TOMOYO_NETWORK_CONNECT] =
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
+ },
+};
+
+/**
+ * tomoyo_same_inet_acl - Check for duplicated "struct tomoyo_inet_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b except permission bits, false otherwise.
+ */
+static bool tomoyo_same_inet_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_inet_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_inet_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return p1->protocol == p2->protocol &&
+ tomoyo_same_ipaddr_union(&p1->address, &p2->address) &&
+ tomoyo_same_number_union(&p1->port, &p2->port);
+}
+
+/**
+ * tomoyo_same_unix_acl - Check for duplicated "struct tomoyo_unix_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b except permission bits, false otherwise.
+ */
+static bool tomoyo_same_unix_acl(const struct tomoyo_acl_info *a,
+ const struct tomoyo_acl_info *b)
+{
+ const struct tomoyo_unix_acl *p1 = container_of(a, typeof(*p1), head);
+ const struct tomoyo_unix_acl *p2 = container_of(b, typeof(*p2), head);
+
+ return p1->protocol == p2->protocol &&
+ tomoyo_same_name_union(&p1->name, &p2->name);
+}
+
+/**
+ * tomoyo_merge_inet_acl - Merge duplicated "struct tomoyo_inet_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ * @is_delete: True for @a &= ~@b, false for @a |= @b.
+ *
+ * Returns true if @a is empty, false otherwise.
+ */
+static bool tomoyo_merge_inet_acl(struct tomoyo_acl_info *a,
+ struct tomoyo_acl_info *b,
+ const bool is_delete)
+{
+ u8 * const a_perm =
+ &container_of(a, struct tomoyo_inet_acl, head)->perm;
+ u8 perm = READ_ONCE(*a_perm);
+ const u8 b_perm = container_of(b, struct tomoyo_inet_acl, head)->perm;
+
+ if (is_delete)
+ perm &= ~b_perm;
+ else
+ perm |= b_perm;
+ WRITE_ONCE(*a_perm, perm);
+ return !perm;
+}
+
+/**
+ * tomoyo_merge_unix_acl - Merge duplicated "struct tomoyo_unix_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ * @is_delete: True for @a &= ~@b, false for @a |= @b.
+ *
+ * Returns true if @a is empty, false otherwise.
+ */
+static bool tomoyo_merge_unix_acl(struct tomoyo_acl_info *a,
+ struct tomoyo_acl_info *b,
+ const bool is_delete)
+{
+ u8 * const a_perm =
+ &container_of(a, struct tomoyo_unix_acl, head)->perm;
+ u8 perm = READ_ONCE(*a_perm);
+ const u8 b_perm = container_of(b, struct tomoyo_unix_acl, head)->perm;
+
+ if (is_delete)
+ perm &= ~b_perm;
+ else
+ perm |= b_perm;
+ WRITE_ONCE(*a_perm, perm);
+ return !perm;
+}
+
+/**
+ * tomoyo_write_inet_network - Write "struct tomoyo_inet_acl" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_write_inet_network(struct tomoyo_acl_param *param)
+{
+ struct tomoyo_inet_acl e = { .head.type = TOMOYO_TYPE_INET_ACL };
+ int error = -EINVAL;
+ u8 type;
+ const char *protocol = tomoyo_read_token(param);
+ const char *operation = tomoyo_read_token(param);
+
+ for (e.protocol = 0; e.protocol < TOMOYO_SOCK_MAX; e.protocol++)
+ if (!strcmp(protocol, tomoyo_proto_keyword[e.protocol]))
+ break;
+ for (type = 0; type < TOMOYO_MAX_NETWORK_OPERATION; type++)
+ if (tomoyo_permstr(operation, tomoyo_socket_keyword[type]))
+ e.perm |= 1 << type;
+ if (e.protocol == TOMOYO_SOCK_MAX || !e.perm)
+ return -EINVAL;
+ if (param->data[0] == '@') {
+ param->data++;
+ e.address.group =
+ tomoyo_get_group(param, TOMOYO_ADDRESS_GROUP);
+ if (!e.address.group)
+ return -ENOMEM;
+ } else {
+ if (!tomoyo_parse_ipaddr_union(param, &e.address))
+ goto out;
+ }
+ if (!tomoyo_parse_number_union(param, &e.port) ||
+ e.port.values[1] > 65535)
+ goto out;
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_inet_acl,
+ tomoyo_merge_inet_acl);
+out:
+ tomoyo_put_group(e.address.group);
+ tomoyo_put_number_union(&e.port);
+ return error;
+}
+
+/**
+ * tomoyo_write_unix_network - Write "struct tomoyo_unix_acl" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_unix_network(struct tomoyo_acl_param *param)
+{
+ struct tomoyo_unix_acl e = { .head.type = TOMOYO_TYPE_UNIX_ACL };
+ int error;
+ u8 type;
+ const char *protocol = tomoyo_read_token(param);
+ const char *operation = tomoyo_read_token(param);
+
+ for (e.protocol = 0; e.protocol < TOMOYO_SOCK_MAX; e.protocol++)
+ if (!strcmp(protocol, tomoyo_proto_keyword[e.protocol]))
+ break;
+ for (type = 0; type < TOMOYO_MAX_NETWORK_OPERATION; type++)
+ if (tomoyo_permstr(operation, tomoyo_socket_keyword[type]))
+ e.perm |= 1 << type;
+ if (e.protocol == TOMOYO_SOCK_MAX || !e.perm)
+ return -EINVAL;
+ if (!tomoyo_parse_name_union(param, &e.name))
+ return -EINVAL;
+ error = tomoyo_update_domain(&e.head, sizeof(e), param,
+ tomoyo_same_unix_acl,
+ tomoyo_merge_unix_acl);
+ tomoyo_put_name_union(&e.name);
+ return error;
+}
+
+/**
+ * tomoyo_audit_net_log - Audit network log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @family: Name of socket family ("inet" or "unix").
+ * @protocol: Name of protocol in @family.
+ * @operation: Name of socket operation.
+ * @address: Name of address.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_net_log(struct tomoyo_request_info *r,
+ const char *family, const u8 protocol,
+ const u8 operation, const char *address)
+{
+ return tomoyo_supervisor(r, "network %s %s %s %s\n", family,
+ tomoyo_proto_keyword[protocol],
+ tomoyo_socket_keyword[operation], address);
+}
+
+/**
+ * tomoyo_audit_inet_log - Audit INET network log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_inet_log(struct tomoyo_request_info *r)
+{
+ char buf[128];
+ int len;
+ const __be32 *address = r->param.inet_network.address;
+
+ if (r->param.inet_network.is_ipv6)
+ tomoyo_print_ipv6(buf, sizeof(buf), (const struct in6_addr *)
+ address, (const struct in6_addr *) address);
+ else
+ tomoyo_print_ipv4(buf, sizeof(buf), address, address);
+ len = strlen(buf);
+ snprintf(buf + len, sizeof(buf) - len, " %u",
+ r->param.inet_network.port);
+ return tomoyo_audit_net_log(r, "inet", r->param.inet_network.protocol,
+ r->param.inet_network.operation, buf);
+}
+
+/**
+ * tomoyo_audit_unix_log - Audit UNIX network log.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_audit_unix_log(struct tomoyo_request_info *r)
+{
+ return tomoyo_audit_net_log(r, "unix", r->param.unix_network.protocol,
+ r->param.unix_network.operation,
+ r->param.unix_network.address->name);
+}
+
+/**
+ * tomoyo_check_inet_acl - Check permission for inet domain socket operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_inet_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_inet_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+ const u8 size = r->param.inet_network.is_ipv6 ? 16 : 4;
+
+ if (!(acl->perm & (1 << r->param.inet_network.operation)) ||
+ !tomoyo_compare_number_union(r->param.inet_network.port,
+ &acl->port))
+ return false;
+ if (acl->address.group)
+ return tomoyo_address_matches_group
+ (r->param.inet_network.is_ipv6,
+ r->param.inet_network.address, acl->address.group);
+ return acl->address.is_ipv6 == r->param.inet_network.is_ipv6 &&
+ memcmp(&acl->address.ip[0],
+ r->param.inet_network.address, size) <= 0 &&
+ memcmp(r->param.inet_network.address,
+ &acl->address.ip[1], size) <= 0;
+}
+
+/**
+ * tomoyo_check_unix_acl - Check permission for unix domain socket operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_unix_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_unix_acl *acl =
+ container_of(ptr, typeof(*acl), head);
+
+ return (acl->perm & (1 << r->param.unix_network.operation)) &&
+ tomoyo_compare_name_union(r->param.unix_network.address,
+ &acl->name);
+}
+
+/**
+ * tomoyo_inet_entry - Check permission for INET network operation.
+ *
+ * @address: Pointer to "struct tomoyo_addr_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_inet_entry(const struct tomoyo_addr_info *address)
+{
+ const int idx = tomoyo_read_lock();
+ struct tomoyo_request_info r;
+ int error = 0;
+ const u8 type = tomoyo_inet2mac[address->protocol][address->operation];
+
+ if (type && tomoyo_init_request_info(&r, NULL, type)
+ != TOMOYO_CONFIG_DISABLED) {
+ r.param_type = TOMOYO_TYPE_INET_ACL;
+ r.param.inet_network.protocol = address->protocol;
+ r.param.inet_network.operation = address->operation;
+ r.param.inet_network.is_ipv6 = address->inet.is_ipv6;
+ r.param.inet_network.address = address->inet.address;
+ r.param.inet_network.port = ntohs(address->inet.port);
+ do {
+ tomoyo_check_acl(&r, tomoyo_check_inet_acl);
+ error = tomoyo_audit_inet_log(&r);
+ } while (error == TOMOYO_RETRY_REQUEST);
+ }
+ tomoyo_read_unlock(idx);
+ return error;
+}
+
+/**
+ * tomoyo_check_inet_address - Check permission for inet domain socket's operation.
+ *
+ * @addr: Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ * @port: Port number.
