Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1234 insertions, 0 deletions

diff --git a/src/test/test-seccomp.c b/src/test/test-seccomp.c
new file mode 100644
index 0000000..279a155
--- /dev/null
+++ b/src/test/test-seccomp.c
@@ -0,0 +1,1234 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <fcntl.h>
+#include <poll.h>
+#include <stdlib.h>
+#include <sys/eventfd.h>
+#include <sys/mman.h>
+#include <sys/personality.h>
+#include <sys/shm.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <unistd.h>
+#if HAVE_VALGRIND_VALGRIND_H
+#include <valgrind/valgrind.h>
+#endif
+
+#include "alloc-util.h"
+#include "capability-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "macro.h"
+#include "memory-util.h"
+#include "missing_sched.h"
+#include "missing_syscall.h"
+#include "nsflags.h"
+#include "nulstr-util.h"
+#include "process-util.h"
+#include "raw-clone.h"
+#include "rm-rf.h"
+#include "seccomp-util.h"
+#include "set.h"
+#include "string-util.h"
+#include "tests.h"
+#include "tmpfile-util.h"
+#include "virt.h"
+
+/* __NR_socket may be invalid due to libseccomp */
+#if !defined(__NR_socket) || __NR_socket < 0 || defined(__i386__) || defined(__s390x__) || defined(__s390__) || defined(__powerpc64__) || defined(__powerpc__)
+/* On these archs, socket() is implemented via the socketcall() syscall multiplexer,
+ * and we can't restrict it hence via seccomp. */
+#  define SECCOMP_RESTRICT_ADDRESS_FAMILIES_BROKEN 1
+#else
+#  define SECCOMP_RESTRICT_ADDRESS_FAMILIES_BROKEN 0
+#endif
+
+static bool have_seccomp_privs(void) {
+        return geteuid() == 0 && have_effective_cap(CAP_SYS_ADMIN) > 0; /* If we are root but CAP_SYS_ADMIN we can't do caps (unless we also do NNP) */
+}
+
+TEST(parse_syscall_and_errno) {
+        _cleanup_free_ char *n = NULL;
+        int e;
+
+        assert_se(parse_syscall_and_errno("uname:EILSEQ", &n, &e) >= 0);
+        assert_se(streq(n, "uname"));
+        assert_se(e == errno_from_name("EILSEQ") && e >= 0);
+        n = mfree(n);
+
+        assert_se(parse_syscall_and_errno("uname:EINVAL", &n, &e) >= 0);
+        assert_se(streq(n, "uname"));
+        assert_se(e == errno_from_name("EINVAL") && e >= 0);
+        n = mfree(n);
+
+        assert_se(parse_syscall_and_errno("@sync:4095", &n, &e) >= 0);
+        assert_se(streq(n, "@sync"));
+        assert_se(e == 4095);
+        n = mfree(n);
+
+        /* If errno is omitted, then e is set to -1 */
+        assert_se(parse_syscall_and_errno("mount", &n, &e) >= 0);
+        assert_se(streq(n, "mount"));
+        assert_se(e == -1);
+        n = mfree(n);
+
+        /* parse_syscall_and_errno() does not check the syscall name is valid or not. */
+        assert_se(parse_syscall_and_errno("hoge:255", &n, &e) >= 0);
+        assert_se(streq(n, "hoge"));
+        assert_se(e == 255);
+        n = mfree(n);
+
+        /* 0 is also a valid errno. */
+        assert_se(parse_syscall_and_errno("hoge:0", &n, &e) >= 0);
+        assert_se(streq(n, "hoge"));
+        assert_se(e == 0);
+        n = mfree(n);
+
+        assert_se(parse_syscall_and_errno("hoge:kill", &n, &e) >= 0);
+        assert_se(streq(n, "hoge"));
+        assert_se(e == SECCOMP_ERROR_NUMBER_KILL);
+        n = mfree(n);
+
+        /* The function checks the syscall name is empty or not. */
+        assert_se(parse_syscall_and_errno("", &n, &e) == -EINVAL);
+        assert_se(parse_syscall_and_errno(":255", &n, &e) == -EINVAL);
+
+        /* errno must be a valid errno name or number between 0 and ERRNO_MAX == 4095, or "kill" */
+        assert_se(parse_syscall_and_errno("hoge:4096", &n, &e) == -ERANGE);
+        assert_se(parse_syscall_and_errno("hoge:-3", &n, &e) == -ERANGE);
+        assert_se(parse_syscall_and_errno("hoge:12.3", &n, &e) == -EINVAL);
+        assert_se(parse_syscall_and_errno("hoge:123junk", &n, &e) == -EINVAL);
+        assert_se(parse_syscall_and_errno("hoge:junk123", &n, &e) == -EINVAL);
+        assert_se(parse_syscall_and_errno("hoge:255:EILSEQ", &n, &e) == -EINVAL);
+        assert_se(parse_syscall_and_errno("hoge:-EINVAL", &n, &e) == -EINVAL);
+        assert_se(parse_syscall_and_errno("hoge:EINVALaaa", &n, &e) == -EINVAL);
+        assert_se(parse_syscall_and_errno("hoge:", &n, &e) == -EINVAL);
+}
+
+TEST(seccomp_arch_to_string) {
+        uint32_t a, b;
+        const char *name;
+
+        a = seccomp_arch_native();
+        assert_se(a > 0);
+        name = seccomp_arch_to_string(a);
+        assert_se(name);
+        assert_se(seccomp_arch_from_string(name, &b) >= 0);
+        assert_se(a == b);
+}
+
+TEST(architecture_table) {
+        const char *n2;
+
+        NULSTR_FOREACH(n,
+                       "native\0"
+                       "x86\0"
+                       "x86-64\0"
+                       "x32\0"
+                       "arm\0"
+                       "arm64\0"
+#ifdef SCMP_ARCH_LOONGARCH64
+                       "loongarch64\0"
+#endif
+                       "mips\0"
+                       "mips64\0"
+                       "mips64-n32\0"
+                       "mips-le\0"
+                       "mips64-le\0"
+                       "mips64-le-n32\0"
+                       "parisc\0"
+                       "parisc64\0"
+                       "ppc\0"
+                       "ppc64\0"
+                       "ppc64-le\0"
+#ifdef SCMP_ARCH_RISCV64
+                       "riscv64\0"
+#endif
+                       "s390\0"
+                       "s390x\0") {
+                uint32_t c;
+
