diff options
Diffstat (limited to 'src/test/test-execute.c')
| -rw-r--r-- | src/test/test-execute.c | 1550 |
1 files changed, 1550 insertions, 0 deletions
diff --git a/src/test/test-execute.c b/src/test/test-execute.c new file mode 100644 index 0000000..4f6ad5d --- /dev/null +++ b/src/test/test-execute.c @@ -0,0 +1,1550 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <stdio.h> +#include <sys/mount.h> +#include <sys/prctl.h> +#include <sys/types.h> + +#include "sd-event.h" + +#include "capability-util.h" +#include "cpu-set-util.h" +#include "copy.h" +#include "dropin.h" +#include "errno-list.h" +#include "fd-util.h" +#include "fileio.h" +#include "fs-util.h" +#include "macro.h" +#include "manager.h" +#include "missing_prctl.h" +#include "mkdir.h" +#include "mount-util.h" +#include "path-util.h" +#include "process-util.h" +#include "rm-rf.h" +#include "seccomp-util.h" +#include "service.h" +#include "signal-util.h" +#include "static-destruct.h" +#include "stat-util.h" +#include "tests.h" +#include "tmpfile-util.h" +#include "unit.h" +#include "user-util.h" +#include "virt.h" + +#define PRIVATE_UNIT_DIR "/run/test-execute-unit-dir" + +static char *user_runtime_unit_dir = NULL; +static bool can_unshare; +static bool have_net_dummy; +static bool have_netns; +static unsigned n_ran_tests = 0; + +STATIC_DESTRUCTOR_REGISTER(user_runtime_unit_dir, freep); + +typedef void (*test_function_t)(Manager *m); + +static int cld_dumped_to_killed(int code) { + /* Depending on the system, seccomp version, … some signals might result in dumping, others in plain + * killing. Let's ignore the difference here, and map both cases to CLD_KILLED */ + return code == CLD_DUMPED ? CLD_KILLED : code; +} + +static void wait_for_service_finish(Manager *m, Unit *unit) { + Service *service = NULL; + usec_t ts; + usec_t timeout = 2 * USEC_PER_MINUTE; + + assert_se(m); + assert_se(unit); + + service = SERVICE(unit); + printf("%s\n", unit->id); + exec_context_dump(&service->exec_context, stdout, "\t"); + ts = now(CLOCK_MONOTONIC); + while (!IN_SET(service->state, SERVICE_DEAD, SERVICE_FAILED)) { + int r; + usec_t n; + + r = sd_event_run(m->event, 100 * USEC_PER_MSEC); + assert_se(r >= 0); + + n = now(CLOCK_MONOTONIC); + if (ts + timeout < n) { + log_error("Test timeout when testing %s", unit->id); + r = unit_kill(unit, KILL_ALL, SIGKILL, SI_USER, 0, NULL); + if (r < 0) + log_error_errno(r, "Failed to kill %s: %m", unit->id); + exit(EXIT_FAILURE); + } + } +} + +static void check_main_result(const char *file, unsigned line, const char *func, + Manager *m, Unit *unit, int status_expected, int code_expected) { + Service *service = NULL; + + assert_se(m); + assert_se(unit); + + wait_for_service_finish(m, unit); + + service = SERVICE(unit); + exec_status_dump(&service->main_exec_status, stdout, "\t"); + + if (cld_dumped_to_killed(service->main_exec_status.code) != cld_dumped_to_killed(code_expected)) { + log_error("%s:%u:%s %s: can_unshare=%s: exit code %d, expected %d", + file, line, func, unit->id, yes_no(can_unshare), + service->main_exec_status.code, code_expected); + abort(); + } + + if (service->main_exec_status.status != status_expected) { + log_error("%s:%u:%s: %s: can_unshare=%s: exit status %d, expected %d", + file, line, func, unit->id, yes_no(can_unshare), + service->main_exec_status.status, status_expected); + abort(); + } +} + +static void check_service_result(const char *file, unsigned line, const char *func, + Manager *m, Unit *unit, ServiceResult result_expected) { + Service *service = NULL; + + assert_se(m); + assert_se(unit); + + wait_for_service_finish(m, unit); + + service = SERVICE(unit); + + if (service->result != result_expected) { + log_error("%s:%u:%s: %s: can_unshare=%s: service end result %s, expected %s", + file, line, func, unit->id, yes_no(can_unshare), + service_result_to_string(service->result), + service_result_to_string(result_expected)); + abort(); + } +} + +static bool check_nobody_user_and_group(void) { + static int cache = -1; + struct passwd *p; + struct group *g; + + if (cache >= 0) + return !!cache; + + if (!synthesize_nobody()) + goto invalid; + + p = getpwnam(NOBODY_USER_NAME); + if (!p || + !streq(p->pw_name, NOBODY_USER_NAME) || + p->pw_uid != UID_NOBODY || + p->pw_gid != GID_NOBODY) + goto invalid; + + p = getpwuid(UID_NOBODY); + if (!p || + !streq(p->pw_name, NOBODY_USER_NAME) || + p->pw_uid != UID_NOBODY || + p->pw_gid != GID_NOBODY) + goto invalid; + + g = getgrnam(NOBODY_GROUP_NAME); + if (!g || + !streq(g->gr_name, NOBODY_GROUP_NAME) || + g->gr_gid != GID_NOBODY) + goto invalid; + + g = getgrgid(GID_NOBODY); + if (!g || + !streq(g->gr_name, NOBODY_GROUP_NAME) || + g->gr_gid != GID_NOBODY) + goto invalid; + + cache = 1; + return true; + +invalid: + cache = 0; + return false; +} + +static bool check_user_has_group_with_same_name(const char *name) { + struct passwd *p; + struct group *g; + + assert_se(name); + + p = getpwnam(name); + if (!p || + !streq(p->pw_name, name)) + return false; + + g = getgrgid(p->pw_gid); + if (!g || + !streq(g->gr_name, name)) + return false; + + return true; +} + +static bool is_inaccessible_available(void) { + FOREACH_STRING(p, + "/run/systemd/inaccessible/reg", + "/run/systemd/inaccessible/dir", + "/run/systemd/inaccessible/chr", + "/run/systemd/inaccessible/blk", + "/run/systemd/inaccessible/fifo", + "/run/systemd/inaccessible/sock") + if (access(p, F_OK) < 0) + return false; + + return true; +} + +static void start_parent_slices(Unit *unit) { + Unit *slice; + + slice = UNIT_GET_SLICE(unit); + if (slice) { + start_parent_slices(slice); + int r = unit_start(slice, NULL); + assert_se(r >= 0 || r == -EALREADY); + } +} + +static bool have_userns_privileges(void) { + pid_t pid; + int r; + + r = safe_fork("(sd-test-check-userns)", + FORK_RESET_SIGNALS | + FORK_CLOSE_ALL_FDS | + FORK_DEATHSIG_SIGKILL, + &pid); + assert(r >= 0); + if (r == 0) { + /* Keep CAP_SYS_ADMIN if we have it to ensure we give an + * accurate result to the caller. Some kernels have a + * kernel.unprivileged_userns_clone sysctl which can be + * configured to make CLONE_NEWUSER require CAP_SYS_ADMIN. + * Additionally, AppArmor may restrict unprivileged user + * namespace creation. */ + r = capability_bounding_set_drop(UINT64_C(1) << CAP_SYS_ADMIN, /* right_now = */ true); + if (r < 0) { + log_debug_errno(r, "Failed to drop capabilities: %m"); + _exit(2); + } + + r = RET_NERRNO(unshare(CLONE_NEWUSER)); + if (r < 0 && !ERRNO_IS_NEG_PRIVILEGE(r)) + log_debug_errno(r, "Failed to create user namespace: %m"); + + _exit(r >= 0 ? EXIT_SUCCESS : ERRNO_IS_NEG_PRIVILEGE(r) ? EXIT_FAILURE : 2); + } + + /* The exit code records the result of the check: + * EXIT_SUCCESS => we can use user namespaces + * EXIT_FAILURE => we can NOT use user namespaces + * 2 => some other error occurred */ + r = wait_for_terminate_and_check("(sd-test-check-userns)", pid, 0); + if (!IN_SET(r, EXIT_SUCCESS, EXIT_FAILURE)) + log_debug("Failed to check if user namespaces can be used, assuming not."); + + return r == EXIT_SUCCESS; +} + +static void _test(const char *file, unsigned line, const char *func, + Manager *m, const char *unit_name, int status_expected, int code_expected) { + Unit *unit; + + assert_se(unit_name); + + assert_se(manager_load_startable_unit_or_warn(m, unit_name, NULL, &unit) >= 0); + /* We need to start the slices as well otherwise the slice cgroups might be pruned + * in on_cgroup_empty_event. */ + start_parent_slices(unit); + assert_se(unit_start(unit, NULL) >= 0); + check_main_result(file, line, func, m, unit, status_expected, code_expected); + + ++n_ran_tests; +} +#define test(m, unit_name, status_expected, code_expected) \ + _test(PROJECT_FILE, __LINE__, __func__, m, unit_name, status_expected, code_expected) + +static void _test_service(const char *file, unsigned line, const char *func, + Manager *m, const char *unit_name, ServiceResult result_expected) { + Unit *unit; + + assert_se(unit_name); + + assert_se(manager_load_startable_unit_or_warn(m, unit_name, NULL, &unit) >= 0); + assert_se(unit_start(unit, NULL) >= 0); + check_service_result(file, line, func, m, unit, result_expected); +} +#define test_service(m, unit_name, result_expected) \ + _test_service(PROJECT_FILE, __LINE__, __func__, m, unit_name, result_expected) + +static void test_exec_bindpaths(Manager *m) { + assert_se(mkdir_p("/tmp/test-exec-bindpaths", 0755) >= 0); + assert_se(mkdir_p("/tmp/test-exec-bindreadonlypaths", 0755) >= 0); + + test(m, "exec-bindpaths.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED); + + (void) rm_rf("/tmp/test-exec-bindpaths", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/tmp/test-exec-bindreadonlypaths", REMOVE_ROOT|REMOVE_PHYSICAL); +} + +static void test_exec_cpuaffinity(Manager *m) { + _cleanup_(cpu_set_reset) CPUSet c = {}; + + assert_se(cpu_set_realloc(&c, 8192) >= 0); /* just allocate the maximum possible size */ + assert_se(sched_getaffinity(0, c.allocated, c.set) >= 0); + + if (!CPU_ISSET_S(0, c.allocated, c.set)) { + log_notice("Cannot use CPU 0, skipping %s", __func__); + return; + } + + test(m, "exec-cpuaffinity1.service", 0, CLD_EXITED); + test(m, "exec-cpuaffinity2.service", 0, CLD_EXITED); + + if (!CPU_ISSET_S(1, c.allocated, c.set) || + !CPU_ISSET_S(2, c.allocated, c.set)) { + log_notice("Cannot use CPU 1 or 2, skipping remaining tests in %s", __func__); + return; + } + + test(m, "exec-cpuaffinity3.service", 0, CLD_EXITED); +} + +static void test_exec_credentials(Manager *m) { + test(m, "exec-set-credential.service", 0, CLD_EXITED); + test(m, "exec-load-credential.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_CREDENTIALS, CLD_EXITED); + test(m, "exec-credentials-dir-specifier.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_CREDENTIALS, CLD_EXITED); +} + +static void test_exec_workingdirectory(Manager *m) { + assert_se(mkdir_p("/tmp/test-exec_workingdirectory", 0755) >= 0); + + test(m, "exec-workingdirectory.service", 0, CLD_EXITED); + test(m, "exec-workingdirectory-trailing-dot.service", 0, CLD_EXITED); + + (void) rm_rf("/tmp/test-exec_workingdirectory", REMOVE_ROOT|REMOVE_PHYSICAL); +} + +static void test_exec_execsearchpath(Manager *m) { + assert_se(mkdir_p("/tmp/test-exec_execsearchpath", 0755) >= 0); + + assert_se(copy_file("/bin/ls", "/tmp/test-exec_execsearchpath/ls_temp", 0, 0777, COPY_REPLACE) >= 0); + + test(m, "exec-execsearchpath.service", 0, CLD_EXITED); + + assert_se(rm_rf("/tmp/test-exec_execsearchpath", REMOVE_ROOT|REMOVE_PHYSICAL) >= 0); + + test(m, "exec-execsearchpath.service", EXIT_EXEC, CLD_EXITED); +} + +static void test_exec_execsearchpath_specifier(Manager *m) { + test(m, "exec-execsearchpath-unit-specifier.service", 0, CLD_EXITED); +} + +static void test_exec_execsearchpath_environment(Manager *m) { + test(m, "exec-execsearchpath-environment.service", 0, CLD_EXITED); + test(m, "exec-execsearchpath-environment-path-set.service", 0, CLD_EXITED); +} + +static void test_exec_execsearchpath_environment_files(Manager *m) { + static const char path_not_set[] = + "VAR1='word1 word2'\n" + "VAR2=word3 \n" + "# comment1\n" + "\n" + "; comment2\n" + " ; # comment3\n" + "line without an equal\n" + "VAR3='$word 5 6'\n" + "VAR4='new\nline'\n" + "VAR5=password\\with\\backslashes"; + + static const char path_set[] = + "VAR1='word1 word2'\n" + "VAR2=word3 \n" + "# comment1\n" + "\n" + "; comment2\n" + " ; # comment3\n" + "line without an equal\n" + "VAR3='$word 5 6'\n" + "VAR4='new\nline'\n" + "VAR5=password\\with\\backslashes\n" + "PATH=/usr"; + + int r; + + r = write_string_file("/tmp/test-exec_execsearchpath_environmentfile.conf", path_not_set, WRITE_STRING_FILE_CREATE); + + assert_se(r == 0); + + test(m, "exec-execsearchpath-environmentfile.service", 0, CLD_EXITED); + + (void) unlink("/tmp/test-exec_environmentfile.conf"); + + + r = write_string_file("/tmp/test-exec_execsearchpath_environmentfile-set.conf", path_set, WRITE_STRING_FILE_CREATE); + + assert_se(r == 0); + + test(m, "exec-execsearchpath-environmentfile-set.service", 0, CLD_EXITED); + + (void) unlink("/tmp/test-exec_environmentfile-set.conf"); +} + +static void test_exec_execsearchpath_passenvironment(Manager *m) { + assert_se(setenv("VAR1", "word1 word2", 1) == 0); + assert_se(setenv("VAR2", "word3", 1) == 0); + assert_se(setenv("VAR3", "$word 5 6", 1) == 0); + assert_se(setenv("VAR4", "new\nline", 1) == 0); + assert_se(setenv("VAR5", "passwordwithbackslashes", 1) == 0); + + test(m, "exec-execsearchpath-passenvironment.service", 0, CLD_EXITED); + + assert_se(setenv("PATH", "/usr", 1) == 0); + test(m, "exec-execsearchpath-passenvironment-set.service", 0, CLD_EXITED); + + assert_se(unsetenv("VAR1") == 0); + assert_se(unsetenv("VAR2") == 0); + assert_se(unsetenv("VAR3") == 0); + assert_se(unsetenv("VAR4") == 0); + assert_se(unsetenv("VAR5") == 0); + assert_se(unsetenv("PATH") == 0); +} + +static void test_exec_personality(Manager *m) { +#if defined(__x86_64__) + test(m, "exec-personality-x86-64.service", 0, CLD_EXITED); + +#elif defined(__s390__) + test(m, "exec-personality-s390.service", 0, CLD_EXITED); + +#elif defined(__powerpc64__) +# if __BYTE_ORDER == __BIG_ENDIAN + test(m, "exec-personality-ppc64.service", 0, CLD_EXITED); +# else + test(m, "exec-personality-ppc64le.service", 0, CLD_EXITED); +# endif + +#elif defined(__aarch64__) + test(m, "exec-personality-aarch64.service", 0, CLD_EXITED); + +#elif defined(__i386__) + test(m, "exec-personality-x86.service", 0, CLD_EXITED); +#elif defined(__loongarch_lp64) + test(m, "exec-personality-loongarch64.service", 0, CLD_EXITED); +#else + log_notice("Unknown personality, skipping %s", __func__); +#endif +} + +static void test_exec_ignoresigpipe(Manager *m) { + test(m, "exec-ignoresigpipe-yes.service", 0, CLD_EXITED); + test(m, "exec-ignoresigpipe-no.service", SIGPIPE, CLD_KILLED); +} + +static void test_exec_privatetmp(Manager *m) { + assert_se(touch("/tmp/test-exec_privatetmp") >= 0); + + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) { + test(m, "exec-privatetmp-yes.