+ * @address: Pointer to "struct tomoyo_addr_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_check_inet_address(const struct sockaddr *addr,
+ const unsigned int addr_len,
+ const u16 port,
+ struct tomoyo_addr_info *address)
+{
+ struct tomoyo_inet_addr_info *i = &address->inet;
+
+ if (addr_len < offsetofend(struct sockaddr, sa_family))
+ return 0;
+ switch (addr->sa_family) {
+ case AF_INET6:
+ if (addr_len < SIN6_LEN_RFC2133)
+ goto skip;
+ i->is_ipv6 = true;
+ i->address = (__be32 *)
+ ((struct sockaddr_in6 *) addr)->sin6_addr.s6_addr;
+ i->port = ((struct sockaddr_in6 *) addr)->sin6_port;
+ break;
+ case AF_INET:
+ if (addr_len < sizeof(struct sockaddr_in))
+ goto skip;
+ i->is_ipv6 = false;
+ i->address = (__be32 *)
+ &((struct sockaddr_in *) addr)->sin_addr;
+ i->port = ((struct sockaddr_in *) addr)->sin_port;
+ break;
+ default:
+ goto skip;
+ }
+ if (address->protocol == SOCK_RAW)
+ i->port = htons(port);
+ return tomoyo_inet_entry(address);
+skip:
+ return 0;
+}
+
+/**
+ * tomoyo_unix_entry - Check permission for UNIX network operation.
+ *
+ * @address: Pointer to "struct tomoyo_addr_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_unix_entry(const struct tomoyo_addr_info *address)
+{
+ const int idx = tomoyo_read_lock();
+ struct tomoyo_request_info r;
+ int error = 0;
+ const u8 type = tomoyo_unix2mac[address->protocol][address->operation];
+
+ if (type && tomoyo_init_request_info(&r, NULL, type)
+ != TOMOYO_CONFIG_DISABLED) {
+ char *buf = address->unix0.addr;
+ int len = address->unix0.addr_len - sizeof(sa_family_t);
+
+ if (len <= 0) {
+ buf = "anonymous";
+ len = 9;
+ } else if (buf[0]) {
+ len = strnlen(buf, len);
+ }
+ buf = tomoyo_encode2(buf, len);
+ if (buf) {
+ struct tomoyo_path_info addr;
+
+ addr.name = buf;
+ tomoyo_fill_path_info(&addr);
+ r.param_type = TOMOYO_TYPE_UNIX_ACL;
+ r.param.unix_network.protocol = address->protocol;
+ r.param.unix_network.operation = address->operation;
+ r.param.unix_network.address = &addr;
+ do {
+ tomoyo_check_acl(&r, tomoyo_check_unix_acl);
+ error = tomoyo_audit_unix_log(&r);
+ } while (error == TOMOYO_RETRY_REQUEST);
+ kfree(buf);
+ } else
+ error = -ENOMEM;
+ }
+ tomoyo_read_unlock(idx);
+ return error;
+}
+
+/**
+ * tomoyo_check_unix_address - Check permission for unix domain socket's operation.
+ *
+ * @addr: Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ * @address: Pointer to "struct tomoyo_addr_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_check_unix_address(struct sockaddr *addr,
+ const unsigned int addr_len,
+ struct tomoyo_addr_info *address)
+{
+ struct tomoyo_unix_addr_info *u = &address->unix0;
+
+ if (addr_len < offsetofend(struct sockaddr, sa_family))
+ return 0;
+ if (addr->sa_family != AF_UNIX)
+ return 0;
+ u->addr = ((struct sockaddr_un *) addr)->sun_path;
+ u->addr_len = addr_len;
+ return tomoyo_unix_entry(address);
+}
+
+/**
+ * tomoyo_kernel_service - Check whether I'm kernel service or not.
+ *
+ * Returns true if I'm kernel service, false otherwise.
+ */
+static bool tomoyo_kernel_service(void)
+{
+ /* Nothing to do if I am a kernel service. */
+ return (current->flags & (PF_KTHREAD | PF_IO_WORKER)) == PF_KTHREAD;
+}
+
+/**
+ * tomoyo_sock_family - Get socket's family.
+ *
+ * @sk: Pointer to "struct sock".
+ *
+ * Returns one of PF_INET, PF_INET6, PF_UNIX or 0.
+ */
+static u8 tomoyo_sock_family(struct sock *sk)
+{
+ u8 family;
+
+ if (tomoyo_kernel_service())
+ return 0;
+ family = sk->sk_family;
+ switch (family) {
+ case PF_INET:
+ case PF_INET6:
+ case PF_UNIX:
+ return family;
+ default:
+ return 0;
+ }
+}
+
+/**
+ * tomoyo_socket_listen_permission - Check permission for listening a socket.
+ *
+ * @sock: Pointer to "struct socket".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_socket_listen_permission(struct socket *sock)
+{
+ struct tomoyo_addr_info address;
+ const u8 family = tomoyo_sock_family(sock->sk);
+ const unsigned int type = sock->type;
+ struct sockaddr_storage addr;
+ int addr_len;
+
+ if (!family || (type != SOCK_STREAM && type != SOCK_SEQPACKET))
+ return 0;
+ {
+ const int error = sock->ops->getname(sock, (struct sockaddr *)
+ &addr, 0);
+
+ if (error < 0)
+ return error;
+ addr_len = error;
+ }
+ address.protocol = type;
+ address.operation = TOMOYO_NETWORK_LISTEN;
+ if (family == PF_UNIX)
+ return tomoyo_check_unix_address((struct sockaddr *) &addr,
+ addr_len, &address);
+ return tomoyo_check_inet_address((struct sockaddr *) &addr, addr_len,
+ 0, &address);
+}
+
+/**
+ * tomoyo_socket_connect_permission - Check permission for setting the remote address of a socket.
+ *
+ * @sock: Pointer to "struct socket".
+ * @addr: Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_socket_connect_permission(struct socket *sock,
+ struct sockaddr *addr, int addr_len)
+{
+ struct tomoyo_addr_info address;
+ const u8 family = tomoyo_sock_family(sock->sk);
+ const unsigned int type = sock->type;
+
+ if (!family)
+ return 0;
+ address.protocol = type;
+ switch (type) {
+ case SOCK_DGRAM:
+ case SOCK_RAW:
+ address.operation = TOMOYO_NETWORK_SEND;
+ break;
+ case SOCK_STREAM:
+ case SOCK_SEQPACKET:
+ address.operation = TOMOYO_NETWORK_CONNECT;
+ break;
+ default:
+ return 0;
+ }
+ if (family == PF_UNIX)
+ return tomoyo_check_unix_address(addr, addr_len, &address);
+ return tomoyo_check_inet_address(addr, addr_len, sock->sk->sk_protocol,
+ &address);
+}
+
+/**
+ * tomoyo_socket_bind_permission - Check permission for setting the local address of a socket.
+ *
+ * @sock: Pointer to "struct socket".
+ * @addr: Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
+ int addr_len)
+{
+ struct tomoyo_addr_info address;
+ const u8 family = tomoyo_sock_family(sock->sk);
+ const unsigned int type = sock->type;
+
+ if (!family)
+ return 0;
+ switch (type) {
+ case SOCK_STREAM:
+ case SOCK_DGRAM:
+ case SOCK_RAW:
+ case SOCK_SEQPACKET:
+ address.protocol = type;
+ address.operation = TOMOYO_NETWORK_BIND;
+ break;
+ default:
+ return 0;
+ }
+ if (family == PF_UNIX)
+ return tomoyo_check_unix_address(addr, addr_len, &address);
+ return tomoyo_check_inet_address(addr, addr_len, sock->sk->sk_protocol,
+ &address);
+}
+
+/**
+ * tomoyo_socket_sendmsg_permission - Check permission for sending a datagram.
+ *
+ * @sock: Pointer to "struct socket".
+ * @msg: Pointer to "struct msghdr".
+ * @size: Unused.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
+ int size)
+{
+ struct tomoyo_addr_info address;
+ const u8 family = tomoyo_sock_family(sock->sk);
+ const unsigned int type = sock->type;
+
+ if (!msg->msg_name || !family ||
+ (type != SOCK_DGRAM && type != SOCK_RAW))
+ return 0;
+ address.protocol = type;
+ address.operation = TOMOYO_NETWORK_SEND;
+ if (family == PF_UNIX)
+ return tomoyo_check_unix_address((struct sockaddr *)
+ msg->msg_name,
+ msg->msg_namelen, &address);
+ return tomoyo_check_inet_address((struct sockaddr *) msg->msg_name,
+ msg->msg_namelen,
+ sock->sk->sk_protocol, &address);
+}
diff --git a/security/tomoyo/policy/exception_policy.conf.default b/security/tomoyo/policy/exception_policy.conf.default
new file mode 100644
index 000000000..2678df496
--- /dev/null
+++ b/security/tomoyo/policy/exception_policy.conf.default
@@ -0,0 +1,2 @@
+initialize_domain /sbin/modprobe from any
+initialize_domain /sbin/hotplug from any
diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
new file mode 100644
index 000000000..df4798980
--- /dev/null
+++ b/security/tomoyo/realpath.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/realpath.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include "common.h"
+#include <linux/magic.h>
+#include <linux/proc_fs.h>
+
+/**
+ * tomoyo_encode2 - Encode binary string to ascii string.
+ *
+ * @str: String in binary format.
+ * @str_len: Size of @str in byte.
+ *
+ * Returns pointer to @str in ascii format on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+char *tomoyo_encode2(const char *str, int str_len)
+{
+ int i;
+ int len = 0;
+ const char *p = str;
+ char *cp;
+ char *cp0;
+
+ if (!p)
+ return NULL;
+ for (i = 0; i < str_len; i++) {
+ const unsigned char c = p[i];
+
+ if (c == '\\')
+ len += 2;
+ else if (c > ' ' && c < 127)
+ len++;
+ else
+ len += 4;
+ }
+ len++;
+ /* Reserve space for appending "/". */
+ cp = kzalloc(len + 10, GFP_NOFS);
+ if (!cp)
+ return NULL;
+ cp0 = cp;
+ p = str;
+ for (i = 0; i < str_len; i++) {
+ const unsigned char c = p[i];
+
+ if (c == '\\') {
+ *cp++ = '\\';
+ *cp++ = '\\';
+ } else if (c > ' ' && c < 127) {
+ *cp++ = c;
+ } else {
+ *cp++ = '\\';
+ *cp++ = (c >> 6) + '0';
+ *cp++ = ((c >> 3) & 7) + '0';
+ *cp++ = (c & 7) + '0';
+ }
+ }
+ return cp0;
+}
+
+/**
+ * tomoyo_encode - Encode binary string to ascii string.
+ *
+ * @str: String in binary format.
+ *
+ * Returns pointer to @str in ascii format on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+char *tomoyo_encode(const char *str)
+{
+ return str ? tomoyo_encode2(str, strlen(str)) : NULL;
+}
+
+/**
+ * tomoyo_get_absolute_path - Get the path of a dentry but ignores chroot'ed root.
+ *
+ * @path: Pointer to "struct path".
+ * @buffer: Pointer to buffer to return value in.
+ * @buflen: Sizeof @buffer.
+ *
+ * Returns the buffer on success, an error code otherwise.
+ *
+ * If dentry is a directory, trailing '/' is appended.