+                assert_se(seccomp_arch_from_string(n, &c) >= 0);
+                n2 = seccomp_arch_to_string(c);
+                log_info("seccomp-arch: %s → 0x%"PRIx32" → %s", n, c, n2);
+                assert_se(streq_ptr(n, n2));
+        }
+}
+
+TEST(syscall_filter_set_find) {
+        assert_se(!syscall_filter_set_find(NULL));
+        assert_se(!syscall_filter_set_find(""));
+        assert_se(!syscall_filter_set_find("quux"));
+        assert_se(!syscall_filter_set_find("@quux"));
+
+        assert_se(syscall_filter_set_find("@clock") == syscall_filter_sets + SYSCALL_FILTER_SET_CLOCK);
+        assert_se(syscall_filter_set_find("@default") == syscall_filter_sets + SYSCALL_FILTER_SET_DEFAULT);
+        assert_se(syscall_filter_set_find("@raw-io") == syscall_filter_sets + SYSCALL_FILTER_SET_RAW_IO);
+}
+
+TEST(filter_sets) {
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        for (unsigned i = 0; i < _SYSCALL_FILTER_SET_MAX; i++) {
+                pid_t pid;
+
+#if HAVE_VALGRIND_VALGRIND_H
+                if (RUNNING_ON_VALGRIND && IN_SET(i, SYSCALL_FILTER_SET_DEFAULT, SYSCALL_FILTER_SET_BASIC_IO, SYSCALL_FILTER_SET_SIGNAL)) {
+                        /* valgrind at least requires rt_sigprocmask(), read(), write(). */
+                        log_info("Running on valgrind, skipping %s", syscall_filter_sets[i].name);
+                        continue;
+                }
+#endif
+#if HAS_FEATURE_ADDRESS_SANITIZER
+                if (IN_SET(i, SYSCALL_FILTER_SET_DEFAULT, SYSCALL_FILTER_SET_BASIC_IO, SYSCALL_FILTER_SET_SIGNAL)) {
+                        /* ASAN at least requires sigaltstack(), read(), write(). */
+                        log_info("Running on address sanitizer, skipping %s", syscall_filter_sets[i].name);
+                        continue;
+                }
+#endif
+
+                log_info("Testing %s", syscall_filter_sets[i].name);
+
+                pid = fork();
+                assert_se(pid >= 0);
+
+                if (pid == 0) { /* Child? */
+                        int fd, r;
+
+                        /* If we look at the default set (or one that includes it), allow-list instead of deny-list */
+                        if (IN_SET(i, SYSCALL_FILTER_SET_DEFAULT,
+                                      SYSCALL_FILTER_SET_SYSTEM_SERVICE,
+                                      SYSCALL_FILTER_SET_KNOWN))
+                                r = seccomp_load_syscall_filter_set(SCMP_ACT_ERRNO(EUCLEAN), syscall_filter_sets + i, SCMP_ACT_ALLOW, true);
+                        else
+                                r = seccomp_load_syscall_filter_set(SCMP_ACT_ALLOW, syscall_filter_sets + i, SCMP_ACT_ERRNO(EUCLEAN), true);
+                        if (r < 0)
+                                _exit(EXIT_FAILURE);
+
+                        /* Test the sycall filter with one random system call */
+                        fd = eventfd(0, EFD_NONBLOCK|EFD_CLOEXEC);
+                        if (IN_SET(i, SYSCALL_FILTER_SET_IO_EVENT, SYSCALL_FILTER_SET_DEFAULT))
+                                assert_se(fd < 0 && errno == EUCLEAN);
+                        else {
+                                assert_se(fd >= 0);
+                                safe_close(fd);
+                        }
+
+                        _exit(EXIT_SUCCESS);
+                }
+
+                assert_se(wait_for_terminate_and_check(syscall_filter_sets[i].name, pid, WAIT_LOG) == EXIT_SUCCESS);
+        }
+}
+
+TEST(filter_sets_ordered) {
+        /* Ensure "@default" always remains at the beginning of the list */
+        assert_se(SYSCALL_FILTER_SET_DEFAULT == 0);
+        assert_se(streq(syscall_filter_sets[0].name, "@default"));
+
+        /* Ensure "@known" always remains at the end of the list */
+        assert_se(SYSCALL_FILTER_SET_KNOWN == _SYSCALL_FILTER_SET_MAX - 1);
+        assert_se(streq(syscall_filter_sets[SYSCALL_FILTER_SET_KNOWN].name, "@known"));
+
+        for (size_t i = 0; i < _SYSCALL_FILTER_SET_MAX; i++) {
+                const char *p = NULL;
+
+                /* Make sure each group has a description */
+                assert_se(!isempty(syscall_filter_sets[0].help));
+
+                /* Make sure the groups are ordered alphabetically, except for the first and last entries */
+                assert_se(i < 2 || i == _SYSCALL_FILTER_SET_MAX - 1 ||
+                          strcmp(syscall_filter_sets[i-1].name, syscall_filter_sets[i].name) < 0);
+
+                NULSTR_FOREACH(k, syscall_filter_sets[i].value) {
+
+                        /* Ensure each syscall list is in itself ordered, but groups before names */
+                        assert_se(!p ||
+                                  (*p == '@' && *k != '@') ||
+                                  (((*p == '@' && *k == '@') ||
+                                    (*p != '@' && *k != '@')) &&
+                                   strcmp(p, k) < 0));
+
+                        p = k;
+                }
+        }
+}
+
+TEST(restrict_namespace) {
+        char *s = NULL;
+        unsigned long ul;
+        pid_t pid;
+
+        if (!have_namespaces()) {
+                log_notice("Testing without namespaces, skipping %s", __func__);
+                return;
+        }
+
+        assert_se(namespace_flags_to_string(0, &s) == 0 && isempty(s));
+        s = mfree(s);
+        assert_se(namespace_flags_to_string(CLONE_NEWNS, &s) == 0 && streq(s, "mnt"));
+        s = mfree(s);
+        assert_se(namespace_flags_to_string(CLONE_NEWNS|CLONE_NEWIPC, &s) == 0 && streq(s, "ipc mnt"));
