1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) Bull S.A. 2001
4 * Copyright (c) International Business Machines Corp., 2001
5 * Copyright (c) Linux Test Project, 2003-2023
6 * 07/2001 Ported by Wayne Boyer
7 * 05/2002 Ported by Andre Merlier
8 */
9
10 /*\
11 * [Description]
12 *
13 * Test for EINVAL, EPERM, EFAULT errors.
14 *
15 * - setgroups() fails with EINVAL if the size argument value is > NGROUPS.
16 *
17 * - setgroups() fails with EPERM if the calling process is not super-user.
18 *
19 * - setgroups() fails with EFAULT if the list has an invalid address.
20 */
21
22 #include <pwd.h>
23 #include <stdlib.h>
24
25 #include "tst_test.h"
26 #include "compat_tst_16.h"
27
28 #define TESTUSER "nobody"
29
30 static GID_T *glist1, *glist2, *glist3;
31 static struct passwd *user_info;
32
33 static struct tcase {
34 int gsize;
35 GID_T **glist;
36 int exp_errno;
37 } tcases[] = {
38 {NGROUPS + 1, &glist1, EINVAL},
39 {1, &glist2, EPERM},
40 {NGROUPS, &glist3, EFAULT},
41 };
42
verify_setgroups(unsigned int i)43 static void verify_setgroups(unsigned int i)
44 {
45 struct tcase *tc = &tcases[i];
46
47 if (tc->exp_errno == EPERM)
48 SAFE_SETEUID(user_info->pw_uid);
49
50 TST_EXP_FAIL(SETGROUPS(tc->gsize, *tc->glist), tc->exp_errno,
51 "setgroups(%d, groups_list)", tc->gsize);
52
53 if (tc->exp_errno == EPERM)
54 SAFE_SETEUID(0);
55 }
56
setup(void)57 static void setup(void)
58 {
59 user_info = SAFE_GETPWNAM(TESTUSER);
60 glist2[0] = 42;
61 glist3 = tst_get_bad_addr(NULL);
62 }
63
64 static struct tst_test test = {
65 .test = verify_setgroups,
66 .tcnt = ARRAY_SIZE(tcases),
67 .bufs = (struct tst_buffers []) {
68 {&glist1, .size = sizeof(GID_T) * (NGROUPS + 1)},
69 {&glist2, .size = sizeof(GID_T)},
70 {&user_info, .size = sizeof(struct passwd)},
71 {},
72 },
73 .setup = setup,
74 .needs_root = 1,
75 };
76