+ */
+static char *tomoyo_get_absolute_path(const struct path *path, char * const buffer,
+ const int buflen)
+{
+ char *pos = ERR_PTR(-ENOMEM);
+
+ if (buflen >= 256) {
+ /* go to whatever namespace root we are under */
+ pos = d_absolute_path(path, buffer, buflen - 1);
+ if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
+ struct inode *inode = d_backing_inode(path->dentry);
+
+ if (inode && S_ISDIR(inode->i_mode)) {
+ buffer[buflen - 2] = '/';
+ buffer[buflen - 1] = '\0';
+ }
+ }
+ }
+ return pos;
+}
+
+/**
+ * tomoyo_get_dentry_path - Get the path of a dentry.
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @buffer: Pointer to buffer to return value in.
+ * @buflen: Sizeof @buffer.
+ *
+ * Returns the buffer on success, an error code otherwise.
+ *
+ * If dentry is a directory, trailing '/' is appended.
+ */
+static char *tomoyo_get_dentry_path(struct dentry *dentry, char * const buffer,
+ const int buflen)
+{
+ char *pos = ERR_PTR(-ENOMEM);
+
+ if (buflen >= 256) {
+ pos = dentry_path_raw(dentry, buffer, buflen - 1);
+ if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
+ struct inode *inode = d_backing_inode(dentry);
+
+ if (inode && S_ISDIR(inode->i_mode)) {
+ buffer[buflen - 2] = '/';
+ buffer[buflen - 1] = '\0';
+ }
+ }
+ }
+ return pos;
+}
+
+/**
+ * tomoyo_get_local_path - Get the path of a dentry.
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @buffer: Pointer to buffer to return value in.
+ * @buflen: Sizeof @buffer.
+ *
+ * Returns the buffer on success, an error code otherwise.
+ */
+static char *tomoyo_get_local_path(struct dentry *dentry, char * const buffer,
+ const int buflen)
+{
+ struct super_block *sb = dentry->d_sb;
+ char *pos = tomoyo_get_dentry_path(dentry, buffer, buflen);
+
+ if (IS_ERR(pos))
+ return pos;
+ /* Convert from $PID to self if $PID is current thread. */
+ if (sb->s_magic == PROC_SUPER_MAGIC && *pos == '/') {
+ char *ep;
+ const pid_t pid = (pid_t) simple_strtoul(pos + 1, &ep, 10);
+ struct pid_namespace *proc_pidns = proc_pid_ns(sb);
+
+ if (*ep == '/' && pid && pid ==
+ task_tgid_nr_ns(current, proc_pidns)) {
+ pos = ep - 5;
+ if (pos < buffer)
+ goto out;
+ memmove(pos, "/self", 5);
+ }
+ goto prepend_filesystem_name;
+ }
+ /* Use filesystem name for unnamed devices. */
+ if (!MAJOR(sb->s_dev))
+ goto prepend_filesystem_name;
+ {
+ struct inode *inode = d_backing_inode(sb->s_root);
+
+ /*
+ * Use filesystem name if filesystem does not support rename()
+ * operation.
+ */
+ if (!inode->i_op->rename)
+ goto prepend_filesystem_name;
+ }
+ /* Prepend device name. */
+ {
+ char name[64];
+ int name_len;
+ const dev_t dev = sb->s_dev;
+
+ name[sizeof(name) - 1] = '\0';
+ snprintf(name, sizeof(name) - 1, "dev(%u,%u):", MAJOR(dev),
+ MINOR(dev));
+ name_len = strlen(name);
+ pos -= name_len;
+ if (pos < buffer)
+ goto out;
+ memmove(pos, name, name_len);
+ return pos;
+ }
+ /* Prepend filesystem name. */
+prepend_filesystem_name:
+ {
+ const char *name = sb->s_type->name;
+ const int name_len = strlen(name);
+
+ pos -= name_len + 1;
+ if (pos < buffer)
+ goto out;
+ memmove(pos, name, name_len);
+ pos[name_len] = ':';
+ }
+ return pos;
+out:
+ return ERR_PTR(-ENOMEM);
+}
+
+/**
+ * tomoyo_realpath_from_path - Returns realpath(3) of the given pathname but ignores chroot'ed root.
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns the realpath of the given @path on success, NULL otherwise.
+ *
+ * If dentry is a directory, trailing '/' is appended.
+ * Characters out of 0x20 < c < 0x7F range are converted to
+ * \ooo style octal string.
+ * Character \ is converted to \\ string.
+ *
+ * These functions use kzalloc(), so the caller must call kfree()
+ * if these functions didn't return NULL.
+ */
+char *tomoyo_realpath_from_path(const struct path *path)
+{
+ char *buf = NULL;
+ char *name = NULL;
+ unsigned int buf_len = PAGE_SIZE / 2;
+ struct dentry *dentry = path->dentry;
+ struct super_block *sb;
+
+ if (!dentry)
+ return NULL;
+ sb = dentry->d_sb;
+ while (1) {
+ char *pos;
+ struct inode *inode;
+
+ buf_len <<= 1;
+ kfree(buf);
+ buf = kmalloc(buf_len, GFP_NOFS);
+ if (!buf)
+ break;
+ /* To make sure that pos is '\0' terminated. */
+ buf[buf_len - 1] = '\0';
+ /* For "pipe:[\$]" and "socket:[\$]". */
+ if (dentry->d_op && dentry->d_op->d_dname) {
+ pos = dentry->d_op->d_dname(dentry, buf, buf_len - 1);
+ goto encode;
+ }
+ inode = d_backing_inode(sb->s_root);
+ /*
+ * Get local name for filesystems without rename() operation
+ * or dentry without vfsmount.
+ */
+ if (!path->mnt ||
+ (!inode->i_op->rename &&
+ !(sb->s_type->fs_flags & FS_REQUIRES_DEV)))
+ pos = tomoyo_get_local_path(path->dentry, buf,
+ buf_len - 1);
+ /* Get absolute name for the rest. */
+ else {
+ pos = tomoyo_get_absolute_path(path, buf, buf_len - 1);
+ /*
+ * Fall back to local name if absolute name is not
+ * available.
+ */
+ if (pos == ERR_PTR(-EINVAL))
+ pos = tomoyo_get_local_path(path->dentry, buf,
+ buf_len - 1);
+ }
+encode:
+ if (IS_ERR(pos))
+ continue;
+ name = tomoyo_encode(pos);
+ break;
+ }
+ kfree(buf);
+ if (!name)
+ tomoyo_warn_oom(__func__);
+ return name;
+}
+
+/**
+ * tomoyo_realpath_nofollow - Get realpath of a pathname.
+ *
+ * @pathname: The pathname to solve.
+ *
+ * Returns the realpath of @pathname on success, NULL otherwise.
+ */
+char *tomoyo_realpath_nofollow(const char *pathname)
+{
+ struct path path;
+
+ if (pathname && kern_path(pathname, 0, &path) == 0) {
+ char *buf = tomoyo_realpath_from_path(&path);
+
+ path_put(&path);
+ return buf;
+ }
+ return NULL;
+}
diff --git a/security/tomoyo/securityfs_if.c b/security/tomoyo/securityfs_if.c
new file mode 100644
index 000000000..546281c5b
--- /dev/null
+++ b/security/tomoyo/securityfs_if.c
@@ -0,0 +1,272 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/securityfs_if.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/security.h>
+#include "common.h"
+
+/**
+ * tomoyo_check_task_acl - Check permission for task operation.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ * @ptr: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool tomoyo_check_task_acl(struct tomoyo_request_info *r,
+ const struct tomoyo_acl_info *ptr)
+{
+ const struct tomoyo_task_acl *acl = container_of(ptr, typeof(*acl),
+ head);
+
+ return !tomoyo_pathcmp(r->param.task.domainname, acl->domainname);
+}
+
+/**
+ * tomoyo_write_self - write() for /sys/kernel/security/tomoyo/self_domain interface.
+ *
+ * @file: Pointer to "struct file".
+ * @buf: Domainname to transit to.
+ * @count: Size of @buf.
+ * @ppos: Unused.
+ *
+ * Returns @count on success, negative value otherwise.
+ *
+ * If domain transition was permitted but the domain transition failed, this
+ * function returns error rather than terminating current thread with SIGKILL.
+ */
+static ssize_t tomoyo_write_self(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char *data;
+ int error;
+
+ if (!count || count >= TOMOYO_EXEC_TMPSIZE - 10)
+ return -ENOMEM;
+ data = memdup_user_nul(buf, count);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+ tomoyo_normalize_line(data);
+ if (tomoyo_correct_domain(data)) {
+ const int idx = tomoyo_read_lock();
+ struct tomoyo_path_info name;
+ struct tomoyo_request_info r;
+
+ name.name = data;
+ tomoyo_fill_path_info(&name);
+ /* Check "task manual_domain_transition" permission. */
+ tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_EXECUTE);
+ r.param_type = TOMOYO_TYPE_MANUAL_TASK_ACL;
+ r.param.task.domainname = &name;
+ tomoyo_check_acl(&r, tomoyo_check_task_acl);
+ if (!r.granted)
+ error = -EPERM;
+ else {
+ struct tomoyo_domain_info *new_domain =
+ tomoyo_assign_domain(data, true);
+ if (!new_domain) {
+ error = -ENOENT;
+ } else {
+ struct tomoyo_task *s = tomoyo_task(current);
+ struct tomoyo_domain_info *old_domain =
+ s->domain_info;
+
+ s->domain_info = new_domain;
+ atomic_inc(&new_domain->users);
+ atomic_dec(&old_domain->users);
+ error = 0;
+ }
+ }
+ tomoyo_read_unlock(idx);
+ } else
+ error = -EINVAL;
+ kfree(data);
+ return error ? error : count;
+}
+
+/**
+ * tomoyo_read_self - read() for /sys/kernel/security/tomoyo/self_domain interface.
+ *
+ * @file: Pointer to "struct file".
+ * @buf: Domainname which current thread belongs to.
+ * @count: Size of @buf.
+ * @ppos: Bytes read by now.
+ *
+ * Returns read size on success, negative value otherwise.
+ */
+static ssize_t tomoyo_read_self(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ const char *domain = tomoyo_domain()->domainname->name;
+ loff_t len = strlen(domain);
+ loff_t pos = *ppos;
+
+ if (pos >= len || !count)
+ return 0;
+ len -= pos;
+ if (count < len)
+ len = count;
+ if (copy_to_user(buf, domain + pos, len))
+ return -EFAULT;
+ *ppos += len;
+ return len;
+}
+
+/* Operations for /sys/kernel/security/tomoyo/self_domain interface. */
+static const struct file_operations tomoyo_self_operations = {
+ .write = tomoyo_write_self,
+ .read = tomoyo_read_self,
+};
+
+/**
+ * tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @inode: Pointer to "struct inode".