+        s = mfree(s);
+        assert_se(namespace_flags_to_string(CLONE_NEWCGROUP, &s) == 0 && streq(s, "cgroup"));
+        s = mfree(s);
+
+        assert_se(namespace_flags_from_string("mnt", &ul) == 0 && ul == CLONE_NEWNS);
+        assert_se(namespace_flags_from_string(NULL, &ul) == 0 && ul == 0);
+        assert_se(namespace_flags_from_string("", &ul) == 0 && ul == 0);
+        assert_se(namespace_flags_from_string("uts", &ul) == 0 && ul == CLONE_NEWUTS);
+        assert_se(namespace_flags_from_string("mnt uts ipc", &ul) == 0 && ul == (CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC));
+
+        assert_se(namespace_flags_to_string(CLONE_NEWUTS, &s) == 0 && streq(s, "uts"));
+        assert_se(namespace_flags_from_string(s, &ul) == 0 && ul == CLONE_NEWUTS);
+        s = mfree(s);
+        assert_se(namespace_flags_from_string("ipc", &ul) == 0 && ul == CLONE_NEWIPC);
+        assert_se(namespace_flags_to_string(ul, &s) == 0 && streq(s, "ipc"));
+        s = mfree(s);
+
+        assert_se(namespace_flags_to_string(NAMESPACE_FLAGS_ALL, &s) == 0);
+        assert_se(streq(s, "cgroup ipc net mnt pid user uts"));
+        assert_se(namespace_flags_from_string(s, &ul) == 0 && ul == NAMESPACE_FLAGS_ALL);
+        s = mfree(s);
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping remaining tests in %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping remaining tests in %s", __func__);
+                return;
+        }
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+
+                assert_se(seccomp_restrict_namespaces(CLONE_NEWNS|CLONE_NEWNET) >= 0);
+
+                assert_se(unshare(CLONE_NEWNS) == 0);
+                assert_se(unshare(CLONE_NEWNET) == 0);
+                assert_se(unshare(CLONE_NEWUTS) == -1);
+                assert_se(errno == EPERM);
+                assert_se(unshare(CLONE_NEWIPC) == -1);
+                assert_se(errno == EPERM);
+                assert_se(unshare(CLONE_NEWNET|CLONE_NEWUTS) == -1);
+                assert_se(errno == EPERM);
+
+                /* We use fd 0 (stdin) here, which of course will fail with EINVAL on setns(). Except of course our
+                 * seccomp filter worked, and hits first and makes it return EPERM */
+                assert_se(setns(0, CLONE_NEWNS) == -1);
+                assert_se(errno == EINVAL);
+                assert_se(setns(0, CLONE_NEWNET) == -1);
+                assert_se(errno == EINVAL);
+                assert_se(setns(0, CLONE_NEWUTS) == -1);
+                assert_se(errno == EPERM);
+                assert_se(setns(0, CLONE_NEWIPC) == -1);
+                assert_se(errno == EPERM);
+                assert_se(setns(0, CLONE_NEWNET|CLONE_NEWUTS) == -1);
+                assert_se(errno == EPERM);
+                assert_se(setns(0, 0) == -1);
+                assert_se(errno == EPERM);
+
+                pid = raw_clone(CLONE_NEWNS);
+                assert_se(pid >= 0);
+                if (pid == 0)
+                        _exit(EXIT_SUCCESS);
+                pid = raw_clone(CLONE_NEWNET);
+                assert_se(pid >= 0);
+                if (pid == 0)
+                        _exit(EXIT_SUCCESS);
+                pid = raw_clone(CLONE_NEWUTS);
+                assert_se(pid < 0);
+                assert_se(errno == EPERM);
+                pid = raw_clone(CLONE_NEWIPC);
+                assert_se(pid < 0);
+                assert_se(errno == EPERM);
+                pid = raw_clone(CLONE_NEWNET|CLONE_NEWUTS);
+                assert_se(pid < 0);
+                assert_se(errno == EPERM);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("nsseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(protect_sysctl) {
+        pid_t pid;
+        _cleanup_free_ char *seccomp = NULL;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        /* in containers _sysctl() is likely missing anyway */
+        if (detect_container() > 0) {
+                log_notice("Testing in container, skipping %s", __func__);
+                return;
+        }
+
+        assert_se(get_proc_field("/proc/self/status", "Seccomp", WHITESPACE, &seccomp) == 0);
+        if (!streq(seccomp, "0"))
+                log_warning("Warning: seccomp filter detected, results may be unreliable for %s", __func__);
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+#if defined __NR__sysctl && __NR__sysctl >= 0
+                assert_se(syscall(__NR__sysctl, NULL) < 0);
+                assert_se(IN_SET(errno, EFAULT, ENOSYS));
+#endif
+
+                assert_se(seccomp_protect_sysctl() >= 0);
+
+#if HAVE_VALGRIND_VALGRIND_H
+                if (RUNNING_ON_VALGRIND) {
+                        log_info("Running on valgrind, skipping syscall/EPERM test");
+                        _exit(EXIT_SUCCESS);
+                }
+#endif
+
+#if defined __NR__sysctl && __NR__sysctl >= 0
+                assert_se(syscall(__NR__sysctl, 0, 0, 0) < 0);
+                assert_se(errno == EPERM);
+#endif
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("sysctlseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(protect_syslog) {
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        /* in containers syslog() is likely missing anyway */
+        if (detect_container() > 0) {
+                log_notice("Testing in container, skipping %s", __func__);
+                return;
+        }
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+#if defined __NR_syslog && __NR_syslog >= 0
