196 lines
5.2 KiB
C
196 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
/* Based on Christian Brauner's clone3() example */
|
|
|
|
#define _GNU_SOURCE
|
|
#include <errno.h>
|
|
#include <inttypes.h>
|
|
#include <linux/types.h>
|
|
#include <linux/sched.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/types.h>
|
|
#include <sys/un.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
#include <sched.h>
|
|
|
|
#include "../kselftest.h"
|
|
#include "clone3_selftests.h"
|
|
|
|
enum test_mode {
|
|
CLONE3_ARGS_NO_TEST,
|
|
CLONE3_ARGS_ALL_0,
|
|
CLONE3_ARGS_INVAL_EXIT_SIGNAL_BIG,
|
|
CLONE3_ARGS_INVAL_EXIT_SIGNAL_NEG,
|
|
CLONE3_ARGS_INVAL_EXIT_SIGNAL_CSIG,
|
|
CLONE3_ARGS_INVAL_EXIT_SIGNAL_NSIG,
|
|
};
|
|
|
|
static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode)
|
|
{
|
|
struct __clone_args args = {
|
|
.flags = flags,
|
|
.exit_signal = SIGCHLD,
|
|
};
|
|
|
|
struct clone_args_extended {
|
|
struct __clone_args args;
|
|
__aligned_u64 excess_space[2];
|
|
} args_ext;
|
|
|
|
pid_t pid = -1;
|
|
int status;
|
|
|
|
memset(&args_ext, 0, sizeof(args_ext));
|
|
if (size > sizeof(struct __clone_args))
|
|
args_ext.excess_space[1] = 1;
|
|
|
|
if (size == 0)
|
|
size = sizeof(struct __clone_args);
|
|
|
|
switch (test_mode) {
|
|
case CLONE3_ARGS_ALL_0:
|
|
args.flags = 0;
|
|
args.exit_signal = 0;
|
|
break;
|
|
case CLONE3_ARGS_INVAL_EXIT_SIGNAL_BIG:
|
|
args.exit_signal = 0xbadc0ded00000000ULL;
|
|
break;
|
|
case CLONE3_ARGS_INVAL_EXIT_SIGNAL_NEG:
|
|
args.exit_signal = 0x0000000080000000ULL;
|
|
break;
|
|
case CLONE3_ARGS_INVAL_EXIT_SIGNAL_CSIG:
|
|
args.exit_signal = 0x0000000000000100ULL;
|
|
break;
|
|
case CLONE3_ARGS_INVAL_EXIT_SIGNAL_NSIG:
|
|
args.exit_signal = 0x00000000000000f0ULL;
|
|
break;
|
|
}
|
|
|
|
memcpy(&args_ext.args, &args, sizeof(struct __clone_args));
|
|
|
|
pid = sys_clone3((struct __clone_args *)&args_ext, size);
|
|
if (pid < 0) {
|
|
ksft_print_msg("%s - Failed to create new process\n",
|
|
strerror(errno));
|
|
return -errno;
|
|
}
|
|
|
|
if (pid == 0) {
|
|
ksft_print_msg("I am the child, my PID is %d\n", getpid());
|
|
_exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
ksft_print_msg("I am the parent (%d). My child's pid is %d\n",
|
|
getpid(), pid);
|
|
|
|
if (waitpid(-1, &status, __WALL) < 0) {
|
|
ksft_print_msg("Child returned %s\n", strerror(errno));
|
|
return -errno;
|
|
}
|
|
if (WEXITSTATUS(status))
|
|
return WEXITSTATUS(status);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void test_clone3(uint64_t flags, size_t size, int expected,
|
|
enum test_mode test_mode)
|
|
{
|
|
int ret;
|
|
|
|
ksft_print_msg(
|
|
"[%d] Trying clone3() with flags %#" PRIx64 " (size %zu)\n",
|
|
getpid(), flags, size);
|
|
ret = call_clone3(flags, size, test_mode);
|
|
ksft_print_msg("[%d] clone3() with flags says: %d expected %d\n",
|
|
getpid(), ret, expected);
|
|
if (ret != expected)
|
