1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 */
5
6 /*
7 * DESCRIPTION
8 * 1) The calling process does not have write permission on the message
9 * queue, so msgsnd(2) fails and sets errno to EACCES.
10 * 2) msgsnd(2) fails and sets errno to EFAULT if the message buffer address
11 * is invalid.
12 * 3) msgsnd(2) fails and sets errno to EINVAL if the queue ID is invalid.
13 * 4) msgsnd(2) fails and sets errno to EINVAL if the message type is not
14 * positive (0).
15 * 5) msgsnd(2) fails and sets errno to EINVAL if the message type is not
16 * positive (>0).
17 * 6) msgsnd(2) fails and sets errno to EINVAL if the message size is less
18 * than zero.
19 */
20
21 #include <errno.h>
22 #include <string.h>
23 #include <stdlib.h>
24 #include <sys/types.h>
25 #include <sys/ipc.h>
26 #include <sys/msg.h>
27 #include <pwd.h>
28
29 #include "tst_test.h"
30 #include "tst_safe_sysv_ipc.h"
31 #include "libnewipc.h"
32
33 static key_t msgkey;
34 static int queue_id = -1;
35 static int bad_id = -1;
36 static struct passwd *pw;
37 static struct buf {
38 long type;
39 char text[MSGSIZE];
40 } snd_buf[] = {
41 {1, "hello"},
42 {0, "hello"},
43 {-1, "hello"}
44 };
45
46 static struct tcase {
47 int *id;
48 struct buf *buffer;
49 int msgsz;
50 int exp_err;
51 /*1: nobody expected 0: root expected */
52 int exp_user;
53 } tcases[] = {
54 {&queue_id, &snd_buf[0], MSGSIZE, EACCES, 1},
55 {&queue_id, NULL, MSGSIZE, EFAULT, 0},
56 {&bad_id, &snd_buf[0], MSGSIZE, EINVAL, 0},
57 {&queue_id, &snd_buf[1], MSGSIZE, EINVAL, 0},
58 {&queue_id, &snd_buf[2], MSGSIZE, EINVAL, 0},
59 {&queue_id, &snd_buf[0], -1, EINVAL, 0}
60 };
61
verify_msgsnd(struct tcase * tc)62 static void verify_msgsnd(struct tcase *tc)
63 {
64 TEST(msgsnd(*tc->id, tc->buffer, tc->msgsz, 0));
65 if (TST_RET != -1) {
66 tst_res(TFAIL, "smgsnd() succeeded unexpectedly");
67 return;
68 }
69
70 if (TST_ERR == tc->exp_err) {
71 tst_res(TPASS | TTERRNO, "msgsnd() failed as expected");
72 } else {
73 tst_res(TFAIL | TTERRNO, "msgsnd() failed unexpectedly,"
74 " expected %s", tst_strerrno(tc->exp_err));
75 }
76 }
77
do_test(unsigned int n)78 static void do_test(unsigned int n)
79 {
80 pid_t pid;
81 struct tcase *tc = &tcases[n];
82
83 if (tc->exp_user == 0) {
84 verify_msgsnd(tc);
85 return;
86 }
87
88 pid = SAFE_FORK();
89 if (pid) {
90 tst_reap_children();
91 } else {
92 SAFE_SETUID(pw->pw_uid);
93 verify_msgsnd(tc);
94 }
95 }
96
setup(void)97 static void setup(void)
98 {
99 msgkey = GETIPCKEY();
100
101 queue_id = SAFE_MSGGET(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW);
102
103 pw = SAFE_GETPWNAM("nobody");
104 }
105
cleanup(void)106 static void cleanup(void)
107 {
108 if (queue_id != -1)
109 SAFE_MSGCTL(queue_id, IPC_RMID, NULL);
110 }
111
112 static struct tst_test test = {
113 .needs_tmpdir = 1,
114 .needs_root = 1,
115 .forks_child = 1,
116 .tcnt = ARRAY_SIZE(tcases),
117 .setup = setup,
118 .cleanup = cleanup,
119 .test = do_test
120 };
121