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/***
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"
#include "string-util.h"
#include "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_architecture_table(void) {
const char *n, *n2;
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) {
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_architecture_table();
test_syscall_filter_set_find();
test_filter_sets();
return 0;
}
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