|
ksft_test_result_fail(
|
|
"[%d] Result (%d) is different than expected (%d)\n",
|
|
getpid(), ret, expected);
|
|
else
|
|
ksft_test_result_pass(
|
|
"[%d] Result (%d) matches expectation (%d)\n",
|
|
getpid(), ret, expected);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
pid_t pid;
|
|
|
|
uid_t uid = getuid();
|
|
|
|
ksft_print_header();
|
|
ksft_set_plan(17);
|
|
test_clone3_supported();
|
|
|
|
/* Just a simple clone3() should return 0.*/
|
|
test_clone3(0, 0, 0, CLONE3_ARGS_NO_TEST);
|
|
|
|
/* Do a clone3() in a new PID NS.*/
|
|
if (uid == 0)
|
|
test_clone3(CLONE_NEWPID, 0, 0, CLONE3_ARGS_NO_TEST);
|
|
else
|
|
ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n");
|
|
|
|
/* Do a clone3() with CLONE_ARGS_SIZE_VER0. */
|
|
test_clone3(0, CLONE_ARGS_SIZE_VER0, 0, CLONE3_ARGS_NO_TEST);
|
|
|
|
/* Do a clone3() with CLONE_ARGS_SIZE_VER0 - 8 */
|
|
test_clone3(0, CLONE_ARGS_SIZE_VER0 - 8, -EINVAL, CLONE3_ARGS_NO_TEST);
|
|
|
|
/* Do a clone3() with sizeof(struct clone_args) + 8 */
|
|
test_clone3(0, sizeof(struct __clone_args) + 8, 0, CLONE3_ARGS_NO_TEST);
|
|
|
|
/* Do a clone3() with exit_signal having highest 32 bits non-zero */
|
|
test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_BIG);
|
|
|
|
/* Do a clone3() with negative 32-bit exit_signal */
|
|
test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_NEG);
|
|
|
|
/* Do a clone3() with exit_signal not fitting into CSIGNAL mask */
|
|
test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_CSIG);
|
|
|
|
/* Do a clone3() with NSIG < exit_signal < CSIG */
|
|
test_clone3(0, 0, -EINVAL, CLONE3_ARGS_INVAL_EXIT_SIGNAL_NSIG);
|
|
|
|
test_clone3(0, sizeof(struct __clone_args) + 8, 0, CLONE3_ARGS_ALL_0);
|
|
|
|
test_clone3(0, sizeof(struct __clone_args) + 16, -E2BIG,
|
|
CLONE3_ARGS_ALL_0);
|
|
|
|
test_clone3(0, sizeof(struct __clone_args) * 2, -E2BIG,
|
|
CLONE3_ARGS_ALL_0);
|
|
|
|
/* Do a clone3() with > page size */
|
|
test_clone3(0, getpagesize() + 8, -E2BIG, CLONE3_ARGS_NO_TEST);
|
|
|
|
/* Do a clone3() with CLONE_ARGS_SIZE_VER0 in a new PID NS. */
|
|
if (uid == 0)
|
|
test_clone3(CLONE_NEWPID, CLONE_ARGS_SIZE_VER0, 0,
|
|
CLONE3_ARGS_NO_TEST);
|
|
else
|
|
ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n");
|
|
|
|
/* Do a clone3() with CLONE_ARGS_SIZE_VER0 - 8 in a new PID NS */
|
|
test_clone3(CLONE_NEWPID, CLONE_ARGS_SIZE_VER0 - 8, -EINVAL,
|
|
CLONE3_ARGS_NO_TEST);
|
|
|
|
/* Do a clone3() with sizeof(struct clone_args) + 8 in a new PID NS */
|
|
if (uid == 0)
|
|
test_clone3(CLONE_NEWPID, sizeof(struct __clone_args) + 8, 0,
|
|
CLONE3_ARGS_NO_TEST);
|
|
else
|
|
ksft_test_result_skip("Skipping clone3() with CLONE_NEWPID\n");
|
|
|
|
/* Do a clone3() with > page size in a new PID NS */
|
|
test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
|
|
CLONE3_ARGS_NO_TEST);
|
|
|
|
return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
|
|
}
|