+ * @file: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_open(struct inode *inode, struct file *file)
+{
+ const int key = ((u8 *) file_inode(file)->i_private)
+ - ((u8 *) NULL);
+ return tomoyo_open_control(key, file);
+}
+
+/**
+ * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ *
+ */
+static int tomoyo_release(struct inode *inode, struct file *file)
+{
+ tomoyo_close_control(file->private_data);
+ return 0;
+}
+
+/**
+ * tomoyo_poll - poll() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @wait: Pointer to "poll_table". Maybe NULL.
+ *
+ * Returns EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM if ready to read/write,
+ * EPOLLOUT | EPOLLWRNORM otherwise.
+ */
+static __poll_t tomoyo_poll(struct file *file, poll_table *wait)
+{
+ return tomoyo_poll_control(file, wait);
+}
+
+/**
+ * tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @buf: Pointer to buffer.
+ * @count: Size of @buf.
+ * @ppos: Unused.
+ *
+ * Returns bytes read on success, negative value otherwise.
+ */
+static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ return tomoyo_read_control(file->private_data, buf, count);
+}
+
+/**
+ * tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @buf: Pointer to buffer.
+ * @count: Size of @buf.
+ * @ppos: Unused.
+ *
+ * Returns @count on success, negative value otherwise.
+ */
+static ssize_t tomoyo_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return tomoyo_write_control(file->private_data, buf, count);
+}
+
+/*
+ * tomoyo_operations is a "struct file_operations" which is used for handling
+ * /sys/kernel/security/tomoyo/ interface.
+ *
+ * Some files under /sys/kernel/security/tomoyo/ directory accept open(O_RDWR).
+ * See tomoyo_io_buffer for internals.
+ */
+static const struct file_operations tomoyo_operations = {
+ .open = tomoyo_open,
+ .release = tomoyo_release,
+ .poll = tomoyo_poll,
+ .read = tomoyo_read,
+ .write = tomoyo_write,
+ .llseek = noop_llseek,
+};
+
+/**
+ * tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory.
+ *
+ * @name: The name of the interface file.
+ * @mode: The permission of the interface file.
+ * @parent: The parent directory.
+ * @key: Type of interface.
+ *
+ * Returns nothing.
+ */
+static void __init tomoyo_create_entry(const char *name, const umode_t mode,
+ struct dentry *parent, const u8 key)
+{
+ securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key,
+ &tomoyo_operations);
+}
+
+/**
+ * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface.
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_initerface_init(void)
+{
+ struct tomoyo_domain_info *domain;
+ struct dentry *tomoyo_dir;
+
+ if (!tomoyo_enabled)
+ return 0;
+ domain = tomoyo_domain();
+ /* Don't create securityfs entries unless registered. */
+ if (domain != &tomoyo_kernel_domain)
+ return 0;
+
+ tomoyo_dir = securityfs_create_dir("tomoyo", NULL);
+ tomoyo_create_entry("query", 0600, tomoyo_dir,
+ TOMOYO_QUERY);
+ tomoyo_create_entry("domain_policy", 0600, tomoyo_dir,
+ TOMOYO_DOMAINPOLICY);
+ tomoyo_create_entry("exception_policy", 0600, tomoyo_dir,
+ TOMOYO_EXCEPTIONPOLICY);
+ tomoyo_create_entry("audit", 0400, tomoyo_dir,
+ TOMOYO_AUDIT);
+ tomoyo_create_entry(".process_status", 0600, tomoyo_dir,
+ TOMOYO_PROCESS_STATUS);
+ tomoyo_create_entry("stat", 0644, tomoyo_dir,
+ TOMOYO_STAT);
+ tomoyo_create_entry("profile", 0600, tomoyo_dir,
+ TOMOYO_PROFILE);
+ tomoyo_create_entry("manager", 0600, tomoyo_dir,
+ TOMOYO_MANAGER);
+ tomoyo_create_entry("version", 0400, tomoyo_dir,
+ TOMOYO_VERSION);
+ securityfs_create_file("self_domain", 0666, tomoyo_dir, NULL,
+ &tomoyo_self_operations);
+ tomoyo_load_builtin_policy();
+ return 0;
+}
+
+fs_initcall(tomoyo_initerface_init);
diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
new file mode 100644
index 000000000..1f3cd432d
--- /dev/null
+++ b/security/tomoyo/tomoyo.c
@@ -0,0 +1,594 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/tomoyo.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/lsm_hooks.h>
+#include "common.h"
+
+/**
+ * tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
+ *
+ * Returns pointer to "struct tomoyo_domain_info" for current thread.
+ */
+struct tomoyo_domain_info *tomoyo_domain(void)
+{
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ if (s->old_domain_info && !current->in_execve) {
+ atomic_dec(&s->old_domain_info->users);
+ s->old_domain_info = NULL;
+ }
+ return s->domain_info;
+}
+
+/**
+ * tomoyo_cred_prepare - Target for security_prepare_creds().
+ *
+ * @new: Pointer to "struct cred".
+ * @old: Pointer to "struct cred".
+ * @gfp: Memory allocation flags.
+ *
+ * Returns 0.
+ */
+static int tomoyo_cred_prepare(struct cred *new, const struct cred *old,
+ gfp_t gfp)
+{
+ /* Restore old_domain_info saved by previous execve() request. */
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ if (s->old_domain_info && !current->in_execve) {
+ atomic_dec(&s->domain_info->users);
+ s->domain_info = s->old_domain_info;
+ s->old_domain_info = NULL;
+ }
+ return 0;
+}
+
+/**
+ * tomoyo_bprm_committed_creds - Target for security_bprm_committed_creds().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ */
+static void tomoyo_bprm_committed_creds(struct linux_binprm *bprm)
+{
+ /* Clear old_domain_info saved by execve() request. */
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ atomic_dec(&s->old_domain_info->users);
+ s->old_domain_info = NULL;
+}
+
+#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+/**
+ * tomoyo_bprm_for_exec - Target for security_bprm_creds_for_exec().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns 0.
+ */
+static int tomoyo_bprm_creds_for_exec(struct linux_binprm *bprm)
+{
+ /*
+ * Load policy if /sbin/tomoyo-init exists and /sbin/init is requested
+ * for the first time.
+ */
+ if (!tomoyo_policy_loaded)
+ tomoyo_load_policy(bprm->filename);
+ return 0;
+}
+#endif
+
+/**
+ * tomoyo_bprm_check_security - Target for security_bprm_check().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
+{
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ /*
+ * Execute permission is checked against pathname passed to execve()
+ * using current domain.
+ */
+ if (!s->old_domain_info) {
+ const int idx = tomoyo_read_lock();
+ const int err = tomoyo_find_next_domain(bprm);
+
+ tomoyo_read_unlock(idx);
+ return err;
+ }
+ /*
+ * Read permission is checked against interpreters using next domain.
+ */
+ return tomoyo_check_open_permission(s->domain_info,
+ &bprm->file->f_path, O_RDONLY);
+}
+
+/**
+ * tomoyo_inode_getattr - Target for security_inode_getattr().
+ *
+ * @mnt: Pointer to "struct vfsmount".
+ * @dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_inode_getattr(const struct path *path)
+{
+ return tomoyo_path_perm(TOMOYO_TYPE_GETATTR, path, NULL);
+}
+
+/**
+ * tomoyo_path_truncate - Target for security_path_truncate().
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_truncate(const struct path *path)
+{
+ return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path, NULL);
+}
+
+/**
+ * tomoyo_path_unlink - Target for security_path_unlink().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_unlink(const struct path *parent, struct dentry *dentry)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+
+ return tomoyo_path_perm(TOMOYO_TYPE_UNLINK, &path, NULL);
+}
+
+/**
+ * tomoyo_path_mkdir - Target for security_path_mkdir().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ * @mode: DAC permission mode.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_mkdir(const struct path *parent, struct dentry *dentry,
+ umode_t mode)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+
+ return tomoyo_path_number_perm(TOMOYO_TYPE_MKDIR, &path,
+ mode & S_IALLUGO);
+}
+
+/**
+ * tomoyo_path_rmdir - Target for security_path_rmdir().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_rmdir(const struct path *parent, struct dentry *dentry)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+
+ return tomoyo_path_perm(TOMOYO_TYPE_RMDIR, &path, NULL);
+}
+
+/**
+ * tomoyo_path_symlink - Target for security_path_symlink().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ * @old_name: Symlink's content.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_symlink(const struct path *parent, struct dentry *dentry,
+ const char *old_name)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+
+ return tomoyo_path_perm(TOMOYO_TYPE_SYMLINK, &path, old_name);
+}
+
+/**
+ * tomoyo_path_mknod - Target for security_path_mknod().
+ *
+ * @parent: Pointer to "struct path".
+ * @dentry: Pointer to "struct dentry".
+ * @mode: DAC permission mode.
+ * @dev: Device attributes.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_mknod(const struct path *parent, struct dentry *dentry,
+ umode_t mode, unsigned int dev)
+{
+ struct path path = { .mnt = parent->mnt, .dentry = dentry };
+ int type = TOMOYO_TYPE_CREATE;
+ const unsigned int perm = mode & S_IALLUGO;
+
+ switch (mode & S_IFMT) {
+ case S_IFCHR:
+ type = TOMOYO_TYPE_MKCHAR;
+ break;
+ case S_IFBLK:
+ type = TOMOYO_TYPE_MKBLOCK;
+ break;
+ default:
+ goto no_dev;
+ }
+ return tomoyo_mkdev_perm(type, &path, perm, dev);
+ no_dev:
+ switch (mode & S_IFMT) {
+ case S_IFIFO:
+ type = TOMOYO_TYPE_MKFIFO;
+ break;
+ case S_IFSOCK:
+ type = TOMOYO_TYPE_MKSOCK;
+ break;
+ }
+ return tomoyo_path_number_perm(type, &path, perm);
+}
+
+/**
+ * tomoyo_path_link - Target for security_path_link().
+ *
+ * @old_dentry: Pointer to "struct dentry".
+ * @new_dir: Pointer to "struct path".
+ * @new_dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_link(struct dentry *old_dentry, const struct path *new_dir,
+ struct dentry *new_dentry)
+{
+ struct path path1 = { .mnt = new_dir->mnt, .dentry = old_dentry };
+ struct path path2 = { .mnt = new_dir->mnt, .dentry = new_dentry };
+
+ return tomoyo_path2_perm(TOMOYO_TYPE_LINK, &path1, &path2);
+}
+
+/**
+ * tomoyo_path_rename - Target for security_path_rename().
