104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/***
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This file is part of systemd.
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Copyright 2016 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdlib.h>
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#include <sys/eventfd.h>
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#include <unistd.h>
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#include "fd-util.h"
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#include "macro.h"
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#include "process-util.h"
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#include "seccomp-util.h"
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static void test_seccomp_arch_to_string(void) {
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uint32_t a, b;
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const char *name;
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a = seccomp_arch_native();
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assert_se(a > 0);
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name = seccomp_arch_to_string(a);
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assert_se(name);
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assert_se(seccomp_arch_from_string(name, &b) >= 0);
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assert_se(a == b);
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}
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static void test_syscall_filter_set_find(void) {
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assert_se(!syscall_filter_set_find(NULL));
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assert_se(!syscall_filter_set_find(""));
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assert_se(!syscall_filter_set_find("quux"));
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assert_se(!syscall_filter_set_find("@quux"));
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assert_se(syscall_filter_set_find("@clock") == syscall_filter_sets + SYSCALL_FILTER_SET_CLOCK);
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assert_se(syscall_filter_set_find("@default") == syscall_filter_sets + SYSCALL_FILTER_SET_DEFAULT);
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assert_se(syscall_filter_set_find("@raw-io") == syscall_filter_sets + SYSCALL_FILTER_SET_RAW_IO);
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}
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static void test_filter_sets(void) {
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unsigned i;
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int r;
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if (!is_seccomp_available())
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return;
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if (geteuid() != 0)
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return;
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for (i = 0; i < _SYSCALL_FILTER_SET_MAX; i++) {
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pid_t pid;
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log_info("Testing %s", syscall_filter_sets[i].name);
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pid = fork();
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assert_se(pid >= 0);
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if (pid == 0) { /* Child? */
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int fd;
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if (i == SYSCALL_FILTER_SET_DEFAULT) /* if we look at the default set, whitelist instead of blacklist */
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r = seccomp_load_filter_set(SCMP_ACT_ERRNO(EPERM), syscall_filter_sets + i, SCMP_ACT_ALLOW);
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else
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r = seccomp_load_filter_set(SCMP_ACT_ALLOW, syscall_filter_sets + i, SCMP_ACT_ERRNO(EPERM));
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if (r < 0)
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_exit(EXIT_FAILURE);
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/* Test the sycall filter with one random system call */
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fd = eventfd(0, EFD_NONBLOCK|EFD_CLOEXEC);
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if (IN_SET(i, SYSCALL_FILTER_SET_IO_EVENT, SYSCALL_FILTER_SET_DEFAULT))
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assert_se(fd < 0 && errno == EPERM);
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else {
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assert_se(fd >= 0);
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safe_close(fd);
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}
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_exit(EXIT_SUCCESS);
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}
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assert_se(wait_for_terminate_and_warn(syscall_filter_sets[i].name, pid, true) == EXIT_SUCCESS);
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}
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}
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int main(int argc, char *argv[]) {
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test_seccomp_arch_to_string();
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test_syscall_filter_set_find();
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test_filter_sets();
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return 0;
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}
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