1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) International Business Machines Corp., 2008
4 * Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
5 */
6
7/*\
8 * [Description]
9 *
10 * Clone a process with CLONE_NEWPID flag and check that killing subprocesses
11 * from child namespace will raise ESRCH error.
12 */
13
14#include "tst_test.h"
15#include "lapi/sched.h"
16
17static void child_func(void)
18{
19	pid_t cpid = tst_getpid();
20	pid_t ppid = getppid();
21
22	TST_EXP_EQ_LI(cpid, 1);
23	TST_EXP_EQ_LI(ppid, 0);
24
25	tst_res(TINFO, "Trying to kill all subprocesses from within container");
26
27	TST_EXP_FAIL(kill(-1, SIGKILL), ESRCH);
28}
29
30static void run(void)
31{
32	const struct tst_clone_args args = {
33		.flags = CLONE_NEWPID,
34		.exit_signal = SIGCHLD,
35	};
36
37	if (!SAFE_CLONE(&args)) {
38		child_func();
39		return;
40	}
41}
42
43static struct tst_test test = {
44	.test_all = run,
45	.needs_root = 1,
46	.forks_child = 1,
47};
48