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-rw-r--r--security/selinux/Kconfig10
-rw-r--r--security/selinux/Makefile2
-rw-r--r--security/selinux/hooks.c10
-rw-r--r--security/selinux/selinuxfs.c2
-rw-r--r--security/selinux/ss/avtab.c37
-rw-r--r--security/selinux/ss/hashtab.c5
-rw-r--r--security/selinux/ss/hashtab.h1
-rw-r--r--security/selinux/ss/policydb.c6
-rw-r--r--security/selinux/ss/sidtab.c2
9 files changed, 39 insertions, 36 deletions
diff --git a/security/selinux/Kconfig b/security/selinux/Kconfig
index d30348fbe0..61abc1e094 100644
--- a/security/selinux/Kconfig
+++ b/security/selinux/Kconfig
@@ -77,3 +77,13 @@ config SECURITY_SELINUX_DEBUG
This enables debugging code designed to help SELinux kernel
developers, unless you know what this does in the kernel code you
should leave this disabled.
+
+ To fine control the messages to be printed enable
+ CONFIG_DYNAMIC_DEBUG and see
+ Documentation/admin-guide/dynamic-debug-howto.rst for additional
+ information.
+
+ Example usage:
+
+ echo -n 'file "security/selinux/*" +p' > \
+ /proc/dynamic_debug/control
diff --git a/security/selinux/Makefile b/security/selinux/Makefile
index 8363796390..c47519ed81 100644
--- a/security/selinux/Makefile
+++ b/security/selinux/Makefile
@@ -12,6 +12,8 @@ obj-$(CONFIG_SECURITY_SELINUX) := selinux.o
ccflags-y := -I$(srctree)/security/selinux -I$(srctree)/security/selinux/include
+ccflags-$(CONFIG_SECURITY_SELINUX_DEBUG) += -DDEBUG
+
selinux-y := avc.o hooks.o selinuxfs.o netlink.o nlmsgtab.o netif.o \
netnode.o netport.o status.o \
ss/ebitmap.o ss/hashtab.o ss/symtab.o ss/sidtab.o ss/avtab.o \
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 53cfeefb2f..102a1f0c09 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1935,7 +1935,7 @@ static inline int may_rename(struct inode *old_dir,
/* Check whether a task can perform a filesystem operation. */
static int superblock_has_perm(const struct cred *cred,
- struct super_block *sb,
+ const struct super_block *sb,
u32 perms,
struct common_audit_data *ad)
{
@@ -2137,7 +2137,7 @@ static int selinux_capable(const struct cred *cred, struct user_namespace *ns,
return cred_has_capability(cred, cap, opts, ns == &init_user_ns);
}
-static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
+static int selinux_quotactl(int cmds, int type, int id, const struct super_block *sb)
{
const struct cred *cred = current_cred();
int rc = 0;
@@ -2453,7 +2453,7 @@ static inline void flush_unauthorized_files(const struct cred *cred,
/*
* Prepare a process for imminent new credential changes due to exec
*/
-static void selinux_bprm_committing_creds(struct linux_binprm *bprm)
+static void selinux_bprm_committing_creds(const struct linux_binprm *bprm)
{
struct task_security_struct *new_tsec;
struct rlimit *rlim, *initrlim;
@@ -2499,7 +2499,7 @@ static void selinux_bprm_committing_creds(struct linux_binprm *bprm)
* Clean up the process immediately after the installation of new credentials
* due to exec
*/
-static void selinux_bprm_committed_creds(struct linux_binprm *bprm)
+static void selinux_bprm_committed_creds(const struct linux_binprm *bprm)
{
const struct task_security_struct *tsec = selinux_cred(current_cred());
u32 osid, sid;
@@ -2719,7 +2719,7 @@ out_bad_option:
return -EINVAL;
}
-static int selinux_sb_kern_mount(struct super_block *sb)
+static int selinux_sb_kern_mount(const struct super_block *sb)
{
const struct cred *cred = current_cred();
struct common_audit_data ad;
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 6fa6402632..6c596ae7fe 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1198,7 +1198,7 @@ static struct inode *sel_make_inode(struct super_block *sb, umode_t mode)
if (ret) {
ret->i_mode = mode;
- ret->i_atime = ret->i_mtime = inode_set_ctime_current(ret);
+ simple_inode_init_ts(ret);
}
return ret;
}
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index 86d98a8e29..8751a602ea 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -17,6 +17,7 @@
* Tuned number of hash slots for avtab to reduce memory usage
*/
+#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/errno.h>
@@ -66,8 +67,7 @@ static inline u32 avtab_hash(const struct avtab_key *keyp, u32 mask)
}
static struct avtab_node*
-avtab_insert_node(struct avtab *h, u32 hvalue,
- struct avtab_node *prev,
+avtab_insert_node(struct avtab *h, struct avtab_node **dst,
const struct avtab_key *key, const struct avtab_datum *datum)
{
struct avtab_node *newnode;
@@ -89,15 +89,8 @@ avtab_insert_node(struct avtab *h, u32 hvalue,