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-privatetmp-disabled-by-prefix.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + } + + test(m, "exec-privatetmp-no.service", 0, CLD_EXITED); + + (void) unlink("/tmp/test-exec_privatetmp"); +} + +static void test_exec_privatedevices(Manager *m) { + int r; + + if (detect_container() > 0) { + log_notice("Testing in container, skipping %s", __func__); + return; + } + if (!is_inaccessible_available()) { + log_notice("Testing without inaccessible, skipping %s", __func__); + return; + } + + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) { + test(m, "exec-privatedevices-yes.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + if (access("/dev/kmsg", F_OK) >= 0) + test(m, "exec-privatedevices-bind.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-privatedevices-disabled-by-prefix.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-privatedevices-yes-with-group.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + } + + test(m, "exec-privatedevices-no.service", 0, CLD_EXITED); + + /* We use capsh to test if the capabilities are + * properly set, so be sure that it exists */ + r = find_executable("capsh", NULL); + if (r < 0) { + log_notice_errno(r, "Could not find capsh binary, skipping remaining tests in %s: %m", __func__); + return; + } + + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) { + test(m, "exec-privatedevices-yes-capability-mknod.service", can_unshare || MANAGER_IS_SYSTEM(m) ? 0 : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-privatedevices-yes-capability-sys-rawio.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_NAMESPACE, CLD_EXITED); + } + + test(m, "exec-privatedevices-no-capability-mknod.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_FAILURE, CLD_EXITED); + test(m, "exec-privatedevices-no-capability-sys-rawio.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_FAILURE, CLD_EXITED); +} + +static void test_exec_protecthome(Manager *m) { + if (!can_unshare) { + log_notice("Cannot reliably unshare, skipping %s", __func__); + return; + } + + test(m, "exec-protecthome-tmpfs-vs-protectsystem-strict.service", 0, CLD_EXITED); +} + +static void test_exec_protectkernelmodules(Manager *m) { + int r; + + if (detect_container() > 0) { + log_notice("Testing in container, skipping %s", __func__); + return; + } + if (!is_inaccessible_available()) { + log_notice("Testing without inaccessible, skipping %s", __func__); + return; + } + + r = find_executable("capsh", NULL); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find capsh binary: %m", __func__); + return; + } + + test(m, "exec-protectkernelmodules-no-capabilities.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_FAILURE, CLD_EXITED); + + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) { + test(m, "exec-protectkernelmodules-yes-capabilities.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-protectkernelmodules-yes-mount-propagation.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + } +} + +static void test_exec_readonlypaths(Manager *m) { + + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) + test(m, "exec-readonlypaths-simple.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + + if (path_is_read_only_fs("/var") > 0) { + log_notice("Directory /var is readonly, skipping remaining tests in %s", __func__); + return; + } + + test(m, "exec-readonlypaths.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-readonlypaths-with-bindpaths.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-readonlypaths-mount-propagation.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); +} + +static void test_exec_readwritepaths(Manager *m) { + + if (path_is_read_only_fs("/") > 0) { + log_notice("Root directory is readonly, skipping %s", __func__); + return; + } + + test(m, "exec-readwritepaths-mount-propagation.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); +} + +static void test_exec_inaccessiblepaths(Manager *m) { + + if (!is_inaccessible_available()) { + log_notice("Testing without inaccessible, skipping %s", __func__); + return; + } + + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) + test(m, "exec-inaccessiblepaths-sys.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + + if (path_is_read_only_fs("/") > 0) { + log_notice("Root directory is readonly, skipping remaining tests in %s", __func__); + return; + } + + test(m, "exec-inaccessiblepaths-mount-propagation.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); +} + +static int on_spawn_io(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + char **result = userdata; + char buf[4096]; + ssize_t l; + + assert_se(s); + assert_se(fd >= 0); + + l = read(fd, buf, sizeof(buf) - 1); + if (l < 0) { + if (errno == EAGAIN) + goto reenable; + + return 0; + } + if (l == 0) + return 0; + + buf[l] = '\0'; + if (result) + assert_se(strextend(result, buf)); + else + log_error("ldd: %s", buf); + +reenable: + /* Re-enable the event source if we did not encounter EOF */ + assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0); + return 0; +} + +static int on_spawn_timeout(sd_event_source *s, uint64_t usec, void *userdata) { + pid_t *pid = userdata; + + assert_se(pid); + + (void) kill(*pid, SIGKILL); + + return 1; +} + +static int on_spawn_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) { + int ret = -EIO; + + assert_se(si); + + if (si->si_code == CLD_EXITED) + ret = si->si_status; + + sd_event_exit(sd_event_source_get_event(s), ret); + return 1; +} + +static int find_libraries(const char *exec, char ***ret) { + _cleanup_(sd_event_unrefp) sd_event *e = NULL; + _cleanup_(sd_event_source_unrefp) sd_event_source *sigchld_source = NULL; + _cleanup_(sd_event_source_unrefp) sd_event_source *stdout_source = NULL; + _cleanup_(sd_event_source_unrefp) sd_event_source *stderr_source = NULL; + _cleanup_close_pair_ int outpipe[2] = EBADF_PAIR, errpipe[2] = EBADF_PAIR; + _cleanup_strv_free_ char **libraries = NULL; + _cleanup_free_ char *result = NULL; + pid_t pid; + int r; + + assert_se(exec); + assert_se(ret); + + assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0); + + assert_se(pipe2(outpipe, O_NONBLOCK|O_CLOEXEC) == 