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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <fcntl.h>
#include <sysexits.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include "alloc-util.h"
#include "fd-util.h"
#include "namespace.h"
#include "process-util.h"
#include "string-util.h"
#include "tests.h"
#include "user-util.h"
#include "virt.h"
TEST(namespace_cleanup_tmpdir) {
{
_cleanup_(namespace_cleanup_tmpdirp) char *dir;
assert_se(dir = strdup(RUN_SYSTEMD_EMPTY));
}
{
_cleanup_(namespace_cleanup_tmpdirp) char *dir;
assert_se(dir = strdup("/tmp/systemd-test-namespace.XXXXXX"));
assert_se(mkdtemp(dir));
}
}
static void test_tmpdir_one(const char *id, const char *A, const char *B) {
_cleanup_free_ char *a, *b;
struct stat x, y;
char *c, *d;
assert_se(setup_tmp_dirs(id, &a, &b) == 0);
assert_se(stat(a, &x) >= 0);
assert_se(stat(b, &y) >= 0);
assert_se(S_ISDIR(x.st_mode));
assert_se(S_ISDIR(y.st_mode));
if (!streq(a, RUN_SYSTEMD_EMPTY)) {
assert_se(startswith(a, A));
assert_se((x.st_mode & 01777) == 0700);
c = strjoina(a, "/tmp");
assert_se(stat(c, &x) >= 0);
assert_se(S_ISDIR(x.st_mode));
assert_se(FLAGS_SET(x.st_mode, 01777));
assert_se(rmdir(c) >= 0);
assert_se(rmdir(a) >= 0);
}
if (!streq(b, RUN_SYSTEMD_EMPTY)) {
assert_se(startswith(b, B));
assert_se((y.st_mode & 01777) == 0700);
d = strjoina(b, "/tmp");
assert_se(stat(d, &y) >= 0);
assert_se(S_ISDIR(y.st_mode));
assert_se(FLAGS_SET(y.st_mode, 01777));
assert_se(rmdir(d) >= 0);
assert_se(rmdir(b) >= 0);
}
}
TEST(tmpdir) {
_cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *zz = NULL;
sd_id128_t bid;
assert_se(sd_id128_get_boot(&bid) >= 0);
x = strjoin("/tmp/systemd-private-", SD_ID128_TO_STRING(bid), "-abcd.service-");
y = strjoin("/var/tmp/systemd-private-", SD_ID128_TO_STRING(bid), "-abcd.service-");
assert_se(x && y);
test_tmpdir_one("abcd.service", x, y);
z = strjoin("/tmp/systemd-private-", SD_ID128_TO_STRING(bid), "-sys-devices-pci0000:00-0000:00:1a.0-usb3-3\\x2d1-3\\x2d1:1.0-bluetooth-hci0.device-");
zz = strjoin("/var/tmp/systemd-private-", SD_ID128_TO_STRING(bid), "-sys-devices-pci0000:00-0000:00:1a.0-usb3-3\\x2d1-3\\x2d1:1.0-bluetooth-hci0.device-");
assert_se(z && zz);
test_tmpdir_one("sys-devices-pci0000:00-0000:00:1a.0-usb3-3\\x2d1-3\\x2d1:1.0-bluetooth-hci0.device", z, zz);
}
static void test_shareable_ns(unsigned long nsflag) {
_cleanup_close_pair_ int s[2] = EBADF_PAIR;
bool permission_denied = false;
pid_t pid1, pid2, pid3;
int r, n = 0;
siginfo_t si;
if (geteuid() > 0) {
(void) log_tests_skipped("not root");
return;
}
assert_se(socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, s) >= 0);
pid1 = fork();
assert_se(pid1 >= 0);
if (pid1 == 0) {
r = setup_shareable_ns(s, nsflag);
assert_se(r >= 0 || ERRNO_IS_NEG_PRIVILEGE(r));
_exit(r >= 0 ? r : EX_NOPERM);
}
pid2 = fork();
assert_se(pid2 >= 0);
if (pid2 == 0) {
r = setup_shareable_ns(s, nsflag);
assert_se(r >= 0 || ERRNO_IS_NEG_PRIVILEGE(r));
_exit(r >= 0 ? r : EX_NOPERM);
}
pid3 = fork();
assert_se(pid3 >= 0);
if (pid3 == 0) {
r = setup_shareable_ns(s, nsflag);
assert_se(r >= 0 || ERRNO_IS_NEG_PRIVILEGE(r));
_exit(r >= 0 ? r : EX_NOPERM);
}
r = wait_for_terminate(pid1, &si);
assert_se(r >= 0);
assert_se(si.si_code == CLD_EXITED);
if (si.si_status == EX_NOPERM)
permission_denied = true;
else
n += si.si_status;
r = wait_for_terminate(pid2, &si);
assert_se(r >= 0);
assert_se(si.si_code == CLD_EXITED);
if (si.si_status == EX_NOPERM)
permission_denied = true;
else
n += si.si_status;
r = wait_for_terminate(pid3, &si);
assert_se(r >= 0);
assert_se(si.si_code == CLD_EXITED);
if (si.si_status == EX_NOPERM)
permission_denied = true;
else
n += si.si_status;
/* LSMs can cause setup_shareable_ns() to fail with permission denied, do not fail the test in that
* case (e.g.: LXC with AppArmor on kernel < v6.2). */
if (permission_denied)
return (void) log_tests_skipped("insufficient privileges");
assert_se(n == 1);
}
TEST(netns) {
test_shareable_ns(CLONE_NEWNET);
}
TEST(ipcns) {
test_shareable_ns(CLONE_NEWIPC);
}
TEST(protect_kernel_logs) {
static const NamespaceParameters p = {
.runtime_scope = RUNTIME_SCOPE_SYSTEM,
.protect_kernel_logs = true,
};
pid_t pid;
int r;
if (geteuid() > 0) {
(void) log_tests_skipped("not root");
return;
}
/* In a container we likely don't have access to /dev/kmsg */
if (detect_container() > 0) {
(void) log_tests_skipped("in container");
return;
}
pid = fork();
assert_se(pid >= 0);
if (pid == 0) {
_cleanup_close_ int fd = -EBADF;
fd = open("/dev/kmsg", O_RDONLY | O_CLOEXEC);
assert_se(fd > 0);
r = setup_namespace(&p, NULL);
assert_se(r == 0);
assert_se(setresuid(UID_NOBODY, UID_NOBODY, UID_NOBODY) >= 0);
assert_se(open("/dev/kmsg", O_RDONLY | O_CLOEXEC) < 0);
assert_se(errno == EACCES);
_exit(EXIT_SUCCESS);
}
assert_se(wait_for_terminate_and_check("ns-kernellogs", pid, WAIT_LOG) == EXIT_SUCCESS);
}
static int intro(void) {
if (!have_namespaces())
return log_tests_skipped("Don't have namespace support");
return EXIT_SUCCESS;
}
DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro);
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