+ *
+ * @old_parent: Pointer to "struct path".
+ * @old_dentry: Pointer to "struct dentry".
+ * @new_parent: Pointer to "struct path".
+ * @new_dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_rename(const struct path *old_parent,
+ struct dentry *old_dentry,
+ const struct path *new_parent,
+ struct dentry *new_dentry)
+{
+ struct path path1 = { .mnt = old_parent->mnt, .dentry = old_dentry };
+ struct path path2 = { .mnt = new_parent->mnt, .dentry = new_dentry };
+
+ return tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path1, &path2);
+}
+
+/**
+ * tomoyo_file_fcntl - Target for security_file_fcntl().
+ *
+ * @file: Pointer to "struct file".
+ * @cmd: Command for fcntl().
+ * @arg: Argument for @cmd.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_file_fcntl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ if (!(cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND)))
+ return 0;
+ return tomoyo_check_open_permission(tomoyo_domain(), &file->f_path,
+ O_WRONLY | (arg & O_APPEND));
+}
+
+/**
+ * tomoyo_file_open - Target for security_file_open().
+ *
+ * @f: Pointer to "struct file".
+ * @cred: Pointer to "struct cred".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_file_open(struct file *f)
+{
+ /* Don't check read permission here if called from execve(). */
+ if (current->in_execve)
+ return 0;
+ return tomoyo_check_open_permission(tomoyo_domain(), &f->f_path,
+ f->f_flags);
+}
+
+/**
+ * tomoyo_file_ioctl - Target for security_file_ioctl().
+ *
+ * @file: Pointer to "struct file".
+ * @cmd: Command for ioctl().
+ * @arg: Argument for @cmd.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_file_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ return tomoyo_path_number_perm(TOMOYO_TYPE_IOCTL, &file->f_path, cmd);
+}
+
+/**
+ * tomoyo_path_chmod - Target for security_path_chmod().
+ *
+ * @path: Pointer to "struct path".
+ * @mode: DAC permission mode.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_chmod(const struct path *path, umode_t mode)
+{
+ return tomoyo_path_number_perm(TOMOYO_TYPE_CHMOD, path,
+ mode & S_IALLUGO);
+}
+
+/**
+ * tomoyo_path_chown - Target for security_path_chown().
+ *
+ * @path: Pointer to "struct path".
+ * @uid: Owner ID.
+ * @gid: Group ID.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
+{
+ int error = 0;
+
+ if (uid_valid(uid))
+ error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path,
+ from_kuid(&init_user_ns, uid));
+ if (!error && gid_valid(gid))
+ error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path,
+ from_kgid(&init_user_ns, gid));
+ return error;
+}
+
+/**
+ * tomoyo_path_chroot - Target for security_path_chroot().
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_path_chroot(const struct path *path)
+{
+ return tomoyo_path_perm(TOMOYO_TYPE_CHROOT, path, NULL);
+}
+
+/**
+ * tomoyo_sb_mount - Target for security_sb_mount().
+ *
+ * @dev_name: Name of device file. Maybe NULL.
+ * @path: Pointer to "struct path".
+ * @type: Name of filesystem type. Maybe NULL.
+ * @flags: Mount options.
+ * @data: Optional data. Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_sb_mount(const char *dev_name, const struct path *path,
+ const char *type, unsigned long flags, void *data)
+{
+ return tomoyo_mount_permission(dev_name, path, type, flags, data);
+}
+
+/**
+ * tomoyo_sb_umount - Target for security_sb_umount().
+ *
+ * @mnt: Pointer to "struct vfsmount".
+ * @flags: Unmount options.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_sb_umount(struct vfsmount *mnt, int flags)
+{
+ struct path path = { .mnt = mnt, .dentry = mnt->mnt_root };
+
+ return tomoyo_path_perm(TOMOYO_TYPE_UMOUNT, &path, NULL);
+}
+
+/**
+ * tomoyo_sb_pivotroot - Target for security_sb_pivotroot().
+ *
+ * @old_path: Pointer to "struct path".
+ * @new_path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_sb_pivotroot(const struct path *old_path, const struct path *new_path)
+{
+ return tomoyo_path2_perm(TOMOYO_TYPE_PIVOT_ROOT, new_path, old_path);
+}
+
+/**
+ * tomoyo_socket_listen - Check permission for listen().
+ *
+ * @sock: Pointer to "struct socket".
+ * @backlog: Backlog parameter.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_socket_listen(struct socket *sock, int backlog)
+{
+ return tomoyo_socket_listen_permission(sock);
+}
+
+/**
+ * tomoyo_socket_connect - Check permission for connect().
+ *
+ * @sock: Pointer to "struct socket".
+ * @addr: Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_socket_connect(struct socket *sock, struct sockaddr *addr,
+ int addr_len)
+{
+ return tomoyo_socket_connect_permission(sock, addr, addr_len);
+}
+
+/**
+ * tomoyo_socket_bind - Check permission for bind().
+ *
+ * @sock: Pointer to "struct socket".
+ * @addr: Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_socket_bind(struct socket *sock, struct sockaddr *addr,
+ int addr_len)
+{
+ return tomoyo_socket_bind_permission(sock, addr, addr_len);
+}
+
+/**
+ * tomoyo_socket_sendmsg - Check permission for sendmsg().
+ *
+ * @sock: Pointer to "struct socket".
+ * @msg: Pointer to "struct msghdr".
+ * @size: Size of message.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_socket_sendmsg(struct socket *sock, struct msghdr *msg,
+ int size)
+{
+ return tomoyo_socket_sendmsg_permission(sock, msg, size);
+}
+
+struct lsm_blob_sizes tomoyo_blob_sizes __lsm_ro_after_init = {
+ .lbs_task = sizeof(struct tomoyo_task),
+};
+
+/**
+ * tomoyo_task_alloc - Target for security_task_alloc().
+ *
+ * @task: Pointer to "struct task_struct".
+ * @flags: clone() flags.
+ *
+ * Returns 0.
+ */
+static int tomoyo_task_alloc(struct task_struct *task,
+ unsigned long clone_flags)
+{
+ struct tomoyo_task *old = tomoyo_task(current);
+ struct tomoyo_task *new = tomoyo_task(task);
+
+ new->domain_info = old->domain_info;
+ atomic_inc(&new->domain_info->users);
+ new->old_domain_info = NULL;
+ return 0;
+}
+
+/**
+ * tomoyo_task_free - Target for security_task_free().
+ *
+ * @task: Pointer to "struct task_struct".
+ */
+static void tomoyo_task_free(struct task_struct *task)
+{
+ struct tomoyo_task *s = tomoyo_task(task);
+
+ if (s->domain_info) {
+ atomic_dec(&s->domain_info->users);
+ s->domain_info = NULL;
+ }
+ if (s->old_domain_info) {
+ atomic_dec(&s->old_domain_info->users);
+ s->old_domain_info = NULL;
+ }
+}
+
+/*
+ * tomoyo_security_ops is a "struct security_operations" which is used for
+ * registering TOMOYO.
+ */
+static struct security_hook_list tomoyo_hooks[] __lsm_ro_after_init = {
+ LSM_HOOK_INIT(cred_prepare, tomoyo_cred_prepare),
+ LSM_HOOK_INIT(bprm_committed_creds, tomoyo_bprm_committed_creds),
+ LSM_HOOK_INIT(task_alloc, tomoyo_task_alloc),
+ LSM_HOOK_INIT(task_free, tomoyo_task_free),
+#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+ LSM_HOOK_INIT(bprm_creds_for_exec, tomoyo_bprm_creds_for_exec),
+#endif
+ LSM_HOOK_INIT(bprm_check_security, tomoyo_bprm_check_security),
+ LSM_HOOK_INIT(file_fcntl, tomoyo_file_fcntl),
+ LSM_HOOK_INIT(file_open, tomoyo_file_open),
+ LSM_HOOK_INIT(path_truncate, tomoyo_path_truncate),
+ LSM_HOOK_INIT(path_unlink, tomoyo_path_unlink),
+ LSM_HOOK_INIT(path_mkdir, tomoyo_path_mkdir),
+ LSM_HOOK_INIT(path_rmdir, tomoyo_path_rmdir),
+ LSM_HOOK_INIT(path_symlink, tomoyo_path_symlink),
+ LSM_HOOK_INIT(path_mknod, tomoyo_path_mknod),
+ LSM_HOOK_INIT(path_link, tomoyo_path_link),
+ LSM_HOOK_INIT(path_rename, tomoyo_path_rename),
+ LSM_HOOK_INIT(inode_getattr, tomoyo_inode_getattr),
+ LSM_HOOK_INIT(file_ioctl, tomoyo_file_ioctl),
+ LSM_HOOK_INIT(path_chmod, tomoyo_path_chmod),
+ LSM_HOOK_INIT(path_chown, tomoyo_path_chown),
+ LSM_HOOK_INIT(path_chroot, tomoyo_path_chroot),
+ LSM_HOOK_INIT(sb_mount, tomoyo_sb_mount),
+ LSM_HOOK_INIT(sb_umount, tomoyo_sb_umount),
+ LSM_HOOK_INIT(sb_pivotroot, tomoyo_sb_pivotroot),
+ LSM_HOOK_INIT(socket_bind, tomoyo_socket_bind),
+ LSM_HOOK_INIT(socket_connect, tomoyo_socket_connect),
+ LSM_HOOK_INIT(socket_listen, tomoyo_socket_listen),
+ LSM_HOOK_INIT(socket_sendmsg, tomoyo_socket_sendmsg),
+};
+
+/* Lock for GC. */
+DEFINE_SRCU(tomoyo_ss);
+
+int tomoyo_enabled __lsm_ro_after_init = 1;
+
+/**
+ * tomoyo_init - Register TOMOYO Linux as a LSM module.
