+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2016 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <poll.h>
#include <sched.h>
#include <stdlib.h>
#include <sys/eventfd.h>
#include <sys/mman.h>
-#include <sys/poll.h>
+#include <sys/personality.h>
#include <sys/shm.h>
#include <sys/types.h>
#include <unistd.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;
_exit(EXIT_SUCCESS);
}
- assert_se(wait_for_terminate_and_warn(syscall_filter_sets[i].name, pid, true) == EXIT_SUCCESS);
+ assert_se(wait_for_terminate_and_check(syscall_filter_sets[i].name, pid, WAIT_LOG) == EXIT_SUCCESS);
}
}
assert_se(streq(s, "cgroup ipc net mnt pid user uts"));
assert_se(namespace_flag_from_string_many(s, &ul) == 0 && ul == NAMESPACE_FLAGS_ALL);
-#if SECCOMP_RESTRICT_NAMESPACES_BROKEN == 0
-
if (!is_seccomp_available())
return;
if (geteuid() != 0)
_exit(EXIT_SUCCESS);
}
- assert_se(wait_for_terminate_and_warn("nsseccomp", pid, true) == EXIT_SUCCESS);
-#endif
+ assert_se(wait_for_terminate_and_check("nsseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
}
static void test_protect_sysctl(void) {
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_warn("sysctlseccomp", pid, true) == EXIT_SUCCESS);
+ assert_se(wait_for_terminate_and_check("sysctlseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
}
static void test_restrict_address_families(void) {
_exit(EXIT_SUCCESS);
}
- assert_se(wait_for_terminate_and_warn("socketseccomp", pid, true) == EXIT_SUCCESS);
+ assert_se(wait_for_terminate_and_check("socketseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
}
static void test_restrict_realtime(void) {
_exit(EXIT_SUCCESS);
}
- assert_se(wait_for_terminate_and_warn("realtimeseccomp", pid, true) == EXIT_SUCCESS);
+ assert_se(wait_for_terminate_and_check("realtimeseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
}
static void test_memory_deny_write_execute_mmap(void) {
_exit(EXIT_SUCCESS);
}
- assert_se(wait_for_terminate_and_warn("memoryseccomp-mmap", pid, true) == 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) {
_exit(EXIT_SUCCESS);
}
- assert_se(wait_for_terminate_and_warn("memoryseccomp-shmat", pid, true) == EXIT_SUCCESS);
+ assert_se(wait_for_terminate_and_check("memoryseccomp-shmat", pid, WAIT_LOG) == EXIT_SUCCESS);
}
static void test_restrict_archs(void) {
_exit(EXIT_SUCCESS);
}
- assert_se(wait_for_terminate_and_warn("archseccomp", pid, true) == EXIT_SUCCESS);
+ assert_se(wait_for_terminate_and_check("archseccomp", pid, WAIT_LOG) == EXIT_SUCCESS);
}
static void test_load_syscall_filter_set_raw(void) {
assert_se(pid >= 0);
if (pid == 0) {
- _cleanup_set_free_ Set *s = NULL;
+ _cleanup_hashmap_free_ Hashmap *s = NULL;
assert_se(access("/", F_OK) >= 0);
assert_se(poll(NULL, 0, 0) == 0);
assert_se(access("/", F_OK) >= 0);
assert_se(poll(NULL, 0, 0) == 0);
- assert_se(s = set_new(NULL));
- assert_se(set_put(s, UINT32_TO_PTR(__NR_access + 1)) >= 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)) >= 0);
assert_se(poll(NULL, 0, 0) == 0);
- s = set_free(s);
+ s = hashmap_free(s);
- assert_se(s = set_new(NULL));
- assert_se(set_put(s, UINT32_TO_PTR(__NR_poll + 1)) >= 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(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)) >= 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)) >= 0);
assert_se(access("/", F_OK) < 0);
- assert_se(errno == EUCLEAN);
+ 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)) >= 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_warn("syscallrawseccomp", pid, true) == 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;
+
+ if (!is_seccomp_available())
+ return;
+ if (geteuid() != 0)
+ return;
+
+ assert_se(opinionated_personality(¤t) >= 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);
+}
+
+static void test_filter_sets_ordered(void) {
+ size_t i;
+
+ /* 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;
+ }
+ }
}
int main(int argc, char *argv[]) {
test_memory_deny_write_execute_shmat();
test_restrict_archs();
test_load_syscall_filter_set_raw();
+ test_lock_personality();
+ test_filter_sets_ordered();
return 0;
}
projects / thirdparty / systemd.git / blobdiff