0); + assert_se(pipe2(errpipe, O_NONBLOCK|O_CLOEXEC) == 0); + + r = safe_fork_full("(spawn-ldd)", + (int[]) { -EBADF, outpipe[1], errpipe[1] }, + NULL, 0, + FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_DEATHSIG_SIGTERM|FORK_REARRANGE_STDIO|FORK_LOG, &pid); + assert_se(r >= 0); + if (r == 0) { + execlp("ldd", "ldd", exec, NULL); + _exit(EXIT_FAILURE); + } + + outpipe[1] = safe_close(outpipe[1]); + errpipe[1] = safe_close(errpipe[1]); + + assert_se(sd_event_new(&e) >= 0); + + assert_se(sd_event_add_time_relative(e, NULL, CLOCK_MONOTONIC, + 10 * USEC_PER_SEC, USEC_PER_SEC, on_spawn_timeout, &pid) >= 0); + assert_se(sd_event_add_io(e, &stdout_source, outpipe[0], EPOLLIN, on_spawn_io, &result) >= 0); + assert_se(sd_event_source_set_enabled(stdout_source, SD_EVENT_ONESHOT) >= 0); + assert_se(sd_event_add_io(e, &stderr_source, errpipe[0], EPOLLIN, on_spawn_io, NULL) >= 0); + assert_se(sd_event_source_set_enabled(stderr_source, SD_EVENT_ONESHOT) >= 0); + assert_se(sd_event_add_child(e, &sigchld_source, pid, WEXITED, on_spawn_sigchld, NULL) >= 0); + /* SIGCHLD should be processed after IO is complete */ + assert_se(sd_event_source_set_priority(sigchld_source, SD_EVENT_PRIORITY_NORMAL + 1) >= 0); + + assert_se(sd_event_loop(e) >= 0); + + _cleanup_strv_free_ char **v = NULL; + assert_se(strv_split_newlines_full(&v, result, 0) >= 0); + + STRV_FOREACH(q, v) { + _cleanup_free_ char *word = NULL; + const char *p = *q; + + r = extract_first_word(&p, &word, NULL, 0); + assert_se(r >= 0); + if (r == 0) + continue; + + if (path_is_absolute(word)) { + assert_se(strv_consume(&libraries, TAKE_PTR(word)) >= 0); + continue; + } + + word = mfree(word); + r = extract_first_word(&p, &word, NULL, 0); + assert_se(r >= 0); + if (r == 0) + continue; + + if (!streq_ptr(word, "=>")) + continue; + + word = mfree(word); + r = extract_first_word(&p, &word, NULL, 0); + assert_se(r >= 0); + if (r == 0) + continue; + + if (path_is_absolute(word)) { + assert_se(strv_consume(&libraries, TAKE_PTR(word)) >= 0); + continue; + } + } + + *ret = TAKE_PTR(libraries); + return 0; +} + +static void test_exec_mount_apivfs(Manager *m) { + _cleanup_free_ char *fullpath_touch = NULL, *fullpath_test = NULL, *data = NULL; + _cleanup_strv_free_ char **libraries = NULL, **libraries_test = NULL; + int r; + + assert_se(user_runtime_unit_dir); + + r = find_executable("ldd", NULL); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find 'ldd' command: %m", __func__); + return; + } + r = find_executable("touch", &fullpath_touch); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find 'touch' command: %m", __func__); + return; + } + r = find_executable("test", &fullpath_test); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find 'test' command: %m", __func__); + return; + } + + if (MANAGER_IS_USER(m) && !have_userns_privileges()) + return (void)log_notice("Skipping %s, do not have user namespace privileges", __func__); + + assert_se(find_libraries(fullpath_touch, &libraries) >= 0); + assert_se(find_libraries(fullpath_test, &libraries_test) >= 0); + assert_se(strv_extend_strv(&libraries, libraries_test, true) >= 0); + + assert_se(strextend(&data, "[Service]\n")); + assert_se(strextend(&data, "ExecStart=", fullpath_touch, " /aaa\n")); + assert_se(strextend(&data, "ExecStart=", fullpath_test, " -f /aaa\n")); + assert_se(strextend(&data, "BindReadOnlyPaths=", fullpath_touch, "\n")); + assert_se(strextend(&data, "BindReadOnlyPaths=", fullpath_test, "\n")); + + STRV_FOREACH(p, libraries) + assert_se(strextend(&data, "BindReadOnlyPaths=", *p, "\n")); + + assert_se(write_drop_in(user_runtime_unit_dir, "exec-mount-apivfs-no.service", 10, "bind-mount", data) >= 0); + + assert_se(mkdir_p("/tmp/test-exec-mount-apivfs-no/root", 0755) >= 0); + + test(m, "exec-mount-apivfs-no.service", can_unshare || !MANAGER_IS_SYSTEM(m) ? 0 : EXIT_NAMESPACE, CLD_EXITED); + + (void) rm_rf("/tmp/test-exec-mount-apivfs-no/root", REMOVE_ROOT|REMOVE_PHYSICAL); +} + +static void test_exec_noexecpaths(Manager *m) { + + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) + test(m, "exec-noexecpaths-simple.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); + else + return (void)log_notice("Skipping %s, do not have user namespace privileges", __func__); +} + +static void test_exec_temporaryfilesystem(Manager *m) { + + test(m, "exec-temporaryfilesystem-options.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-temporaryfilesystem-ro.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-temporaryfilesystem-rw.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-temporaryfilesystem-usr.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED); +} + +static void test_exec_systemcallfilter(Manager *m) { +#if HAVE_SECCOMP + int r; + + if (!is_seccomp_available()) { + log_notice("Seccomp not available, skipping %s", __func__); + return; + } + + test(m, "exec-systemcallfilter-not-failing.service", 0, CLD_EXITED); + test(m, "exec-systemcallfilter-not-failing2.service", 0, CLD_EXITED); + test(m, "exec-systemcallfilter-not-failing3.service", 0, CLD_EXITED); + test(m, "exec-systemcallfilter-failing.service", SIGSYS, CLD_KILLED); + test(m, "exec-systemcallfilter-failing2.service", SIGSYS, CLD_KILLED); + test(m, "exec-systemcallfilter-failing3.service", SIGSYS, CLD_KILLED); + + r = find_executable("python3", NULL); + if (r < 0) { + log_notice_errno(r, "Skipping remaining tests in %s, could not find python3 binary: %m", __func__); + return; + } + + test(m, "exec-systemcallfilter-with-errno-name.service", errno_from_name("EILSEQ"), CLD_EXITED); + test(m, "exec-systemcallfilter-with-errno-number.service", 255, CLD_EXITED); + test(m, "exec-systemcallfilter-with-errno-multi.service", errno_from_name("EILSEQ"), CLD_EXITED); + test(m, "exec-systemcallfilter-with-errno-in-allow-list.service", errno_from_name("EILSEQ"), CLD_EXITED); + test(m, "exec-systemcallfilter-override-error-action.service", SIGSYS, CLD_KILLED); + test(m, "exec-systemcallfilter-override-error-action2.service", errno_from_name("EILSEQ"), CLD_EXITED); + + test(m, "exec-systemcallfilter-nonewprivileges.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); + test(m, "exec-systemcallfilter-nonewprivileges-protectclock.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); + + r = find_executable("capsh", NULL); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find capsh binary: %m", __func__); + return; + } + + test(m, "exec-systemcallfilter-nonewprivileges-bounding1.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); + test(m, "exec-systemcallfilter-nonewprivileges-bounding2.