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Systemd/src/test/test-seccomp.c
Zbigniew Jędrzejewski-Szmek b54f36c604 seccomp: reduce logging about failure to add syscall to seccomp 
Our logs are full of:
Sep 19 09:22:10 autopkgtest systemd[690]: Failed to add rule for system call oldstat() / -10037, ignoring: Numerical argument out of domain
Sep 19 09:22:10 autopkgtest systemd[690]: Failed to add rule for system call get_thread_area() / -10076, ignoring: Numerical argument out of domain
Sep 19 09:22:10 autopkgtest systemd[690]: Failed to add rule for system call set_thread_area() / -10079, ignoring: Numerical argument out of domain
Sep 19 09:22:10 autopkgtest systemd[690]: Failed to add rule for system call oldfstat() / -10034, ignoring: Numerical argument out of domain
Sep 19 09:22:10 autopkgtest systemd[690]: Failed to add rule for system call oldolduname() / -10036, ignoring: Numerical argument out of domain
Sep 19 09:22:10 autopkgtest systemd[690]: Failed to add rule for system call oldlstat() / -10035, ignoring: Numerical argument out of domain
Sep 19 09:22:10 autopkgtest systemd[690]: Failed to add rule for system call waitpid() / -10073, ignoring: Numerical argument out of domain
...
This is pointless and makes debug logs hard to read. Let's keep the logs
in test code, but disable it in nspawn and pid1. This is done through a function
parameter because those functions operate recursively and it's not possible to
make the caller to log meaningfully.


There should be no functional change, except the skipped debug logs.
2018-09-24 17:21:09 +02:00