newnode->datum.u.data = datum->u.data;
}
- if (prev) {
- newnode->next = prev->next;
- prev->next = newnode;
- } else {
- struct avtab_node **n = &h->htable[hvalue];
-
- newnode->next = *n;
- *n = newnode;
- }
+ newnode->next = *dst;
+ *dst = newnode;
h->nel++;
return newnode;
@@ -137,7 +130,8 @@ static int avtab_insert(struct avtab *h, const struct avtab_key *key,
break;
}
- newnode = avtab_insert_node(h, hvalue, prev, key, datum);
+ newnode = avtab_insert_node(h, prev ? &prev->next : &h->htable[hvalue],
+ key, datum);
if (!newnode)
return -ENOMEM;
@@ -177,7 +171,8 @@ struct avtab_node *avtab_insert_nonunique(struct avtab *h,
key->target_class < cur->key.target_class)
break;
}
- return avtab_insert_node(h, hvalue, prev, key, datum);
+ return avtab_insert_node(h, prev ? &prev->next : &h->htable[hvalue],
+ key, datum);
}
/* This search function returns a node pointer, and can be used in
@@ -298,13 +293,7 @@ int avtab_alloc(struct avtab *h, u32 nrules)
u32 nslot = 0;
if (nrules != 0) {
- u32 shift = 1;
- u32 work = nrules >> 3;
- while (work) {
- work >>= 1;
- shift++;
- }
- nslot = 1 << shift;
+ nslot = nrules > 3 ? rounddown_pow_of_two(nrules / 2) : 2;
if (nslot > MAX_AVTAB_HASH_BUCKETS)
nslot = MAX_AVTAB_HASH_BUCKETS;
@@ -349,7 +338,7 @@ void avtab_hash_eval(struct avtab *h, const char *tag)
}
pr_debug("SELinux: %s: %d entries and %d/%d buckets used, "
- "longest chain length %d sum of chain length^2 %llu\n",
+ "longest chain length %d, sum of chain length^2 %llu\n",
tag, h->nel, slots_used, h->nslot, max_chain_len,
chain2_len_sum);
}
@@ -477,11 +466,7 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
return -EINVAL;
}
- set = 0;
- for (i = 0; i < ARRAY_SIZE(spec_order); i++) {
- if (key.specified & spec_order[i])
- set++;
- }
+ set = hweight16(key.specified & (AVTAB_XPERMS | AVTAB_TYPE | AVTAB_AV));
if (!set || set > 1) {
pr_err("SELinux: avtab: more than one specifier\n");
return -EINVAL;
diff --git a/security/selinux/ss/hashtab.c b/security/selinux/ss/hashtab.c
index ac5cdddfbf..c05d8346a9 100644
--- a/security/selinux/ss/hashtab.c
+++ b/security/selinux/ss/hashtab.c
@@ -107,10 +107,12 @@ int hashtab_map(struct hashtab *h,
void hashtab_stat(struct hashtab *h, struct hashtab_info *info)
{
u32 i, chain_len, slots_used, max_chain_len;
+ u64 chain2_len_sum;
struct hashtab_node *cur;
slots_used = 0;
max_chain_len = 0;
+ chain2_len_sum = 0;
for (i = 0; i < h->size; i++) {
cur = h->htable[i];
if (cur) {
@@ -123,11 +125,14 @@ void hashtab_stat(struct hashtab *h, struct hashtab_info *info)
if (chain_len > max_chain_len)
max_chain_len = chain_len;
+
+ chain2_len_sum += (u64)chain_len * chain_len;
}
}
info->slots_used = slots_used;
info->max_chain_len = max_chain_len;
+ info->chain2_len_sum = chain2_len_sum;
}
#endif /* CONFIG_SECURITY_SELINUX_DEBUG */
diff --git a/security/selinux/ss/hashtab.h b/security/selinux/ss/hashtab.h
index f9713b56d3..09b0a37449 100644
--- a/security/selinux/ss/hashtab.h
+++ b/security/selinux/ss/hashtab.h
@@ -38,6 +38,7 @@ struct hashtab {
struct hashtab_info {
u32 slots_used;
u32 max_chain_len;
+ u64 chain2_len_sum;
};
/*
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 2d528f699a..595a435ea9 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -491,7 +491,7 @@ static u32 role_trans_hash(const void *k)
{
const struct role_trans_key *key = k;
- return key->role + (key->type << 3) + (key->tclass << 5);
+ return jhash_3words(key->role, key->type, (u32)key->tclass << 16 | key->tclass, 0);
}
static int role_trans_cmp(const void *k1, const void *k2)
@@ -684,9 +684,9 @@ static void hash_eval(struct hashtab *h, const char *hash_name)
struct hashtab_info info;
hashtab_stat(h, &info);
- pr_debug("SELinux: %s: %d entries and %d/%d buckets used, longest chain length %d\n",
+ pr_debug("SELinux: %s: %d entries and %d/%d buckets used, longest chain length %d, sum of chain length^2 %llu\n",
hash_name, h->nel, info.slots_used, h->size,
- info.max_chain_len);
+ info.max_chain_len, info.chain2_len_sum);
}
static void symtab_hash_eval(struct symtab *s)
diff --git a/security/selinux/ss/sidtab.c b/security/selinux/ss/sidtab.c
index d8ead463b8..732fd8e22a 100644
--- a/security/selinux/ss/sidtab.c
+++ b/security/selinux/ss/sidtab.c
@@ -25,7 +25,7 @@ struct sidtab_str_cache {
struct list_head lru_member;
struct sidtab_entry *parent;
u32 len;
- char str[];
+ char str[] __counted_by(len);
};
#define index_to_sid(index) ((index) + SECINITSID_NUM + 1)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 20:33:27 +0000