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); +#endif +} + +static void test_exec_systemcallerrornumber(Manager *m) { +#if HAVE_SECCOMP + int r; + + if (!is_seccomp_available()) { + log_notice("Seccomp not available, skipping %s", __func__); + return; + } + + r = find_executable("python3", NULL); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find python3 binary: %m", __func__); + return; + } + + test(m, "exec-systemcallerrornumber-name.service", errno_from_name("EACCES"), CLD_EXITED); + test(m, "exec-systemcallerrornumber-number.service", 255, CLD_EXITED); +#endif +} + +static void test_exec_restrictnamespaces(Manager *m) { +#if HAVE_SECCOMP + if (!is_seccomp_available()) { + log_notice("Seccomp not available, skipping %s", __func__); + return; + } + + test(m, "exec-restrictnamespaces-no.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED); + test(m, "exec-restrictnamespaces-yes.service", 1, CLD_EXITED); + test(m, "exec-restrictnamespaces-mnt.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED); + test(m, "exec-restrictnamespaces-mnt-deny-list.service", 1, CLD_EXITED); + test(m, "exec-restrictnamespaces-merge-and.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED); + test(m, "exec-restrictnamespaces-merge-or.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED); + test(m, "exec-restrictnamespaces-merge-all.service", can_unshare ? 0 : EXIT_FAILURE, CLD_EXITED); +#endif +} + +static void test_exec_systemcallfilter_system(Manager *m) { +/* Skip this particular test case when running under ASan, as + * LSan intermittently segfaults when accessing memory right + * after the test finishes. Generally, ASan & LSan don't like + * the seccomp stuff. + */ +#if HAVE_SECCOMP && !HAS_FEATURE_ADDRESS_SANITIZER + if (!is_seccomp_available()) { + log_notice("Seccomp not available, skipping %s", __func__); + return; + } + + test(m, "exec-systemcallfilter-system-user.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); + + if (!check_nobody_user_and_group()) { + log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__); + return; + } + + if (!STR_IN_SET(NOBODY_USER_NAME, "nobody", "nfsnobody")) { + log_notice("Unsupported nobody user name '%s', skipping remaining tests in %s", NOBODY_USER_NAME, __func__); + return; + } + + test(m, "exec-systemcallfilter-system-user-" NOBODY_USER_NAME ".service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); +#endif +} + +static void test_exec_user(Manager *m) { + test(m, "exec-user.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); + + if (!check_nobody_user_and_group()) { + log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__); + return; + } + + if (!STR_IN_SET(NOBODY_USER_NAME, "nobody", "nfsnobody")) { + log_notice("Unsupported nobody user name '%s', skipping remaining tests in %s", NOBODY_USER_NAME, __func__); + return; + } + + test(m, "exec-user-" NOBODY_USER_NAME ".service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); +} + +static void test_exec_group(Manager *m) { + test(m, "exec-group.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); + + if (!check_nobody_user_and_group()) { + log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__); + return; + } + + if (!STR_IN_SET(NOBODY_GROUP_NAME, "nobody", "nfsnobody", "nogroup")) { + log_notice("Unsupported nobody group name '%s', skipping remaining tests in %s", NOBODY_GROUP_NAME, __func__); + return; + } + + test(m, "exec-group-" NOBODY_GROUP_NAME ".service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); +} + +static void test_exec_supplementarygroups(Manager *m) { + int status = MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP; + test(m, "exec-supplementarygroups.service", status, CLD_EXITED); + test(m, "exec-supplementarygroups-single-group.service", status, CLD_EXITED); + test(m, "exec-supplementarygroups-single-group-user.service", status, CLD_EXITED); + test(m, "exec-supplementarygroups-multiple-groups-default-group-user.service", status, CLD_EXITED); + test(m, "exec-supplementarygroups-multiple-groups-withgid.service", status, CLD_EXITED); + test(m, "exec-supplementarygroups-multiple-groups-withuid.service", status, CLD_EXITED); +} + +static char* private_directory_bad(Manager *m) { + /* This mirrors setup_exec_directory(). */ + + for (ExecDirectoryType dt = 0; dt < _EXEC_DIRECTORY_TYPE_MAX; dt++) { + _cleanup_free_ char *p = NULL; + struct stat st; + + assert_se(p = path_join(m->prefix[dt], "private")); + + if (stat(p, &st) >= 0 && + (st.st_mode & (S_IRWXG|S_IRWXO))) + return TAKE_PTR(p); + } + + return NULL; +} + +static void test_exec_dynamicuser(Manager *m) { + _cleanup_free_ char *bad = private_directory_bad(m); + if (bad) { + log_warning("%s: %s has bad permissions, skipping test.", __func__, bad); + return; + } + + if (strstr_ptr(ci_environment(), "github-actions")) { + log_notice("%s: skipping test on GH Actions because of systemd/systemd#10337", __func__); + return; + } + + int status = can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_NAMESPACE : EXIT_GROUP; + + test(m, "exec-dynamicuser-fixeduser.service", status, CLD_EXITED); + if (check_user_has_group_with_same_name("adm")) + test(m, "exec-dynamicuser-fixeduser-adm.service", status, CLD_EXITED); + if (check_user_has_group_with_same_name("games")) + test(m, "exec-dynamicuser-fixeduser-games.service", status, CLD_EXITED); + test(m, "exec-dynamicuser-fixeduser-one-supplementarygroup.service", status, CLD_EXITED); + test(m, "exec-dynamicuser-supplementarygroups.service", status, CLD_EXITED); + test(m, "exec-dynamicuser-statedir.service", status, CLD_EXITED); + + (void) rm_rf("/var/lib/quux", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/waldo", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/private/quux", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/private/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/private/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/private/waldo", REMOVE_ROOT|REMOVE_PHYSICAL); + + test(m, "exec-dynamicuser-statedir-migrate-step1.service", 0, CLD_EXITED); + test(m, "exec-dynamicuser-statedir-migrate-step2.service", status, CLD_EXITED); + test(m, "exec-dynamicuser-statedir-migrate-step1.service", 0, CLD_EXITED); + + (void) rm_rf("/var/lib/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/private/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf("/var/lib/private/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL); + + test(m, "exec-dynamicuser-runtimedirectory1.service", status, CLD_EXITED); + test(m, "exec-dynamicuser-runtimedirectory2.service", status, CLD_EXITED); + test(m, "exec-dynamicuser-runtimedirectory3.service", status, CLD_EXITED); +} + +static void test_exec_environment(Manager *m) { + test(m, "exec-environment-no-substitute.service", 0, CLD_EXITED); + test(m, "exec-environment.service", 