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_init(void)
+{
+ struct tomoyo_task *s = tomoyo_task(current);
+
+ /* register ourselves with the security framework */
+ security_add_hooks(tomoyo_hooks, ARRAY_SIZE(tomoyo_hooks), "tomoyo");
+ pr_info("TOMOYO Linux initialized\n");
+ s->domain_info = &tomoyo_kernel_domain;
+ atomic_inc(&tomoyo_kernel_domain.users);
+ s->old_domain_info = NULL;
+ tomoyo_mm_init();
+
+ return 0;
+}
+
+DEFINE_LSM(tomoyo) = {
+ .name = "tomoyo",
+ .enabled = &tomoyo_enabled,
+ .flags = LSM_FLAG_LEGACY_MAJOR,
+ .blobs = &tomoyo_blob_sizes,
+ .init = tomoyo_init,
+};
diff --git a/security/tomoyo/util.c b/security/tomoyo/util.c
new file mode 100644
index 000000000..11dd8260c
--- /dev/null
+++ b/security/tomoyo/util.c
@@ -0,0 +1,1101 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * security/tomoyo/util.c
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#include <linux/slab.h>
+#include <linux/rculist.h>
+
+#include "common.h"
+
+/* Lock for protecting policy. */
+DEFINE_MUTEX(tomoyo_policy_lock);
+
+/* Has /sbin/init started? */
+bool tomoyo_policy_loaded;
+
+/*
+ * Mapping table from "enum tomoyo_mac_index" to
+ * "enum tomoyo_mac_category_index".
+ */
+const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX] = {
+ /* CONFIG::file group */
+ [TOMOYO_MAC_FILE_EXECUTE] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_OPEN] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_CREATE] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_UNLINK] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_GETATTR] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_MKDIR] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_RMDIR] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_MKFIFO] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_MKSOCK] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_TRUNCATE] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_SYMLINK] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_MKBLOCK] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_MKCHAR] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_LINK] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_RENAME] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_CHMOD] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_CHOWN] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_CHGRP] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_IOCTL] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_CHROOT] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_MOUNT] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_UMOUNT] = TOMOYO_MAC_CATEGORY_FILE,
+ [TOMOYO_MAC_FILE_PIVOT_ROOT] = TOMOYO_MAC_CATEGORY_FILE,
+ /* CONFIG::network group */
+ [TOMOYO_MAC_NETWORK_INET_STREAM_BIND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_INET_RAW_BIND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_INET_RAW_SEND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ [TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] =
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ /* CONFIG::misc group */
+ [TOMOYO_MAC_ENVIRON] = TOMOYO_MAC_CATEGORY_MISC,
+};
+
+/**
+ * tomoyo_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
+ *
+ * @time: Seconds since 1970/01/01 00:00:00.
+ * @stamp: Pointer to "struct tomoyo_time".
+ *
+ * Returns nothing.
+ */
+void tomoyo_convert_time(time64_t time64, struct tomoyo_time *stamp)
+{
+ struct tm tm;
+
+ time64_to_tm(time64, 0, &tm);
+ stamp->sec = tm.tm_sec;
+ stamp->min = tm.tm_min;
+ stamp->hour = tm.tm_hour;
+ stamp->day = tm.tm_mday;
+ stamp->month = tm.tm_mon + 1;
+ stamp->year = tm.tm_year + 1900;
+}
+
+/**
+ * tomoyo_permstr - Find permission keywords.
+ *
+ * @string: String representation for permissions in foo/bar/buz format.
+ * @keyword: Keyword to find from @string/
+ *
+ * Returns true if @keyword was found in @string, false otherwise.
+ *
+ * This function assumes that strncmp(w1, w2, strlen(w1)) != 0 if w1 != w2.
+ */
+bool tomoyo_permstr(const char *string, const char *keyword)
+{
+ const char *cp = strstr(string, keyword);
+
+ if (cp)
+ return cp == string || *(cp - 1) == '/';
+ return false;
+}
+
+/**
+ * tomoyo_read_token - Read a word from a line.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns a word on success, "" otherwise.
+ *
+ * To allow the caller to skip NULL check, this function returns "" rather than
+ * NULL if there is no more words to read.
+ */
+char *tomoyo_read_token(struct tomoyo_acl_param *param)
+{
+ char *pos = param->data;
+ char *del = strchr(pos, ' ');
+
+ if (del)
+ *del++ = '\0';
+ else
+ del = pos + strlen(pos);
+ param->data = del;
+ return pos;
+}
+
+static bool tomoyo_correct_path2(const char *filename, const size_t len);
+
+/**
+ * tomoyo_get_domainname - Read a domainname from a line.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns a domainname on success, NULL otherwise.
+ */
+const struct tomoyo_path_info *tomoyo_get_domainname
+(struct tomoyo_acl_param *param)
+{
+ char *start = param->data;
+ char *pos = start;
+
+ while (*pos) {
+ if (*pos++ != ' ' ||
+ tomoyo_correct_path2(pos, strchrnul(pos, ' ') - pos))
+ continue;
+ *(pos - 1) = '\0';
+ break;
+ }
+ param->data = pos;
+ if (tomoyo_correct_domain(start))
+ return tomoyo_get_name(start);
+ return NULL;
+}
+
+/**
+ * tomoyo_parse_ulong - Parse an "unsigned long" value.
+ *
+ * @result: Pointer to "unsigned long".
+ * @str: Pointer to string to parse.
+ *
+ * Returns one of values in "enum tomoyo_value_type".
+ *
+ * The @src is updated to point the first character after the value
+ * on success.
+ */
+u8 tomoyo_parse_ulong(unsigned long *result, char **str)
+{
+ const char *cp = *str;
+ char *ep;
+ int base = 10;
+
+ if (*cp == '0') {
+ char c = *(cp + 1);
+
+ if (c == 'x' || c == 'X') {
+ base = 16;
+ cp += 2;
+ } else if (c >= '0' && c <= '7') {
+ base = 8;
+ cp++;
+ }
+ }
+ *result = simple_strtoul(cp, &ep, base);
+ if (cp == ep)
+ return TOMOYO_VALUE_TYPE_INVALID;
+ *str = ep;
+ switch (base) {
+ case 16:
+ return TOMOYO_VALUE_TYPE_HEXADECIMAL;
+ case 8:
+ return TOMOYO_VALUE_TYPE_OCTAL;
+ default:
+ return TOMOYO_VALUE_TYPE_DECIMAL;
+ }
+}
+
+/**
+ * tomoyo_print_ulong - Print an "unsigned long" value.
+ *
+ * @buffer: Pointer to buffer.
+ * @buffer_len: Size of @buffer.
+ * @value: An "unsigned long" value.
+ * @type: Type of @value.
+ *
+ * Returns nothing.
+ */
+void tomoyo_print_ulong(char *buffer, const int buffer_len,
+ const unsigned long value, const u8 type)
+{
+ if (type == TOMOYO_VALUE_TYPE_DECIMAL)
+ snprintf(buffer, buffer_len, "%lu", value);
+ else if (type == TOMOYO_VALUE_TYPE_OCTAL)
+ snprintf(buffer, buffer_len, "0%lo", value);
+ else if (type == TOMOYO_VALUE_TYPE_HEXADECIMAL)
+ snprintf(buffer, buffer_len, "0x%lX", value);
+ else
+ snprintf(buffer, buffer_len, "type(%u)", type);
+}
+
+/**
+ * tomoyo_parse_name_union - Parse a tomoyo_name_union.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @ptr: Pointer to "struct tomoyo_name_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
+ struct tomoyo_name_union *ptr)
+{
+ char *filename;
+
+ if (param->data[0] == '@') {
+ param->data++;
+ ptr->group = tomoyo_get_group(param, TOMOYO_PATH_GROUP);
+ return ptr->group != NULL;
+ }
+ filename = tomoyo_read_token(param);
+ if (!tomoyo_correct_word(filename))
+ return false;
+ ptr->filename = tomoyo_get_name(filename);
+ return ptr->filename != NULL;
+}
+
+/**
+ * tomoyo_parse_number_union - Parse a tomoyo_number_union.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @ptr: Pointer to "struct tomoyo_number_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
+ struct tomoyo_number_union *ptr)
+{
+ char *data;
+ u8 type;
+ unsigned long v;
+
+ memset(ptr, 0, sizeof(*ptr));
+ if (param->data[0] == '@') {
+ param->data++;
+ ptr->group = tomoyo_get_group(param, TOMOYO_NUMBER_GROUP);
+ return ptr->group != NULL;
+ }
+ data = tomoyo_read_token(param);
+ type = tomoyo_parse_ulong(&v, &data);
+ if (type == TOMOYO_VALUE_TYPE_INVALID)
+ return false;
+ ptr->values[0] = v;
+ ptr->value_type[0] = type;
+ if (!*data) {
+ ptr->values[1] = v;
+ ptr->value_type[1] = type;
+ return true;
+ }
+ if (*data++ != '-')
+ return false;
+ type = tomoyo_parse_ulong(&v, &data);
+ if (type == TOMOYO_VALUE_TYPE_INVALID || *data || ptr->values[0] > v)
+ return false;
+ ptr->values[1] = v;
+ ptr->value_type[1] = type;
+ return true;
+}
+
+/**
+ * tomoyo_byte_range - Check whether the string is a \ooo style octal value.
+ *
+ * @str: Pointer to the string.
+ *
+ * Returns true if @str is a \ooo style octal value, false otherwise.
+ *
+ * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF.
+ * This function verifies that \ooo is in valid range.
+ */
+static inline bool tomoyo_byte_range(const char *str)
+{
+ return *str >= '0' && *str++ <= '3' &&
+ *str >= '0' && *str++ <= '7' &&
+ *str >= '0' && *str <= '7';
+}
+
+/**
+ * tomoyo_alphabet_char - Check whether the character is an alphabet.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is an alphabet character, false otherwise.
+ */
+static inline bool tomoyo_alphabet_char(const char c)
+{
+ return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
+}
+
+/**
+ * tomoyo_make_byte - Make byte value from three octal characters.
+ *
+ * @c1: The first character.
+ * @c2: The second character.
+ * @c3: The third character.
+ *
+ * Returns byte value.
+ */
+static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3)
+{
+ return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
+}
+
+/**
+ * tomoyo_valid - Check whether the character is a valid char.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is a valid character, false otherwise.
+ */
+static inline bool tomoyo_valid(const unsigned char c)
+{
+ return c > ' ' && c < 127;
+}
+
+/**
+ * tomoyo_invalid - Check whether the character is an invalid char.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is an invalid character, false otherwise.
+ */
+static inline bool tomoyo_invalid(const unsigned char c)
+{
+ return c && (c <= ' ' || c >= 127);
+}
+
+/**
+ * tomoyo_str_starts - Check whether the given string starts with the given keyword.
+ *
+ * @src: Pointer to pointer to the string.
+ * @find: Pointer to the keyword.
+ *
+ * Returns true if @src starts with @find, false otherwise.
+ *
+ * The @src is updated to point the first character after the @find
+ * if @src starts with @find.
+ */
+bool tomoyo_str_starts(char **src, const char *find)
+{
+ const int len = strlen(find);
+ char *tmp = *src;
+
+ if (strncmp(tmp, find, len))
+ return false;
+ tmp += len;
+ *src = tmp;
+ return true;
+}
+
+/**
+ * tomoyo_normalize_line - Format string.
