1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) International Business Machines Corp., 2001
4 *    03/2001 - Written by Wayne Boyer
5 *    12/03/2008 Matthieu Fertré (Matthieu.Fertre@irisa.fr)
6 * Copyright (c) 2018 Cyril Hrubis <chrubis@suse.cz>
7 */
8/*
9 * Test for EACCES, EFAULT and EINVAL errors using a variety of incorrect
10 * calls.
11 */
12#include <errno.h>
13#include <pwd.h>
14
15#include "tst_test.h"
16#include "tst_safe_sysv_ipc.h"
17#include "libnewipc.h"
18#include "lapi/syscalls.h"
19
20static int msg_id1 = -1;
21static int msg_id2 = -1;
22static int msg_id3 = -1;
23static int bad_q = -1;
24
25struct msqid_ds q_buf;
26
27static int libc_msgctl(int msqid, int cmd, void *buf)
28{
29	return msgctl(msqid, cmd, buf);
30}
31
32static int sys_msgctl(int msqid, int cmd, void *buf)
33{
34	return tst_syscall(__NR_msgctl, msqid, cmd, buf);
35}
36
37struct tcase {
38	int *msg_id;
39	int cmd;
40	struct msqid_ds *buf;
41	int error;
42} tc[] = {
43	/* EACCES - there is no read permission for the queue */
44	{&msg_id1, IPC_STAT, &q_buf, EACCES},
45	/* EFAULT - the structure address is invalid - IPC_STAT */
46	{&msg_id2, IPC_STAT, (struct msqid_ds *)-1, EFAULT},
47	/* EFAULT - the structure address is invalid - IPC_SET */
48	{&msg_id2, IPC_SET, (struct msqid_ds *)-1, EFAULT},
49	/* EINVAL - the command (-1) is invalid */
50	{&msg_id2, -1, &q_buf, EINVAL},
51	/* EINVAL - the queue id is invalid - IPC_STAT */
52	{&bad_q, IPC_STAT, &q_buf, EINVAL},
53	/* EINVAL - the queue id is invalid - IPC_SET */
54	{&bad_q, IPC_SET, &q_buf, EINVAL},
55	/* EPERM - cannot delete root owned queue */
56	{&msg_id3, IPC_RMID, NULL, EPERM},
57};
58
59static struct test_variants {
60	int (*msgctl)(int msqid, int cmd, void *buf);
61	char *desc;
62} variants[] = {
63	{ .msgctl = libc_msgctl, .desc = "libc msgctl()"},
64#if (__NR_msgctl != __LTP__NR_INVALID_SYSCALL)
65	{ .msgctl = sys_msgctl,  .desc = "__NR_msgctl syscall"},
66#endif
67};
68
69static void verify_msgctl(unsigned int i)
70{
71	struct test_variants *tv = &variants[tst_variant];
72
73	if (tc[i].error == EFAULT &&
74		tv->msgctl == libc_msgctl) {
75		tst_res(TCONF, "EFAULT is skipped for libc variant");
76		return;
77	}
78
79	TST_EXP_FAIL(tv->msgctl(*(tc[i].msg_id), tc[i].cmd, tc[i].buf),
80	             tc[i].error,
81	             "msgctl(%i, %i, %p)",
82	             *(tc[i].msg_id), tc[i].cmd, tc[i].buf);
83}
84
85static void setup(void)
86{
87	struct test_variants *tv = &variants[tst_variant];
88
89	key_t msgkey1, msgkey2;
90	struct passwd *ltpuser;
91
92	msg_id3 = SAFE_MSGGET(IPC_PRIVATE, IPC_CREAT | MSG_RW);
93
94	ltpuser = SAFE_GETPWNAM("nobody");
95	SAFE_SETEUID(ltpuser->pw_uid);
96
97	msgkey1 = GETIPCKEY();
98	msgkey2 = GETIPCKEY();
99
100	msg_id1 = SAFE_MSGGET(msgkey1, IPC_CREAT | IPC_EXCL);
101	msg_id2 = SAFE_MSGGET(msgkey2, IPC_CREAT | IPC_EXCL | MSG_RD | MSG_WR);
102
103	tst_res(TINFO, "Testing variant: %s", tv->desc);
104}
105
106static void cleanup(void)
107{
108	if (msg_id1 >= 0)
109		SAFE_MSGCTL(msg_id1, IPC_RMID, NULL);
110
111	if (msg_id2 >= 0)
112		SAFE_MSGCTL(msg_id2, IPC_RMID, NULL);
113
114	if (msg_id3 >= 0) {
115		SAFE_SETEUID(0);
116		SAFE_MSGCTL(msg_id3, IPC_RMID, NULL);
117	}
118}
119
120static struct tst_test test = {
121	.setup = setup,
122	.cleanup = cleanup,
123	.test = verify_msgctl,
124	.tcnt = ARRAY_SIZE(tc),
125	.test_variants = ARRAY_SIZE(variants),
126	.needs_tmpdir = 1,
127	.needs_root = 1,
128};
129