+                assert_se(syscall(__NR_syslog, -1, NULL, 0) < 0);
+                assert_se(errno == EINVAL);
+#endif
+
+                assert_se(seccomp_protect_syslog() >= 0);
+
+#if defined __NR_syslog && __NR_syslog >= 0
+                assert_se(syscall(__NR_syslog, 0, 0, 0) < 0);
+                assert_se(errno == EPERM);
+#endif
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("syslogseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(restrict_address_families) {
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                int fd;
+                Set *s;
+
+                fd = socket(AF_INET, SOCK_DGRAM, 0);
+                assert_se(fd >= 0);
+                safe_close(fd);
+
+                fd = socket(AF_UNIX, SOCK_DGRAM, 0);
+                assert_se(fd >= 0);
+                safe_close(fd);
+
+                fd = socket(AF_NETLINK, SOCK_DGRAM, 0);
+                assert_se(fd >= 0);
+                safe_close(fd);
+
+                assert_se(s = set_new(NULL));
+                assert_se(set_put(s, INT_TO_PTR(AF_UNIX)) >= 0);
+
+                assert_se(seccomp_restrict_address_families(s, false) >= 0);
+
+                fd = socket(AF_INET, SOCK_DGRAM, 0);
+                assert_se(fd >= 0);
+                safe_close(fd);
+
+                fd = socket(AF_UNIX, SOCK_DGRAM, 0);
+#if SECCOMP_RESTRICT_ADDRESS_FAMILIES_BROKEN
+                assert_se(fd >= 0);
+                safe_close(fd);
+#else
+                assert_se(fd < 0);
+                assert_se(errno == EAFNOSUPPORT);
+#endif
+
+                fd = socket(AF_NETLINK, SOCK_DGRAM, 0);
+                assert_se(fd >= 0);
+                safe_close(fd);
+
+                set_clear(s);
+
+                assert_se(set_put(s, INT_TO_PTR(AF_INET)) >= 0);
+
+                assert_se(seccomp_restrict_address_families(s, true) >= 0);
+
+                fd = socket(AF_INET, SOCK_DGRAM, 0);
+                assert_se(fd >= 0);
+                safe_close(fd);
+
+                fd = socket(AF_UNIX, SOCK_DGRAM, 0);
+#if SECCOMP_RESTRICT_ADDRESS_FAMILIES_BROKEN
+                assert_se(fd >= 0);
+                safe_close(fd);
+#else
+                assert_se(fd < 0);
+                assert_se(errno == EAFNOSUPPORT);
+#endif
+
+                fd = socket(AF_NETLINK, SOCK_DGRAM, 0);
+#if SECCOMP_RESTRICT_ADDRESS_FAMILIES_BROKEN
+                assert_se(fd >= 0);
+                safe_close(fd);
+#else
+                assert_se(fd < 0);
+                assert_se(errno == EAFNOSUPPORT);
+#endif
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("socketseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(restrict_realtime) {
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        /* in containers RT privs are likely missing anyway */
+        if (detect_container() > 0) {
+                log_notice("Testing in container, skipping %s", __func__);
+                return;
+        }
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                /* On some CI environments, the restriction may be already enabled. */
+                if (sched_setscheduler(0, SCHED_FIFO, &(struct sched_param) { .sched_priority = 1 }) < 0) {
+                        log_full_errno(errno == EPERM ? LOG_DEBUG : LOG_WARNING, errno,
+                                       "Failed to set scheduler parameter for FIFO: %m");
+                        assert(errno == EPERM);
+                }
+                if (sched_setscheduler(0, SCHED_RR, &(struct sched_param) { .sched_priority = 1 }) < 0) {
+                        log_full_errno(errno == EPERM ? LOG_DEBUG : LOG_WARNING, errno,
+                                       "Failed to set scheduler parameter for RR: %m");
+                        assert(errno == EPERM);
+                }
+
+                assert_se(sched_setscheduler(0, SCHED_IDLE, &(struct sched_param) { .sched_priority = 0 }) >= 0);
+                assert_se(sched_setscheduler(0, SCHED_BATCH, &(struct sched_param) { .sched_priority = 0 }) >= 0);
+                assert_se(sched_setscheduler(0, SCHED_OTHER, &(struct sched_param) {}) >= 0);
+
+                assert_se(seccomp_restrict_realtime_full(ENOANO) >= 0);
+
+                assert_se(sched_setscheduler(0, SCHED_IDLE, &(struct sched_param) { .sched_priority = 0 }) >= 0);
+                assert_se(sched_setscheduler(0, SCHED_BATCH, &(struct sched_param) { .sched_priority = 0 }) >= 0);
+                assert_se(sched_setscheduler(0, SCHED_OTHER, &(struct sched_param) {}) >= 0);
+
+                assert_se(sched_setscheduler(0, SCHED_FIFO, &(struct sched_param) { .sched_priority = 1 }) < 0);
+                assert_se(errno == ENOANO);
+                assert_se(sched_setscheduler(0, SCHED_RR, &(struct sched_param) { .sched_priority = 1 }) < 0);
+                assert_se(errno == ENOANO);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("realtimeseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(memory_deny_write_execute_mmap) {
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+#if HAVE_VALGRIND_VALGRIND_H
+        if (RUNNING_ON_VALGRIND) {
+                log_notice("Running on valgrind, skipping %s", __func__);
+                return;
+        }
+#endif
+#if HAS_FEATURE_ADDRESS_SANITIZER
+        log_notice("Running on address sanitizer, skipping %s", __func__);
+        return;
+#endif
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                void *p;
+