764 lines
26 KiB
C
Raw Blame History

/* SPDX-License-Identifier: LGPL-2.1+ */
#include <poll.h>
#include <sched.h>
#include <stdlib.h>
#include <sys/eventfd.h>
#include <sys/mman.h>
#include <sys/personality.h>
#include <sys/shm.h>
#include <sys/types.h>
#include <unistd.h>
#include "alloc-util.h"
#include "fd-util.h"
#include "macro.h"
#include "missing.h"
#include "nsflags.h"
#include "process-util.h"
#include "raw-clone.h"
#include "seccomp-util.h"
#include "set.h"
#include "string-util.h"
#include "tests.h"
#include "util.h"
#include "virt.h"
#if SCMP_SYS(socket) < 0 || defined(__i386__) || defined(__s390x__) || defined(__s390__)
/* 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 void test_seccomp_arch_to_string(void) {
uint32_t a, b;
const char *name;
log_info("/* %s */", __func__);
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);
}
static void test_architecture_table(void) {
const char *n, *n2;
log_info("/* %s */", __func__);
NULSTR_FOREACH(n,
"native\0"
"x86\0"
"x86-64\0"
"x32\0"
"arm\0"
"arm64\0"
"mips\0"
"mips64\0"
"mips64-n32\0"
"mips-le\0"
"mips64-le\0"
"mips64-le-n32\0"
"ppc\0"
"ppc64\0"
"ppc64-le\0"
"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));
}
}
static void test_syscall_filter_set_find(void) {
log_info("/* %s */", __func__);
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);
}
static void test_filter_sets(void) {
unsigned i;
int r;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, skipping %s", __func__);
return;
}
for (i = 0; i < _SYSCALL_FILTER_SET_MAX; i++) {
pid_t pid;
log_info("Testing %s", syscall_filter_sets[i].name);
pid = fork();
assert_se(pid >= 0);
if (pid == 0) { /* Child? */
int fd;
/* If we look at the default set (or one that includes it), whitelist instead of blacklist */
if (IN_SET(i, SYSCALL_FILTER_SET_DEFAULT, SYSCALL_FILTER_SET_SYSTEM_SERVICE))
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);
}
}
static void test_filter_sets_ordered(void) {
size_t i;
log_info("/* %s */", __func__);
/* 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"));
for (i = 0; i < _SYSCALL_FILTER_SET_MAX; i++) {
const char *k, *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 entry */
assert_se(i < 2 || 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;
}
}
}
static void test_restrict_namespace(void) {
char *s = NULL;
unsigned long ul;
pid_t pid;
log_info("/* %s */", __func__);
assert_se(namespace_flags_to_string(0, &s) == 0 && streq(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 (geteuid() != 0) {
log_notice("Not root, 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);
}
static void test_protect_sysctl(void) {
pid_t pid;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, skipping %s", __func__);
return;
}
/* in containers _sysctl() 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 __NR__sysctl > 0
assert_se(syscall(__NR__sysctl, NULL) < 0);
assert_se(errno == EFAULT);
#endif
assert_se(seccomp_protect_sysctl() >= 0);
#if __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);
}
static void test_restrict_address_families(void) {
pid_t pid;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, 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);
}
static void test_restrict_realtime(void) {
pid_t pid;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, 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) {
assert_se(sched_setscheduler(0, SCHED_FIFO, &(struct sched_param) { .sched_priority = 1 }) >= 0);
assert_se(sched_setscheduler(0, SCHED_RR, &(struct sched_param) { .sched_priority = 1 }) >= 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(seccomp_restrict_realtime() >= 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 == EPERM);
assert_se(sched_setscheduler(0, SCHED_RR, &(struct sched_param) { .sched_priority = 1 }) < 0);
assert_se(errno == EPERM);
_exit(EXIT_SUCCESS);
}
assert_se(wait_for_terminate_and_check("realtimeseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
}
static void test_memory_deny_write_execute_mmap(void) {
pid_t pid;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, skipping %s", __func__);
return;
}
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__)
assert_se(p == MAP_FAILED);
assert_se(errno == EPERM);
#else /* unknown architectures */
assert_se(p != MAP_FAILED);
assert_se(munmap(p, page_size()) >= 0);
#endif
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);
}
static void test_memory_deny_write_execute_shmat(void) {
int shmid;
pid_t pid;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, skipping %s", __func__);
return;
}
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);
#if defined(__x86_64__) || defined(__arm__) || defined(__aarch64__)
assert_se(p == MAP_FAILED);
assert_se(errno == EPERM);
#else /* __i386__, __powerpc64__, and "unknown" architectures */
assert_se(p != MAP_FAILED);
assert_se(shmdt(p) == 0);
#endif
p = shmat(shmid, NULL, 0);
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);
}
static void test_restrict_archs(void) {
pid_t pid;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, 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);
}
static void test_load_syscall_filter_set_raw(void) {
pid_t pid;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, 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, true) >= 0);
assert_se(access("/", F_OK) >= 0);
assert_se(poll(NULL, 0, 0) == 0);
assert_se(s = hashmap_new(NULL));
#if SCMP_SYS(access) >= 0
assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_access + 1), INT_TO_PTR(-1)) >= 0);
#else
assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_faccessat + 1), INT_TO_PTR(-1)) >= 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 == EUCLEAN);
assert_se(poll(NULL, 0, 0) == 0);
s = hashmap_free(s);
assert_se(s = hashmap_new(NULL));
#if SCMP_SYS(access) >= 0
assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_access + 1), INT_TO_PTR(EILSEQ)) >= 0);
#else
assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_faccessat + 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);
s = hashmap_free(s);
assert_se(s = hashmap_new(NULL));
#if SCMP_SYS(poll) >= 0
assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_poll + 1), INT_TO_PTR(-1)) >= 0);
#else
assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_ppoll + 1), INT_TO_PTR(-1)) >= 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 == EUNATCH);
s = hashmap_free(s);
assert_se(s = hashmap_new(NULL));
#if SCMP_SYS(poll) >= 0
assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_poll + 1), INT_TO_PTR(EILSEQ)) >= 0);
#else
assert_se(hashmap_put(s, UINT32_TO_PTR(__NR_ppoll + 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);
}
static void test_lock_personality(void) {
unsigned long current;
pid_t pid;
log_info("/* %s */", __func__);
if (!is_seccomp_available()) {
log_notice("Seccomp not available, skipping %s", __func__);
return;
}
if (geteuid() != 0) {
log_notice("Not root, skipping %s", __func__);
return;
}
assert_se(opinionated_personality(&current) >= 0);
log_info("current personality=%lu", 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 checkig whether errno is properly
* set, in addition to the return value */
errno = 0;
assert_se(safe_personality(PER_LINUX | ADDR_NO_RANDOMIZE) == -EPERM);
assert_se(errno == EPERM);
assert_se(safe_personality(PER_LINUX | MMAP_PAGE_ZERO) == -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);
}
int main(int argc, char *argv[]) {
test_setup_logging(LOG_DEBUG);
test_seccomp_arch_to_string();
test_architecture_table();
test_syscall_filter_set_find();
test_filter_sets();
test_filter_sets_ordered();
test_restrict_namespace();
test_protect_sysctl();
test_restrict_address_families();
test_restrict_realtime();
test_memory_deny_write_execute_mmap();
test_memory_deny_write_execute_shmat();
test_restrict_archs();
test_load_syscall_filter_set_raw();
test_lock_personality();
return 0;
}
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