0, CLD_EXITED); + test(m, "exec-environment-multiple.service", 0, CLD_EXITED); + test(m, "exec-environment-empty.service", 0, CLD_EXITED); +} + +static void test_exec_environmentfile(Manager *m) { + static const char e[] = + "VAR1='word1 word2'\n" + "VAR2=word3 \n" + "# comment1\n" + "\n" + "; comment2\n" + " ; # comment3\n" + "line without an equal\n" + "VAR3='$word 5 6'\n" + "VAR4='new\nline'\n" + "VAR5=password\\with\\backslashes"; + int r; + + r = write_string_file("/tmp/test-exec_environmentfile.conf", e, WRITE_STRING_FILE_CREATE); + assert_se(r == 0); + + test(m, "exec-environmentfile.service", 0, CLD_EXITED); + + (void) unlink("/tmp/test-exec_environmentfile.conf"); +} + +static void test_exec_passenvironment(Manager *m) { + /* test-execute runs under MANAGER_USER which, by default, forwards all + * variables present in the environment, but only those that are + * present _at the time it is created_! + * + * So these PassEnvironment checks are still expected to work, since we + * are ensuring the variables are not present at manager creation (they + * are unset explicitly in main) and are only set here. + * + * This is still a good approximation of how a test for MANAGER_SYSTEM + * would work. + */ + assert_se(setenv("VAR1", "word1 word2", 1) == 0); + assert_se(setenv("VAR2", "word3", 1) == 0); + assert_se(setenv("VAR3", "$word 5 6", 1) == 0); + assert_se(setenv("VAR4", "new\nline", 1) == 0); + assert_se(setenv("VAR5", "passwordwithbackslashes", 1) == 0); + test(m, "exec-passenvironment.service", 0, CLD_EXITED); + test(m, "exec-passenvironment-repeated.service", 0, CLD_EXITED); + test(m, "exec-passenvironment-empty.service", 0, CLD_EXITED); + assert_se(unsetenv("VAR1") == 0); + assert_se(unsetenv("VAR2") == 0); + assert_se(unsetenv("VAR3") == 0); + assert_se(unsetenv("VAR4") == 0); + assert_se(unsetenv("VAR5") == 0); + test(m, "exec-passenvironment-absent.service", 0, CLD_EXITED); +} + +static void test_exec_umask(Manager *m) { + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) { + test(m, "exec-umask-default.service", can_unshare || MANAGER_IS_SYSTEM(m) ? 0 : EXIT_NAMESPACE, CLD_EXITED); + test(m, "exec-umask-0177.service", can_unshare || MANAGER_IS_SYSTEM(m) ? 0 : EXIT_NAMESPACE, CLD_EXITED); + } else + return (void)log_notice("Skipping %s, do not have user namespace privileges", __func__); +} + +static void test_exec_runtimedirectory(Manager *m) { + (void) rm_rf("/run/test-exec_runtimedirectory2", REMOVE_ROOT|REMOVE_PHYSICAL); + test(m, "exec-runtimedirectory.service", 0, CLD_EXITED); + (void) rm_rf("/run/test-exec_runtimedirectory2", REMOVE_ROOT|REMOVE_PHYSICAL); + + test(m, "exec-runtimedirectory-mode.service", 0, CLD_EXITED); + test(m, "exec-runtimedirectory-owner.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); + + if (!check_nobody_user_and_group()) { + log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__); + return; + } + + if (!STR_IN_SET(NOBODY_GROUP_NAME, "nobody", "nfsnobody", "nogroup")) { + log_notice("Unsupported nobody group name '%s', skipping remaining tests in %s", NOBODY_GROUP_NAME, __func__); + return; + } + + test(m, "exec-runtimedirectory-owner-" NOBODY_GROUP_NAME ".service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_GROUP, CLD_EXITED); +} + +static void test_exec_capabilityboundingset(Manager *m) { + int r; + + r = find_executable("capsh", NULL); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find capsh binary: %m", __func__); + return; + } + + if (have_effective_cap(CAP_CHOWN) <= 0 || + have_effective_cap(CAP_FOWNER) <= 0 || + have_effective_cap(CAP_KILL) <= 0) { + log_notice("Skipping %s, this process does not have enough capabilities", __func__); + return; + } + + test(m, "exec-capabilityboundingset-simple.service", 0, CLD_EXITED); + test(m, "exec-capabilityboundingset-reset.service", 0, CLD_EXITED); + test(m, "exec-capabilityboundingset-merge.service", 0, CLD_EXITED); + test(m, "exec-capabilityboundingset-invert.service", 0, CLD_EXITED); +} + +static void test_exec_basic(Manager *m) { + if (MANAGER_IS_SYSTEM(m) || have_userns_privileges()) + test(m, "exec-basic.service", can_unshare || MANAGER_IS_SYSTEM(m) ? 0 : EXIT_NAMESPACE, CLD_EXITED); + else + return (void)log_notice("Skipping %s, do not have user namespace privileges", __func__); +} + +static void test_exec_ambientcapabilities(Manager *m) { + int r; + + /* Check if the kernel has support for ambient capabilities. Run + * the tests only if that's the case. Clearing all ambient + * capabilities is fine, since we are expecting them to be unset + * in the first place for the tests. */ + r = prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_CLEAR_ALL, 0, 0, 0); + if (r < 0 && IN_SET(errno, EINVAL, EOPNOTSUPP, ENOSYS)) { + log_notice("Skipping %s, the kernel does not support ambient capabilities", __func__); + return; + } + + if (have_effective_cap(CAP_CHOWN) <= 0 || + have_effective_cap(CAP_NET_RAW) <= 0) { + log_notice("Skipping %s, this process does not have enough capabilities", __func__); + return; + } + + test(m, "exec-ambientcapabilities.service", 0, CLD_EXITED); + test(m, "exec-ambientcapabilities-merge.service", 0, CLD_EXITED); + + if (have_effective_cap(CAP_SETUID) > 0) + test(m, "exec-ambientcapabilities-dynuser.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED); + + if (!check_nobody_user_and_group()) { + log_notice("nobody user/group is not synthesized or may conflict to other entries, skipping remaining tests in %s", __func__); + return; + } + + if (!STR_IN_SET(NOBODY_USER_NAME, "nobody", "nfsnobody")) { + log_notice("Unsupported nobody user name '%s', skipping remaining tests in %s", NOBODY_USER_NAME, __func__); + return; + } + + test(m, "exec-ambientcapabilities-" NOBODY_USER_NAME ".service", 0, CLD_EXITED); + test(m, "exec-ambientcapabilities-merge-" NOBODY_USER_NAME ".service", 0, CLD_EXITED); +} + +static void test_exec_privatenetwork(Manager *m) { + int r; + + if (!have_net_dummy) + return (void)log_notice("Skipping %s, dummy network interface not available", __func__); + + if (MANAGER_IS_USER(m) && !have_userns_privileges()) + return (void)log_notice("Skipping %s, do not have user namespace privileges", __func__); + + r = find_executable("ip", NULL); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find ip binary: %m", __func__); + return; + } + + test(m, "exec-privatenetwork-yes-privatemounts-no.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_NETWORK : EXIT_FAILURE, CLD_EXITED); + test(m, "exec-privatenetwork-yes-privatemounts-yes.