+                p = mmap(NULL, page_size(), PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1,0);
+                assert_se(p != MAP_FAILED);
+                assert_se(munmap(p, page_size()) >= 0);
+
+                p = mmap(NULL, page_size(), PROT_WRITE|PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1,0);
+                assert_se(p != MAP_FAILED);
+                assert_se(munmap(p, page_size()) >= 0);
+
+                assert_se(seccomp_memory_deny_write_execute() >= 0);
+
+                p = mmap(NULL, page_size(), PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1,0);
+#if defined(__x86_64__) || defined(__i386__) || defined(__powerpc64__) || defined(__arm__) || defined(__aarch64__) || defined(__loongarch_lp64)
+                assert_se(p == MAP_FAILED);
+                assert_se(errno == EPERM);
+#endif
+                /* Depending on kernel, libseccomp, and glibc versions, other architectures
+                 * might fail or not. Let's not assert success. */
+                if (p != MAP_FAILED)
+                        assert_se(munmap(p, page_size()) == 0);
+
+                p = mmap(NULL, page_size(), PROT_WRITE|PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1,0);
+                assert_se(p != MAP_FAILED);
+                assert_se(munmap(p, page_size()) >= 0);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("memoryseccomp-mmap", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(memory_deny_write_execute_shmat) {
+        int shmid;
+        pid_t pid;
+        uint32_t arch;
+
+        SECCOMP_FOREACH_LOCAL_ARCH(arch) {
+                log_debug("arch %s: SCMP_SYS(mmap) = %d", seccomp_arch_to_string(arch), SCMP_SYS(mmap));
+                log_debug("arch %s: SCMP_SYS(mmap2) = %d", seccomp_arch_to_string(arch), SCMP_SYS(mmap2));
+                log_debug("arch %s: SCMP_SYS(shmget) = %d", seccomp_arch_to_string(arch), SCMP_SYS(shmget));
+                log_debug("arch %s: SCMP_SYS(shmat) = %d", seccomp_arch_to_string(arch), SCMP_SYS(shmat));
+                log_debug("arch %s: SCMP_SYS(shmdt) = %d", seccomp_arch_to_string(arch), SCMP_SYS(shmdt));
+        }
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs() || have_effective_cap(CAP_IPC_OWNER) <= 0) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+#if HAVE_VALGRIND_VALGRIND_H
+        if (RUNNING_ON_VALGRIND) {
+                log_notice("Running on valgrind, skipping %s", __func__);
+                return;
+        }
+#endif
+#if HAS_FEATURE_ADDRESS_SANITIZER
+        log_notice("Running on address sanitizer, skipping %s", __func__);
+        return;
+#endif
+
+        shmid = shmget(IPC_PRIVATE, page_size(), 0);
+        assert_se(shmid >= 0);
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                void *p;
+
+                p = shmat(shmid, NULL, 0);
+                assert_se(p != MAP_FAILED);
+                assert_se(shmdt(p) == 0);
+
+                p = shmat(shmid, NULL, SHM_EXEC);
+                assert_se(p != MAP_FAILED);
+                assert_se(shmdt(p) == 0);
+
+                assert_se(seccomp_memory_deny_write_execute() >= 0);
+
+                p = shmat(shmid, NULL, SHM_EXEC);
+                log_debug_errno(p == MAP_FAILED ? errno : 0, "shmat(SHM_EXEC): %m");
+#if defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) || defined(__loongarch_lp64)
+                assert_se(p == MAP_FAILED);
+                assert_se(errno == EPERM);
+#endif
+                /* Depending on kernel, libseccomp, and glibc versions, other architectures
+                 * might fail or not. Let's not assert success. */
+                if (p != MAP_FAILED)
+                        assert_se(shmdt(p) == 0);
+
+                p = shmat(shmid, NULL, 0);
+                log_debug_errno(p == MAP_FAILED ? errno : 0, "shmat(0): %m");
+                assert_se(p != MAP_FAILED);
+                assert_se(shmdt(p) == 0);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("memoryseccomp-shmat", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(restrict_archs) {
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                _cleanup_set_free_ Set *s = NULL;
+
+                assert_se(access("/", F_OK) >= 0);
+
+                assert_se(s = set_new(NULL));
+
+#ifdef __x86_64__
+                assert_se(set_put(s, UINT32_TO_PTR(SCMP_ARCH_X86+1)) >= 0);
+#endif
+                assert_se(seccomp_restrict_archs(s) >= 0);
+
+                assert_se(access("/", F_OK) >= 0);
+                assert_se(seccomp_restrict_archs(NULL) >= 0);
+
+                assert_se(access("/", F_OK) >= 0);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("archseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(load_syscall_filter_set_raw) {
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                _cleanup_hashmap_free_ Hashmap *s = NULL;
+
+                assert_se(access("/", F_OK) >= 0);
+                assert_se(poll(NULL, 0, 0) == 0);
+
+                assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, NULL, scmp_act_kill_process(), true) >= 0);
+                assert_se(access("/", F_OK) >= 0);
+                assert_se(poll(NULL, 0, 0) == 0);
+
+                assert_se(s = hashmap_new(NULL));
+#if defined __NR_access && __NR_access >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_access + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has access()");
+#endif
+#if defined __NR_faccessat && __NR_faccessat >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_faccessat + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has faccessat()");
