diff options
| -rw-r--r-- | Makefile.am | 11 | ||||
| -rw-r--r-- | src/shared/seccomp-util.h | 1 | ||||
| -rw-r--r-- | src/test/test-seccomp.c | 103 |
3 files changed, 115 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am index 18a5f4a82a..8ef3b42c41 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1570,6 +1570,11 @@ tests += \ test-acl-util endif +if HAVE_SECCOMP +tests += \ + test-seccomp +endif + EXTRA_DIST += \ test/a.service \ test/basic.target \ @@ -2038,6 +2043,12 @@ test_acl_util_SOURCES = \ test_acl_util_LDADD = \ libsystemd-shared.la +test_seccomp_SOURCES = \ + src/test/test-seccomp.c + +test_seccomp_LDADD = \ + libsystemd-shared.la + test_namespace_LDADD = \ libcore.la diff --git a/src/shared/seccomp-util.h b/src/shared/seccomp-util.h index 667687b14f..8050fc6fbf 100644 --- a/src/shared/seccomp-util.h +++ b/src/shared/seccomp-util.h @@ -20,6 +20,7 @@ ***/ #include <seccomp.h> +#include <stdbool.h> #include <stdint.h> const char* seccomp_arch_to_string(uint32_t c); diff --git a/src/test/test-seccomp.c b/src/test/test-seccomp.c new file mode 100644 index 0000000000..0060ecdf02 --- /dev/null +++ b/src/test/test-seccomp.c @@ -0,0 +1,103 @@ +/*** + 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 <stdlib.h> +#include <sys/eventfd.h> +#include <unistd.h> + +#include "fd-util.h" +#include "macro.h" +#include "process-util.h" +#include "seccomp-util.h" + +static void test_seccomp_arch_to_string(void) { + 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); +} + +static void test_syscall_filter_set_find(void) { + 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; + + if (!is_seccomp_available()) + return; + + if (geteuid() != 0) + 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 (i == SYSCALL_FILTER_SET_DEFAULT) /* if we look at the default set, whitelist instead of blacklist */ + r = seccomp_load_filter_set(SCMP_ACT_ERRNO(EPERM), syscall_filter_sets + i, SCMP_ACT_ALLOW); + else + r = seccomp_load_filter_set(SCMP_ACT_ALLOW, syscall_filter_sets + i, SCMP_ACT_ERRNO(EPERM)); + 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 == EPERM); + else { + assert_se(fd >= 0); + safe_close(fd); + } + + _exit(EXIT_SUCCESS); + } + + assert_se(wait_for_terminate_and_warn(syscall_filter_sets[i].name, pid, true) == EXIT_SUCCESS); + } +} + +int main(int argc, char *argv[]) { + + test_seccomp_arch_to_string(); + test_syscall_filter_set_find(); + test_filter_sets(); + + return 0; +} |