+ *
+ * @buffer: The line to normalize.
+ *
+ * Leading and trailing whitespaces are removed.
+ * Multiple whitespaces are packed into single space.
+ *
+ * Returns nothing.
+ */
+void tomoyo_normalize_line(unsigned char *buffer)
+{
+ unsigned char *sp = buffer;
+ unsigned char *dp = buffer;
+ bool first = true;
+
+ while (tomoyo_invalid(*sp))
+ sp++;
+ while (*sp) {
+ if (!first)
+ *dp++ = ' ';
+ first = false;
+ while (tomoyo_valid(*sp))
+ *dp++ = *sp++;
+ while (tomoyo_invalid(*sp))
+ sp++;
+ }
+ *dp = '\0';
+}
+
+/**
+ * tomoyo_correct_word2 - Validate a string.
+ *
+ * @string: The string to check. Maybe non-'\0'-terminated.
+ * @len: Length of @string.
+ *
+ * Check whether the given string follows the naming rules.
+ * Returns true if @string follows the naming rules, false otherwise.
+ */
+static bool tomoyo_correct_word2(const char *string, size_t len)
+{
+ const char *const start = string;
+ bool in_repetition = false;
+ unsigned char c;
+ unsigned char d;
+ unsigned char e;
+
+ if (!len)
+ goto out;
+ while (len--) {
+ c = *string++;
+ if (c == '\\') {
+ if (!len--)
+ goto out;
+ c = *string++;
+ switch (c) {
+ case '\\': /* "\\" */
+ continue;
+ case '$': /* "\$" */
+ case '+': /* "\+" */
+ case '?': /* "\?" */
+ case '*': /* "\*" */
+ case '@': /* "\@" */
+ case 'x': /* "\x" */
+ case 'X': /* "\X" */
+ case 'a': /* "\a" */
+ case 'A': /* "\A" */
+ case '-': /* "\-" */
+ continue;
+ case '{': /* "/\{" */
+ if (string - 3 < start || *(string - 3) != '/')
+ break;
+ in_repetition = true;
+ continue;
+ case '}': /* "\}/" */
+ if (*string != '/')
+ break;
+ if (!in_repetition)
+ break;
+ in_repetition = false;
+ continue;
+ case '0': /* "\ooo" */
+ case '1':
+ case '2':
+ case '3':
+ if (!len-- || !len--)
+ break;
+ d = *string++;
+ e = *string++;
+ if (d < '0' || d > '7' || e < '0' || e > '7')
+ break;
+ c = tomoyo_make_byte(c, d, e);
+ if (c <= ' ' || c >= 127)
+ continue;
+ }
+ goto out;
+ } else if (in_repetition && c == '/') {
+ goto out;
+ } else if (c <= ' ' || c >= 127) {
+ goto out;
+ }
+ }
+ if (in_repetition)
+ goto out;
+ return true;
+ out:
+ return false;
+}
+
+/**
+ * tomoyo_correct_word - Validate a string.
+ *
+ * @string: The string to check.
+ *
+ * Check whether the given string follows the naming rules.
+ * Returns true if @string follows the naming rules, false otherwise.
+ */
+bool tomoyo_correct_word(const char *string)
+{
+ return tomoyo_correct_word2(string, strlen(string));
+}
+
+/**
+ * tomoyo_correct_path2 - Check whether the given pathname follows the naming rules.
+ *
+ * @filename: The pathname to check.
+ * @len: Length of @filename.
+ *
+ * Returns true if @filename follows the naming rules, false otherwise.
+ */
+static bool tomoyo_correct_path2(const char *filename, const size_t len)
+{
+ const char *cp1 = memchr(filename, '/', len);
+ const char *cp2 = memchr(filename, '.', len);
+
+ return cp1 && (!cp2 || (cp1 < cp2)) && tomoyo_correct_word2(filename, len);
+}
+
+/**
+ * tomoyo_correct_path - Validate a pathname.
+ *
+ * @filename: The pathname to check.
+ *
+ * Check whether the given pathname follows the naming rules.
+ * Returns true if @filename follows the naming rules, false otherwise.
+ */
+bool tomoyo_correct_path(const char *filename)
+{
+ return tomoyo_correct_path2(filename, strlen(filename));
+}
+
+/**
+ * tomoyo_correct_domain - Check whether the given domainname follows the naming rules.
+ *
+ * @domainname: The domainname to check.
+ *
+ * Returns true if @domainname follows the naming rules, false otherwise.
+ */
+bool tomoyo_correct_domain(const unsigned char *domainname)
+{
+ if (!domainname || !tomoyo_domain_def(domainname))
+ return false;
+ domainname = strchr(domainname, ' ');
+ if (!domainname++)
+ return true;
+ while (1) {
+ const unsigned char *cp = strchr(domainname, ' ');
+
+ if (!cp)
+ break;
+ if (!tomoyo_correct_path2(domainname, cp - domainname))
+ return false;
+ domainname = cp + 1;
+ }
+ return tomoyo_correct_path(domainname);
+}
+
+/**
+ * tomoyo_domain_def - Check whether the given token can be a domainname.
+ *
+ * @buffer: The token to check.
+ *
+ * Returns true if @buffer possibly be a domainname, false otherwise.
+ */
+bool tomoyo_domain_def(const unsigned char *buffer)
+{
+ const unsigned char *cp;
+ int len;
+
+ if (*buffer != '<')
+ return false;
+ cp = strchr(buffer, ' ');
+ if (!cp)
+ len = strlen(buffer);
+ else
+ len = cp - buffer;
+ if (buffer[len - 1] != '>' ||
+ !tomoyo_correct_word2(buffer + 1, len - 2))
+ return false;
+ return true;
+}
+
+/**
+ * tomoyo_find_domain - Find a domain by the given name.
+ *
+ * @domainname: The domainname to find.
+ *
+ * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname)
+{
+ struct tomoyo_domain_info *domain;
+ struct tomoyo_path_info name;
+
+ name.name = domainname;
+ tomoyo_fill_path_info(&name);
+ list_for_each_entry_rcu(domain, &tomoyo_domain_list, list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ if (!domain->is_deleted &&
+ !tomoyo_pathcmp(&name, domain->domainname))
+ return domain;
+ }
+ return NULL;
+}
+
+/**
+ * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token.
+ *
+ * @filename: The string to evaluate.
+ *
+ * Returns the initial length without a pattern in @filename.
+ */
+static int tomoyo_const_part_length(const char *filename)
+{
+ char c;
+ int len = 0;
+
+ if (!filename)
+ return 0;
+ while ((c = *filename++) != '\0') {
+ if (c != '\\') {
+ len++;
+ continue;
+ }
+ c = *filename++;
+ switch (c) {
+ case '\\': /* "\\" */
+ len += 2;
+ continue;
+ case '0': /* "\ooo" */
+ case '1':
+ case '2':
+ case '3':
+ c = *filename++;
+ if (c < '0' || c > '7')
+ break;
+ c = *filename++;
+ if (c < '0' || c > '7')
+ break;
+ len += 4;
+ continue;
+ }
+ break;
+ }
+ return len;
+}
+
+/**
+ * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members.
+ *
+ * @ptr: Pointer to "struct tomoyo_path_info" to fill in.
+ *
+ * The caller sets "struct tomoyo_path_info"->name.
+ */
+void tomoyo_fill_path_info(struct tomoyo_path_info *ptr)
+{
+ const char *name = ptr->name;
+ const int len = strlen(name);
+
+ ptr->const_len = tomoyo_const_part_length(name);
+ ptr->is_dir = len && (name[len - 1] == '/');
+ ptr->is_patterned = (ptr->const_len < len);
+ ptr->hash = full_name_hash(NULL, name, len);
+}
+
+/**
+ * tomoyo_file_matches_pattern2 - Pattern matching without '/' character and "\-" pattern.
+ *
+ * @filename: The start of string to check.
+ * @filename_end: The end of string to check.
+ * @pattern: The start of pattern to compare.
+ * @pattern_end: The end of pattern to compare.
+ *
+ * Returns true if @filename matches @pattern, false otherwise.
+ */
+static bool tomoyo_file_matches_pattern2(const char *filename,
+ const char *filename_end,
+ const char *pattern,
+ const char *pattern_end)
+{
+ while (filename < filename_end && pattern < pattern_end) {
+ char c;
+ int i;
+ int j;
+
+ if (*pattern != '\\') {
+ if (*filename++ != *pattern++)
+ return false;
+ continue;
+ }
+ c = *filename;
+ pattern++;
+ switch (*pattern) {
+ case '?':
+ if (c == '/') {
+ return false;
+ } else if (c == '\\') {
+ if (filename[1] == '\\')
+ filename++;
+ else if (tomoyo_byte_range(filename + 1))
+ filename += 3;
+ else
+ return false;
+ }
+ break;
+ case '\\':
+ if (c != '\\')
+ return false;
+ if (*++filename != '\\')
+ return false;
+ break;
+ case '+':
+ if (!isdigit(c))
+ return false;
+ break;
+ case 'x':
+ if (!isxdigit(c))
+ return false;
+ break;
+ case 'a':
+ if (!tomoyo_alphabet_char(c))
+ return false;
+ break;
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ if (c == '\\' && tomoyo_byte_range(filename + 1)
+ && strncmp(filename + 1, pattern, 3) == 0) {
+ filename += 3;
+ pattern += 2;
+ break;
+ }
+ return false; /* Not matched. */
+ case '*':
+ case '@':
+ for (i = 0; i <= filename_end - filename; i++) {
+ if (tomoyo_file_matches_pattern2(
+ filename + i, filename_end,
+ pattern + 1, pattern_end))
+ return true;
+ c = filename[i];
+ if (c == '.' && *pattern == '@')
+ break;
+ if (c != '\\')
+ continue;
+ if (filename[i + 1] == '\\')
+ i++;
+ else if (tomoyo_byte_range(filename + i + 1))
+ i += 3;
+ else
+ break; /* Bad pattern. */
+ }
+ return false; /* Not matched. */
+ default:
+ j = 0;
+ c = *pattern;
+ if (c == '$') {
+ while (isdigit(filename[j]))
+ j++;
+ } else if (c == 'X') {
+ while (isxdigit(filename[j]))
+ j++;
+ } else if (c == 'A') {
+ while (tomoyo_alphabet_char(filename[j]))
+ j++;
+ }
+ for (i = 1; i <= j; i++) {
+ if (tomoyo_file_matches_pattern2(
+ filename + i, filename_end,
+ pattern + 1, pattern_end))
+ return true;
+ }
+ return false; /* Not matched or bad pattern. */
+ }
+ filename++;
+ pattern++;
+ }
+ while (*pattern == '\\' &&
+ (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
+ pattern += 2;
+ return filename == filename_end && pattern == pattern_end;
+}
+
+/**
+ * tomoyo_file_matches_pattern - Pattern matching without '/' character.