+#endif
+#if defined __NR_faccessat2 && __NR_faccessat2 >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_faccessat2 + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has faccessat2()");
+#endif
+
+                assert_se(!hashmap_isempty(s));
+                assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, s, SCMP_ACT_ERRNO(EUCLEAN), true) >= 0);
+
+                assert_se(access("/", F_OK) < 0);
+                assert_se(errno == EUCLEAN);
+
+                assert_se(poll(NULL, 0, 0) == 0);
+
+                hashmap_clear(s);
+#if defined __NR_access && __NR_access >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_access + 1), INT_TO_PTR(EILSEQ)) >= 0);
+#endif
+#if defined __NR_faccessat && __NR_faccessat >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_faccessat + 1), INT_TO_PTR(EILSEQ)) >= 0);
+#endif
+#if defined __NR_faccessat2 && __NR_faccessat2 >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_faccessat2 + 1), INT_TO_PTR(EILSEQ)) >= 0);
+#endif
+
+                assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, s, SCMP_ACT_ERRNO(EUCLEAN), true) >= 0);
+
+                assert_se(access("/", F_OK) < 0);
+                assert_se(errno == EILSEQ);
+
+                assert_se(poll(NULL, 0, 0) == 0);
+
+                hashmap_clear(s);
+#if defined __NR_poll && __NR_poll >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_poll + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has poll()");
+#endif
+#if defined __NR_ppoll && __NR_ppoll >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_ppoll + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has ppoll()");
+#endif
+#if defined __NR_ppoll_time64 && __NR_ppoll_time64 >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_ppoll_time64 + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has ppoll_time64()");
+#endif
+
+                assert_se(!hashmap_isempty(s));
+                assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, s, SCMP_ACT_ERRNO(EUNATCH), true) >= 0);
+
+                assert_se(access("/", F_OK) < 0);
+                assert_se(errno == EILSEQ);
+
+                assert_se(poll(NULL, 0, 0) < 0);
+                assert_se(errno == EUNATCH);
+
+                hashmap_clear(s);
+#if defined __NR_poll && __NR_poll >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_poll + 1), INT_TO_PTR(EILSEQ)) >= 0);
+#endif
+#if defined __NR_ppoll && __NR_ppoll >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_ppoll + 1), INT_TO_PTR(EILSEQ)) >= 0);
+#endif
+#if defined __NR_ppoll_time64 && __NR_ppoll_time64 >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_ppoll_time64 + 1), INT_TO_PTR(EILSEQ)) >= 0);
+#endif
+
+                assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, s, SCMP_ACT_ERRNO(EUNATCH), true) >= 0);
+
+                assert_se(access("/", F_OK) < 0);
+                assert_se(errno == EILSEQ);
+
+                assert_se(poll(NULL, 0, 0) < 0);
+                assert_se(errno == EILSEQ);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("syscallrawseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(native_syscalls_filtered) {
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                _cleanup_set_free_ Set *arch_s = NULL;
+                _cleanup_hashmap_free_ Hashmap *s = NULL;
+
+                /* Passing "native" or an empty set is equivalent, just do both here. */
+                assert_se(arch_s = set_new(NULL));
+                assert_se(seccomp_restrict_archs(arch_s) >= 0);
+                assert_se(set_put(arch_s, SCMP_ARCH_NATIVE) >= 0);
+                assert_se(seccomp_restrict_archs(arch_s) >= 0);
+
+                assert_se(access("/", F_OK) >= 0);
+                assert_se(poll(NULL, 0, 0) == 0);
+
+                assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, NULL, scmp_act_kill_process(), true) >= 0);
+                assert_se(access("/", F_OK) >= 0);
+                assert_se(poll(NULL, 0, 0) == 0);
+
+                assert_se(s = hashmap_new(NULL));
+#if defined __NR_access && __NR_access >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_access + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has access()");
+#endif
+#if defined __NR_faccessat && __NR_faccessat >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_faccessat + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has faccessat()");
+#endif
+#if defined __NR_faccessat2 && __NR_faccessat2 >= 0
+                assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_faccessat2 + 1), INT_TO_PTR(-1)) >= 0);
+                log_debug("has faccessat2()");
+#endif
+
+                assert_se(!hashmap_isempty(s));
+                assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, s, SCMP_ACT_ERRNO(EUCLEAN), true) >= 0);
+
+                assert_se(access("/", F_OK) < 0);
+                assert_se(errno == EUCLEAN);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("nativeseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+TEST(lock_personality) {
+        unsigned long current;
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        assert_se(opinionated_personality(&current) >= 0);
+        /* On ppc64le sanitizers disable ASLR (i.e. by setting ADDR_NO_RANDOMIZE),
+         * which opinionated_personality() doesn't return. Let's tweak the current
+         * personality ourselves in such cases.