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_NETWORK : EXIT_NAMESPACE, CLD_EXITED); +} + +static void test_exec_networknamespacepath(Manager *m) { + int r; + + if (!have_net_dummy) + return (void)log_notice("Skipping %s, dummy network interface not available", __func__); + + if (!have_netns) + return (void)log_notice("Skipping %s, network namespace not available", __func__); + + if (MANAGER_IS_USER(m) && !have_userns_privileges()) + return (void)log_notice("Skipping %s, do not have user namespace privileges", __func__); + + r = find_executable("ip", NULL); + if (r < 0) { + log_notice_errno(r, "Skipping %s, could not find ip binary: %m", __func__); + return; + } + + test(m, "exec-networknamespacepath-privatemounts-no.service", MANAGER_IS_SYSTEM(m) ? EXIT_SUCCESS : EXIT_FAILURE, CLD_EXITED); + test(m, "exec-networknamespacepath-privatemounts-yes.service", can_unshare ? EXIT_SUCCESS : MANAGER_IS_SYSTEM(m) ? EXIT_FAILURE : EXIT_NAMESPACE, CLD_EXITED); +} + +static void test_exec_oomscoreadjust(Manager *m) { + test(m, "exec-oomscoreadjust-positive.service", 0, CLD_EXITED); + + if (detect_container() > 0) { + log_notice("Testing in container, skipping remaining tests in %s", __func__); + return; + } + test(m, "exec-oomscoreadjust-negative.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_FAILURE, CLD_EXITED); +} + +static void test_exec_ioschedulingclass(Manager *m) { + test(m, "exec-ioschedulingclass-none.service", 0, CLD_EXITED); + test(m, "exec-ioschedulingclass-idle.service", 0, CLD_EXITED); + test(m, "exec-ioschedulingclass-best-effort.service", 0, CLD_EXITED); + + if (detect_container() > 0) { + log_notice("Testing in container, skipping remaining tests in %s", __func__); + return; + } + test(m, "exec-ioschedulingclass-realtime.service", MANAGER_IS_SYSTEM(m) ? 0 : EXIT_IOPRIO, CLD_EXITED); +} + +static void test_exec_unsetenvironment(Manager *m) { + test(m, "exec-unsetenvironment.service", 0, CLD_EXITED); +} + +static void test_exec_specifier(Manager *m) { + test(m, "exec-specifier.service", 0, CLD_EXITED); + if (MANAGER_IS_SYSTEM(m)) + test(m, "exec-specifier-system.service", 0, CLD_EXITED); + else + test(m, "exec-specifier-user.service", 0, CLD_EXITED); + test(m, "exec-specifier@foo-bar.service", 0, CLD_EXITED); + test(m, "exec-specifier-interpolation.service", 0, CLD_EXITED); +} + +static void test_exec_standardinput(Manager *m) { + test(m, "exec-standardinput-data.service", 0, CLD_EXITED); + test(m, "exec-standardinput-file.service", 0, CLD_EXITED); + test(m, "exec-standardinput-file-cat.service", 0, CLD_EXITED); +} + +static void test_exec_standardoutput(Manager *m) { + test(m, "exec-standardoutput-file.service", 0, CLD_EXITED); +} + +static void test_exec_standardoutput_append(Manager *m) { + test(m, "exec-standardoutput-append.service", 0, CLD_EXITED); +} + +static void test_exec_standardoutput_truncate(Manager *m) { + test(m, "exec-standardoutput-truncate.service", 0, CLD_EXITED); +} + +static void test_exec_condition(Manager *m) { + test_service(m, "exec-condition-failed.service", SERVICE_FAILURE_EXIT_CODE); + test_service(m, "exec-condition-skip.service", SERVICE_SKIP_CONDITION); +} + +static void test_exec_umask_namespace(Manager *m) { + /* exec-specifier-credentials-dir.service creates /run/credentials and enables implicit + * InaccessiblePath= for the directory for all later services with mount namespace. */ + if (!is_inaccessible_available()) { + log_notice("Testing without inaccessible, skipping %s", __func__); + return; + } + test(m, "exec-umask-namespace.service", can_unshare ? 0 : MANAGER_IS_SYSTEM(m) ? EXIT_NAMESPACE : EXIT_GROUP, CLD_EXITED); +} + +typedef struct test_entry { + test_function_t f; + const char *name; +} test_entry; + +#define entry(x) {x, #x} + +static void run_tests(RuntimeScope scope, char **patterns) { + _cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL; + _cleanup_free_ char *unit_paths = NULL; + _cleanup_(manager_freep) Manager *m = NULL; + usec_t start, finish; + int r; + + static const test_entry tests[] = { + entry(test_exec_basic), + entry(test_exec_ambientcapabilities), + entry(test_exec_bindpaths), + entry(test_exec_capabilityboundingset), + entry(test_exec_condition), + entry(test_exec_cpuaffinity), + entry(test_exec_credentials), + entry(test_exec_dynamicuser), + entry(test_exec_environment), + entry(test_exec_environmentfile), + entry(test_exec_execsearchpath), + entry(test_exec_execsearchpath_environment), + entry(test_exec_execsearchpath_environment_files), + entry(test_exec_execsearchpath_passenvironment), + entry(test_exec_execsearchpath_specifier), + entry(test_exec_group), + entry(test_exec_ignoresigpipe), + entry(test_exec_inaccessiblepaths), + entry(test_exec_ioschedulingclass), + entry(test_exec_mount_apivfs), + entry(test_exec_networknamespacepath), + entry(test_exec_noexecpaths), + entry(test_exec_oomscoreadjust), + entry(test_exec_passenvironment), + entry(test_exec_personality), + entry(test_exec_privatedevices), + entry(test_exec_privatenetwork), + entry(test_exec_privatetmp), + entry(test_exec_protecthome), + entry(test_exec_protectkernelmodules), + entry(test_exec_readonlypaths), + entry(test_exec_readwritepaths), + entry(test_exec_restrictnamespaces), + entry(test_exec_runtimedirectory), + entry(test_exec_specifier), + entry(test_exec_standardinput), + entry(test_exec_standardoutput), + entry(test_exec_standardoutput_append), + entry(test_exec_standardoutput_truncate), + entry(test_exec_supplementarygroups), + entry(test_exec_systemcallerrornumber), + entry(test_exec_systemcallfilter), + entry(test_exec_systemcallfilter_system), + entry(test_exec_temporaryfilesystem), + entry(test_exec_umask), + entry(test_exec_umask_namespace), + entry(test_exec_unsetenvironment), + entry(test_exec_user), + entry(test_exec_workingdirectory), + {}, + }; + + assert_se(unsetenv("USER") == 0); + assert_se(unsetenv("LOGNAME") == 0); + assert_se(unsetenv("SHELL") == 0); + assert_se(unsetenv("HOME") == 0); + assert_se(unsetenv("TMPDIR") == 0); + + /* Unset VARx, especially, VAR1, VAR2 and VAR3, which are used in the PassEnvironment test cases, + * otherwise (and if they are present in the environment), `manager_default_environment` will copy + * them into the default environment which is passed to each created job, which will make the tests + * that expect those not to be present to fail. */ + assert_se(unsetenv("VAR1") == 0); + assert_se(unsetenv("VAR2") == 0); + assert_se(unsetenv("VAR3") == 0); + assert_se(unsetenv("VAR4") == 0); + assert_se(unsetenv("VAR5") == 0); + + assert_se(runtime_dir = setup_fake_runtime_dir()); + assert_se(user_runtime_unit_dir = path_join(runtime_dir, "systemd/user")); + assert_se(unit_paths = strjoin(PRIVATE_UNIT_DIR, ":", user_runtime_unit_dir)); + assert_se(set_unit_path(unit_paths) >= 0); + + r = manager_new(scope, MANAGER_TEST_RUN_BASIC, &m); + if (manager_errno_skip_test(r)) + return (void) log_tests_skipped_errno(r, "manager_new"); + assert_se(r >= 0); + + m->defaults.std_output = EXEC_OUTPUT_NULL; /* don't rely on host journald */ + assert_se(manager_startup(m, NULL, NULL, NULL) >= 0); + + /* Uncomment below if you want to make debugging logs stored to journal. */ + //manager_override_log_target(m, LOG_TARGET_AUTO); + //manager_override_log_level(m, LOG_DEBUG); + + /* Measure and print the time that it takes to run tests, excluding startup of the manager object, + * to try and measure latency of spawning services */ + n_ran_tests = 0; + start = now(CLOCK_MONOTONIC); + + for (const test_entry *test = tests; test->f; test++) + if (strv_fnmatch_or_empty(patterns, test->name, FNM_NOESCAPE)) + test->f(m); + else + log_info("Skipping %s because it does not match any pattern.", test->name); + + finish = now(CLOCK_MONOTONIC); + + log_info("ran %u tests with %s manager + unshare=%s in: %s", + n_ran_tests, + scope == RUNTIME_SCOPE_SYSTEM ? "system" : "user", + yes_no(can_unshare), + FORMAT_TIMESPAN(finish - start, USEC_PER_MSEC)); +} + +static int prepare_ns(const char *process_name) { + int r; + + r = safe_fork(process_name, + FORK_RESET_SIGNALS | + FORK_CLOSE_ALL_FDS | + FORK_DEATHSIG_SIGTERM | + FORK_WAIT | + FORK_REOPEN_LOG | + FORK_LOG | + FORK_NEW_MOUNTNS | + FORK_MOUNTNS_SLAVE, + NULL); + assert_se(r >= 0); + if (r == 0) { + _cleanup_free_ char *unit_dir = NULL; + + /* Make "/" read-only. */ + assert_se(mount_nofollow_verbose(LOG_DEBUG, NULL, "/", NULL, MS_BIND|MS_REMOUNT|MS_RDONLY, NULL) >= 0); + + /* Creating a new user namespace in the above means all MS_SHARED mounts become MS_SLAVE. + * Let's put them back to MS_SHARED here, since that's what we want as defaults. (This will + * not reconnect propagation, but simply create new peer groups for all our mounts). */ + assert_se(mount_follow_verbose(LOG_DEBUG, NULL, "/", NULL, MS_SHARED|MS_REC, NULL) >= 0); + + assert_se(mkdir_p(PRIVATE_UNIT_DIR, 0755) >= 0); + assert_se(mount_nofollow_verbose(LOG_DEBUG, "tmpfs", PRIVATE_UNIT_DIR, "tmpfs", MS_NOSUID|MS_NODEV, NULL) >= 0); + + /* Copy unit files to make them accessible even when unprivileged. */ + assert_se(get_testdata_dir("test-execute/", &unit_dir) >= 0); + assert_se(copy_directory_at(AT_FDCWD, unit_dir, AT_FDCWD, PRIVATE_UNIT_DIR, COPY_MERGE_EMPTY) >= 0); + + /* Mount tmpfs on the following directories to make not StateDirectory= or friends disturb the host. */ + FOREACH_STRING(p, "/dev/shm", "/root", "/tmp", "/var/tmp", "/var/lib") + assert_se(mount_nofollow_verbose(LOG_DEBUG, "tmpfs", p, "tmpfs", MS_NOSUID|MS_NODEV, NULL) >= 0); + + /* Prepare credstore like tmpfiles.d/credstore.conf for LoadCredential= tests. */ + FOREACH_STRING(p, "/run/credstore", "/run/credstore.encrypted") { + assert_se(mkdir_p(p, 0) >= 0); + assert_se(mount_nofollow_verbose(LOG_DEBUG, "tmpfs", p, "tmpfs", MS_NOSUID|MS_NODEV, "mode=0000") >= 0); + } + + assert_se(write_string_file("/run/credstore/test-execute.load-credential", "foo", WRITE_STRING_FILE_CREATE) >= 0); + } + + return r; +} + +TEST(run_tests_root) { + _cleanup_strv_free_ char **filters = NULL; + + if (!have_namespaces()) + return (void) log_tests_skipped("unshare() is disabled"); + + /* safe_fork() clears saved_argv in the child process. Let's copy it. */ + assert_se(filters = strv_copy(strv_skip(saved_argv, 1))); + + if (prepare_ns("(test-execute-root)") == 0) { + can_unshare = true; + run_tests(RUNTIME_SCOPE_SYSTEM, filters); + _exit(EXIT_SUCCESS); + } +} + +TEST(run_tests_without_unshare) { + if (!have_namespaces()) { + /* unshare() is already filtered. */ + can_unshare = false; + run_tests(RUNTIME_SCOPE_SYSTEM, strv_skip(saved_argv, 1)); + return; + } + +#if HAVE_SECCOMP + _cleanup_strv_free_ char **filters = NULL; + int r; + + /* The following tests are for 1beab8b0d0ff2d7d1436b52d4a0c3d56dc908962. */ + if (!is_seccomp_available()) + return (void) log_tests_skipped("Seccomp not available, cannot run unshare() filtered tests"); + + /* safe_fork() clears saved_argv in the child process. Let's copy it. */ + assert_se(filters = strv_copy(strv_skip(saved_argv, 1))); + + if (prepare_ns("(test-execute-without-unshare)") == 0) { + _cleanup_hashmap_free_ Hashmap *s = NULL; + + r = seccomp_syscall_resolve_name("unshare"); + assert_se(r != __NR_SCMP_ERROR); + assert_se(hashmap_ensure_put(&s, NULL, UINT32_TO_PTR(r + 1), INT_TO_PTR(-1)) >= 0); + assert_se(seccomp_load_syscall_filter_set_raw(SCMP_ACT_ALLOW, s, SCMP_ACT_ERRNO(EOPNOTSUPP), true) >= 0); + + /* Check unshare() is actually filtered. */ + assert_se(unshare(CLONE_NEWNS) < 0); + assert_se(errno == EOPNOTSUPP); + + can_unshare = false; + run_tests(RUNTIME_SCOPE_SYSTEM, filters); + _exit(EXIT_SUCCESS); + } +#else + log_tests_skipped("Built without seccomp support, cannot run unshare() filtered tests"); +#endif +} + +TEST(run_tests_unprivileged) { + _cleanup_strv_free_ char **filters = NULL; + + if (!have_namespaces()) + return (void) log_tests_skipped("unshare() is disabled"); + + /* safe_fork() clears saved_argv in the child process. Let's copy it. */ + assert_se(filters = strv_copy(strv_skip(saved_argv, 1))); + + if (prepare_ns("(test-execute-unprivileged)") == 0) { + assert_se(capability_bounding_set_drop(0, /* right_now = */ true) >= 0); + + can_unshare = false; + run_tests(RUNTIME_SCOPE_USER, filters); + _exit(EXIT_SUCCESS); + } +} + +static int intro(void) { +#if HAS_FEATURE_ADDRESS_SANITIZER + if (strstr_ptr(ci_environment(), "travis") || strstr_ptr(ci_environment(), "github-actions")) + return log_tests_skipped("Running on Travis CI/GH Actions under ASan, see https://github.com/systemd/systemd/issues/10696"); +#endif + /* It is needed otherwise cgroup creation fails */ + if (geteuid() != 0 || have_effective_cap(CAP_SYS_ADMIN) <= 0) + return log_tests_skipped("not privileged"); + + if (enter_cgroup_subroot(NULL) == -ENOMEDIUM) + return log_tests_skipped("cgroupfs not available"); + + if (path_is_read_only_fs("/sys") > 0) + return log_tests_skipped("/sys is mounted read-only"); + + /* Create dummy network interface for testing PrivateNetwork=yes */ + have_net_dummy = system("ip link add dummy-test-exec type dummy") == 0; + + if (have_net_dummy) { + /* Create a network namespace and a dummy interface in it for NetworkNamespacePath= */ + have_netns = system("ip netns add test-execute-netns") == 0; + have_netns = have_netns && system("ip netns exec test-execute-netns ip link add dummy-test-ns type dummy") == 0; + } + + return EXIT_SUCCESS; +} + +static int outro(void) { + if (have_net_dummy) { + (void) system("ip link del dummy-test-exec"); + (void) system("ip netns del test-execute-netns"); + } + + (void) rmdir(PRIVATE_UNIT_DIR); + + return EXIT_SUCCESS; +} + +DEFINE_TEST_MAIN_FULL(LOG_DEBUG, intro, outro); |