1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2019 Federico Bonfiglio fedebonfi95@gmail.com
4 */
5
6 /*
7 * Test ioctl_ns with NS_GET_USERNS request.
8 *
9 * Owning user namespace of process calling ioctl is out of scope,
10 * which should make the call fail with EPERM.
11 *
12 */
13 #define _GNU_SOURCE
14
15 #include <errno.h>
16 #include "tst_test.h"
17 #include "lapi/ioctl_ns.h"
18
setup(void)19 static void setup(void)
20 {
21 int exists = access("/proc/self/ns/user", F_OK);
22
23 if (exists < 0)
24 tst_res(TCONF, "namespace not available");
25 }
26
run(void)27 static void run(void)
28 {
29 int fd, parent_fd;
30
31 fd = SAFE_OPEN("/proc/self/ns/user", O_RDONLY);
32 parent_fd = ioctl(fd, NS_GET_USERNS);
33 if (parent_fd == -1) {
34 if (errno == ENOTTY)
35 tst_brk(TCONF, "ioctl(NS_GET_USERNS) not implemented");
36
37 if (errno == EPERM)
38 tst_res(TPASS, "NS_GET_USERNS fails with EPERM");
39 else
40 tst_res(TFAIL | TERRNO, "unexpected ioctl error");
41 } else {
42 SAFE_CLOSE(fd);
43 tst_res(TFAIL, "call to ioctl succeded");
44 }
45 }
46
47 static struct tst_test test = {
48 .test_all = run,
49 .min_kver = "4.9",
50 .setup = setup
51 };
52