+         * See: https://github.com/llvm/llvm-project/commit/78f7a6eaa601bfdd6ae70ffd3da2254c21ff77f9
+         */
+        if (FLAGS_SET(safe_personality(PERSONALITY_INVALID), ADDR_NO_RANDOMIZE))
+                current |= ADDR_NO_RANDOMIZE;
+
+        log_info("current personality=0x%lX", current);
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                assert_se(seccomp_lock_personality(current) >= 0);
+
+                assert_se((unsigned long) safe_personality(current) == current);
+
+                /* Note, we also test that safe_personality() works correctly, by checking whether errno is properly
+                 * set, in addition to the return value */
+                errno = 0;
+                assert_se(safe_personality(PER_LINUX | MMAP_PAGE_ZERO) == -EPERM);
+                assert_se(errno == EPERM);
+
+                if (!FLAGS_SET(current, ADDR_NO_RANDOMIZE))
+                        assert_se(safe_personality(PER_LINUX | ADDR_NO_RANDOMIZE) == -EPERM);
+                assert_se(safe_personality(PER_LINUX | ADDR_COMPAT_LAYOUT) == -EPERM);
+                assert_se(safe_personality(PER_LINUX | READ_IMPLIES_EXEC) == -EPERM);
+                assert_se(safe_personality(PER_LINUX_32BIT) == -EPERM);
+                assert_se(safe_personality(PER_SVR4) == -EPERM);
+                assert_se(safe_personality(PER_BSD) == -EPERM);
+                assert_se(safe_personality(current == PER_LINUX ? PER_LINUX32 : PER_LINUX) == -EPERM);
+                assert_se(safe_personality(PER_LINUX32_3GB) == -EPERM);
+                assert_se(safe_personality(PER_UW7) == -EPERM);
+                assert_se(safe_personality(0x42) == -EPERM);
+
+                assert_se(safe_personality(PERSONALITY_INVALID) == -EPERM); /* maybe remove this later */
+
+                assert_se((unsigned long) personality(current) == current);
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("lockpersonalityseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+static int real_open(const char *path, int flags, mode_t mode) {
+        /* glibc internally calls openat() when open() is requested. Let's hence define our own wrapper for
+         * testing purposes that calls the real syscall, on architectures where SYS_open is defined. On
+         * other architectures, let's just fall back to the glibc call. */
+
+#if defined __NR_open && __NR_open >= 0
+        return (int) syscall(__NR_open, path, flags, mode);
+#else
+        return open(path, flags, mode);
+#endif
+}
+
+static int try_fchmodat2(int dirfd, const char *path, mode_t mode, int flags) {
+        int r;
+
+        /* glibc does not provide a direct wrapper for fchmodat2(). Let's hence define our own wrapper for
+         * testing purposes that calls the real syscall, on architectures and in environments where
+         * SYS_fchmodat2 is defined. Otherwise, let's just fall back to the glibc fchmodat() call. */
+
+        /* Not supported by fchmodat() */
+        assert_se(!FLAGS_SET(flags, AT_EMPTY_PATH));
+
+        r = RET_NERRNO(fchmodat2(dirfd, path, mode, flags));
+        if (r != -ENOSYS)
+                return r;
+
+        /* The syscall might still be unsupported by kernel or libseccomp. */
+        return RET_NERRNO(fchmodat(dirfd, path, mode, flags));
+}
+
+TEST(restrict_suid_sgid) {
+        pid_t pid;
+
+        if (!is_seccomp_available()) {
+                log_notice("Seccomp not available, skipping %s", __func__);
+                return;
+        }
+        if (!have_seccomp_privs()) {
+                log_notice("Not privileged, skipping %s", __func__);
+                return;
+        }
+
+        pid = fork();
+        assert_se(pid >= 0);
+
+        if (pid == 0) {
+                char path[] = "/tmp/suidsgidXXXXXX", dir[] = "/tmp/suidsgiddirXXXXXX";
+                int fd = -EBADF, k = -EBADF;
+                const char *z;
+
+                fd = mkostemp_safe(path);
+                assert_se(fd >= 0);
+
+                assert_se(mkdtemp(dir));
+                z = strjoina(dir, "/test");
+
+                assert_se(chmod(path, 0755 | S_ISUID) >= 0);
+                assert_se(chmod(path, 0755 | S_ISGID) >= 0);
+                assert_se(chmod(path, 0755 | S_ISGID | S_ISUID) >= 0);
+                assert_se(chmod(path, 0755) >= 0);
+
+                assert_se(fchmod(fd, 0755 | S_ISUID) >= 0);
+                assert_se(fchmod(fd, 0755 | S_ISGID) >= 0);
+                assert_se(fchmod(fd, 0755 | S_ISGID | S_ISUID) >= 0);
+                assert_se(fchmod(fd, 0755) >= 0);
+
+                assert_se(fchmodat(AT_FDCWD, path, 0755 | S_ISUID, 0) >= 0);
+                assert_se(fchmodat(AT_FDCWD, path, 0755 | S_ISGID, 0) >= 0);
+                assert_se(fchmodat(AT_FDCWD, path, 0755 | S_ISGID | S_ISUID, 0) >= 0);
+                assert_se(fchmodat(AT_FDCWD, path, 0755, 0) >= 0);
+
+                assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISUID, 0) >= 0);
+                assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISGID, 0) >= 0);
+                assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISGID | S_ISUID, 0) >= 0);
+                assert_se(try_fchmodat2(AT_FDCWD, path, 0755, 0) >= 0);
+
+                k = real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISGID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID | S_ISGID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = creat(z, 0644 | S_ISUID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = creat(z, 0644 | S_ISGID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = creat(z, 0644 | S_ISUID | S_ISGID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = creat(z, 0644);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = openat(AT_FDCWD, z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = openat(AT_FDCWD, z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISGID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = openat(AT_FDCWD, z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID | S_ISGID);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                k = openat(AT_FDCWD, z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                assert_se(mkdir(z, 0755 | S_ISUID) >= 0);
+                assert_se(rmdir(z) >= 0);