+ *
+ * @filename: The start of string to check.
+ * @filename_end: The end of string to check.
+ * @pattern: The start of pattern to compare.
+ * @pattern_end: The end of pattern to compare.
+ *
+ * Returns true if @filename matches @pattern, false otherwise.
+ */
+static bool tomoyo_file_matches_pattern(const char *filename,
+ const char *filename_end,
+ const char *pattern,
+ const char *pattern_end)
+{
+ const char *pattern_start = pattern;
+ bool first = true;
+ bool result;
+
+ while (pattern < pattern_end - 1) {
+ /* Split at "\-" pattern. */
+ if (*pattern++ != '\\' || *pattern++ != '-')
+ continue;
+ result = tomoyo_file_matches_pattern2(filename,
+ filename_end,
+ pattern_start,
+ pattern - 2);
+ if (first)
+ result = !result;
+ if (result)
+ return false;
+ first = false;
+ pattern_start = pattern;
+ }
+ result = tomoyo_file_matches_pattern2(filename, filename_end,
+ pattern_start, pattern_end);
+ return first ? result : !result;
+}
+
+/**
+ * tomoyo_path_matches_pattern2 - Do pathname pattern matching.
+ *
+ * @f: The start of string to check.
+ * @p: The start of pattern to compare.
+ *
+ * Returns true if @f matches @p, false otherwise.
+ */
+static bool tomoyo_path_matches_pattern2(const char *f, const char *p)
+{
+ const char *f_delimiter;
+ const char *p_delimiter;
+
+ while (*f && *p) {
+ f_delimiter = strchr(f, '/');
+ if (!f_delimiter)
+ f_delimiter = f + strlen(f);
+ p_delimiter = strchr(p, '/');
+ if (!p_delimiter)
+ p_delimiter = p + strlen(p);
+ if (*p == '\\' && *(p + 1) == '{')
+ goto recursive;
+ if (!tomoyo_file_matches_pattern(f, f_delimiter, p,
+ p_delimiter))
+ return false;
+ f = f_delimiter;
+ if (*f)
+ f++;
+ p = p_delimiter;
+ if (*p)
+ p++;
+ }
+ /* Ignore trailing "\*" and "\@" in @pattern. */
+ while (*p == '\\' &&
+ (*(p + 1) == '*' || *(p + 1) == '@'))
+ p += 2;
+ return !*f && !*p;
+ recursive:
+ /*
+ * The "\{" pattern is permitted only after '/' character.
+ * This guarantees that below "*(p - 1)" is safe.
+ * Also, the "\}" pattern is permitted only before '/' character
+ * so that "\{" + "\}" pair will not break the "\-" operator.
+ */
+ if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' ||
+ *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\')
+ return false; /* Bad pattern. */
+ do {
+ /* Compare current component with pattern. */
+ if (!tomoyo_file_matches_pattern(f, f_delimiter, p + 2,
+ p_delimiter - 2))
+ break;
+ /* Proceed to next component. */
+ f = f_delimiter;
+ if (!*f)
+ break;
+ f++;
+ /* Continue comparison. */
+ if (tomoyo_path_matches_pattern2(f, p_delimiter + 1))
+ return true;
+ f_delimiter = strchr(f, '/');
+ } while (f_delimiter);
+ return false; /* Not matched. */
+}
+
+/**
+ * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern.
+ *
+ * @filename: The filename to check.
+ * @pattern: The pattern to compare.
+ *
+ * Returns true if matches, false otherwise.
+ *
+ * The following patterns are available.
+ * \\ \ itself.
+ * \ooo Octal representation of a byte.
+ * \* Zero or more repetitions of characters other than '/'.
+ * \@ Zero or more repetitions of characters other than '/' or '.'.
+ * \? 1 byte character other than '/'.
+ * \$ One or more repetitions of decimal digits.
+ * \+ 1 decimal digit.
+ * \X One or more repetitions of hexadecimal digits.
+ * \x 1 hexadecimal digit.
+ * \A One or more repetitions of alphabet characters.
+ * \a 1 alphabet character.
+ *
+ * \- Subtraction operator.
+ *
+ * /\{dir\}/ '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/
+ * /dir/dir/dir/ ).
+ */
+bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
+ const struct tomoyo_path_info *pattern)
+{
+ const char *f = filename->name;
+ const char *p = pattern->name;
+ const int len = pattern->const_len;
+
+ /* If @pattern doesn't contain pattern, I can use strcmp(). */
+ if (!pattern->is_patterned)
+ return !tomoyo_pathcmp(filename, pattern);
+ /* Don't compare directory and non-directory. */
+ if (filename->is_dir != pattern->is_dir)
+ return false;
+ /* Compare the initial length without patterns. */
+ if (strncmp(f, p, len))
+ return false;
+ f += len;
+ p += len;
+ return tomoyo_path_matches_pattern2(f, p);
+}
+
+/**
+ * tomoyo_get_exe - Get tomoyo_realpath() of current process.
+ *
+ * Returns the tomoyo_realpath() of current process on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so the caller must call kfree()
+ * if this function didn't return NULL.
+ */
+const char *tomoyo_get_exe(void)
+{
+ struct file *exe_file;
+ const char *cp;
+ struct mm_struct *mm = current->mm;
+
+ if (!mm)
+ return NULL;
+ exe_file = get_mm_exe_file(mm);
+ if (!exe_file)
+ return NULL;
+
+ cp = tomoyo_realpath_from_path(&exe_file->f_path);
+ fput(exe_file);
+ return cp;
+}
+
+/**
+ * tomoyo_get_mode - Get MAC mode.
+ *
+ * @ns: Pointer to "struct tomoyo_policy_namespace".
+ * @profile: Profile number.
+ * @index: Index number of functionality.
+ *
+ * Returns mode.
+ */
+int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
+ const u8 index)
+{
+ u8 mode;
+ struct tomoyo_profile *p;
+
+ if (!tomoyo_policy_loaded)
+ return TOMOYO_CONFIG_DISABLED;
+ p = tomoyo_profile(ns, profile);
+ mode = p->config[index];
+ if (mode == TOMOYO_CONFIG_USE_DEFAULT)
+ mode = p->config[tomoyo_index2category[index]
+ + TOMOYO_MAX_MAC_INDEX];
+ if (mode == TOMOYO_CONFIG_USE_DEFAULT)
+ mode = p->default_config;
+ return mode & 3;
+}
+
+/**
+ * tomoyo_init_request_info - Initialize "struct tomoyo_request_info" members.
+ *
+ * @r: Pointer to "struct tomoyo_request_info" to initialize.
+ * @domain: Pointer to "struct tomoyo_domain_info". NULL for tomoyo_domain().
+ * @index: Index number of functionality.
+ *
+ * Returns mode.
+ */
+int tomoyo_init_request_info(struct tomoyo_request_info *r,
+ struct tomoyo_domain_info *domain, const u8 index)
+{
+ u8 profile;
+
+ memset(r, 0, sizeof(*r));
+ if (!domain)
+ domain = tomoyo_domain();
+ r->domain = domain;
+ profile = domain->profile;
+ r->profile = profile;
+ r->type = index;
+ r->mode = tomoyo_get_mode(domain->ns, profile, index);
+ return r->mode;
+}
+
+/**
+ * tomoyo_domain_quota_is_ok - Check for domain's quota.
+ *
+ * @r: Pointer to "struct tomoyo_request_info".
+ *
+ * Returns true if the domain is not exceeded quota, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r)
+{
+ unsigned int count = 0;
+ struct tomoyo_domain_info *domain = r->domain;
+ struct tomoyo_acl_info *ptr;
+
+ if (r->mode != TOMOYO_CONFIG_LEARNING)
+ return false;
+ if (!domain)
+ return true;
+ if (READ_ONCE(domain->flags[TOMOYO_DIF_QUOTA_WARNED]))
+ return false;
+ list_for_each_entry_rcu(ptr, &domain->acl_info_list, list,
+ srcu_read_lock_held(&tomoyo_ss)) {
+ u16 perm;
+
+ if (ptr->is_deleted)
+ continue;
+ /*
+ * Reading perm bitmap might race with tomoyo_merge_*() because
+ * caller does not hold tomoyo_policy_lock mutex. But exceeding
+ * max_learning_entry parameter by a few entries does not harm.
+ */
+ switch (ptr->type) {
+ case TOMOYO_TYPE_PATH_ACL:
+ perm = data_race(container_of(ptr, struct tomoyo_path_acl, head)->perm);
+ break;
+ case TOMOYO_TYPE_PATH2_ACL:
+ perm = data_race(container_of(ptr, struct tomoyo_path2_acl, head)->perm);
+ break;
+ case TOMOYO_TYPE_PATH_NUMBER_ACL:
+ perm = data_race(container_of(ptr, struct tomoyo_path_number_acl, head)
+ ->perm);
+ break;
+ case TOMOYO_TYPE_MKDEV_ACL:
+ perm = data_race(container_of(ptr, struct tomoyo_mkdev_acl, head)->perm);
+ break;
+ case TOMOYO_TYPE_INET_ACL:
+ perm = data_race(container_of(ptr, struct tomoyo_inet_acl, head)->perm);
+ break;
+ case TOMOYO_TYPE_UNIX_ACL:
+ perm = data_race(container_of(ptr, struct tomoyo_unix_acl, head)->perm);
+ break;
+ case TOMOYO_TYPE_MANUAL_TASK_ACL:
+ perm = 0;
+ break;
+ default:
+ perm = 1;
+ }
+ count += hweight16(perm);
+ }
+ if (count < tomoyo_profile(domain->ns, domain->profile)->
+ pref[TOMOYO_PREF_MAX_LEARNING_ENTRY])
+ return true;
+ WRITE_ONCE(domain->flags[TOMOYO_DIF_QUOTA_WARNED], true);
+ /* r->granted = false; */
+ tomoyo_write_log(r, "%s", tomoyo_dif[TOMOYO_DIF_QUOTA_WARNED]);
+#ifndef CONFIG_SECURITY_TOMOYO_INSECURE_BUILTIN_SETTING
+ pr_warn("WARNING: Domain '%s' has too many ACLs to hold. Stopped learning mode.\n",
+ domain->domainname->name);
+#endif
+ return false;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 18:04:56 +0000