+                assert_se(mkdir(z, 0755 | S_ISGID) >= 0);
+                assert_se(rmdir(z) >= 0);
+                assert_se(mkdir(z, 0755 | S_ISUID | S_ISGID) >= 0);
+                assert_se(rmdir(z) >= 0);
+                assert_se(mkdir(z, 0755) >= 0);
+                assert_se(rmdir(z) >= 0);
+
+                assert_se(mkdirat(AT_FDCWD, z, 0755 | S_ISUID) >= 0);
+                assert_se(rmdir(z) >= 0);
+                assert_se(mkdirat(AT_FDCWD, z, 0755 | S_ISGID) >= 0);
+                assert_se(rmdir(z) >= 0);
+                assert_se(mkdirat(AT_FDCWD, z, 0755 | S_ISUID | S_ISGID) >= 0);
+                assert_se(rmdir(z) >= 0);
+                assert_se(mkdirat(AT_FDCWD, z, 0755) >= 0);
+                assert_se(rmdir(z) >= 0);
+
+                assert_se(mknod(z, S_IFREG | 0755 | S_ISUID, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+                assert_se(mknod(z, S_IFREG | 0755 | S_ISGID, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+                assert_se(mknod(z, S_IFREG | 0755 | S_ISUID | S_ISGID, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+                assert_se(mknod(z, S_IFREG | 0755, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+
+                assert_se(mknodat(AT_FDCWD, z, S_IFREG | 0755 | S_ISUID, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+                assert_se(mknodat(AT_FDCWD, z, S_IFREG | 0755 | S_ISGID, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+                assert_se(mknodat(AT_FDCWD, z, S_IFREG | 0755 | S_ISUID | S_ISGID, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+                assert_se(mknodat(AT_FDCWD, z, S_IFREG | 0755, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+
+                assert_se(seccomp_restrict_suid_sgid() >= 0);
+
+                assert_se(chmod(path, 0775 | S_ISUID) < 0 && errno == EPERM);
+                assert_se(chmod(path, 0775 | S_ISGID) < 0  && errno == EPERM);
+                assert_se(chmod(path, 0775 | S_ISGID | S_ISUID) < 0  && errno == EPERM);
+                assert_se(chmod(path, 0775) >= 0);
+
+                assert_se(fchmod(fd, 0775 | S_ISUID) < 0 && errno == EPERM);
+                assert_se(fchmod(fd, 0775 | S_ISGID) < 0  && errno == EPERM);
+                assert_se(fchmod(fd, 0775 | S_ISGID | S_ISUID) < 0  && errno == EPERM);
+                assert_se(fchmod(fd, 0775) >= 0);
+
+                assert_se(fchmodat(AT_FDCWD, path, 0755 | S_ISUID, 0) < 0 && errno == EPERM);
+                assert_se(fchmodat(AT_FDCWD, path, 0755 | S_ISGID, 0) < 0 && errno == EPERM);
+                assert_se(fchmodat(AT_FDCWD, path, 0755 | S_ISGID | S_ISUID, 0) < 0 && errno == EPERM);
+                assert_se(fchmodat(AT_FDCWD, path, 0755, 0) >= 0);
+
+                assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISUID, 0) < 0 && errno == EPERM);
+                assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISGID, 0) < 0 && errno == EPERM);
+                assert_se(try_fchmodat2(AT_FDCWD, path, 0755 | S_ISGID | S_ISUID, 0) < 0 && errno == EPERM);
+                assert_se(try_fchmodat2(AT_FDCWD, path, 0755, 0) >= 0);
+
+                assert_se(real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID) < 0 && errno == EPERM);
+                assert_se(real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISGID) < 0 && errno == EPERM);
+                assert_se(real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID | S_ISGID) < 0 && errno == EPERM);
+                k = real_open(z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                assert_se(creat(z, 0644 | S_ISUID) < 0 && errno == EPERM);
+                assert_se(creat(z, 0644 | S_ISGID) < 0 && errno == EPERM);
+                assert_se(creat(z, 0644 | S_ISUID | S_ISGID) < 0 && errno == EPERM);
+                k = creat(z, 0644);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                assert_se(openat(AT_FDCWD, z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID) < 0 && errno == EPERM);
+                assert_se(openat(AT_FDCWD, z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISGID) < 0 && errno == EPERM);
+                assert_se(openat(AT_FDCWD, z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644 | S_ISUID | S_ISGID) < 0 && errno == EPERM);
+                k = openat(AT_FDCWD, z, O_CREAT|O_RDWR|O_CLOEXEC|O_EXCL, 0644);
+                k = safe_close(k);
+                assert_se(unlink(z) >= 0);
+
+                assert_se(mkdir(z, 0755 | S_ISUID) < 0 && errno == EPERM);
+                assert_se(mkdir(z, 0755 | S_ISGID) < 0 && errno == EPERM);
+                assert_se(mkdir(z, 0755 | S_ISUID | S_ISGID) < 0 && errno == EPERM);
+                assert_se(mkdir(z, 0755) >= 0);
+                assert_se(rmdir(z) >= 0);
+
+                assert_se(mkdirat(AT_FDCWD, z, 0755 | S_ISUID) < 0 && errno == EPERM);
+                assert_se(mkdirat(AT_FDCWD, z, 0755 | S_ISGID) < 0 && errno == EPERM);
+                assert_se(mkdirat(AT_FDCWD, z, 0755 | S_ISUID | S_ISGID) < 0 && errno == EPERM);
+                assert_se(mkdirat(AT_FDCWD, z, 0755) >= 0);
+                assert_se(rmdir(z) >= 0);
+
+                assert_se(mknod(z, S_IFREG | 0755 | S_ISUID, 0) < 0 && errno == EPERM);
+                assert_se(mknod(z, S_IFREG | 0755 | S_ISGID, 0) < 0 && errno == EPERM);
+                assert_se(mknod(z, S_IFREG | 0755 | S_ISUID | S_ISGID, 0) < 0 && errno == EPERM);
+                assert_se(mknod(z, S_IFREG | 0755, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+
+                assert_se(mknodat(AT_FDCWD, z, S_IFREG | 0755 | S_ISUID, 0) < 0 && errno == EPERM);
+                assert_se(mknodat(AT_FDCWD, z, S_IFREG | 0755 | S_ISGID, 0) < 0 && errno == EPERM);
+                assert_se(mknodat(AT_FDCWD, z, S_IFREG | 0755 | S_ISUID | S_ISGID, 0) < 0 && errno == EPERM);
+                assert_se(mknodat(AT_FDCWD, z, S_IFREG | 0755, 0) >= 0);
+                assert_se(unlink(z) >= 0);
+
+                assert_se(unlink(path) >= 0);
+                assert_se(rm_rf(dir, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        assert_se(wait_for_terminate_and_check("suidsgidseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
+}
+
+DEFINE_TEST_MAIN(LOG_DEBUG);