1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2015 Author: Gabriellla Schmidt <gsc@bruker.de>
4 * Modify: Li Wang <liwang@redhat.com>
5 * A regression test for:
6 * commit e7ca2552369c1dfe0216c626baf82c3d83ec36bb
7 * Author: Mateusz Guzik <mguzik@redhat.com>
8 * Date: Mon Jan 27 17:07:11 2014 -0800
9 *
10 * ipc: fix compat msgrcv with negative msgtyp
11 *
12 * Reproduce:
13 *
14 * 32-bit application using the msgrcv() system call
15 * gives the error message:
16 *
17 * msgrcv: No message of desired type
18 *
19 * If this progarm is compiled as 64-bit application it works.
20 */
21
22 #include <stdio.h>
23 #include <string.h>
24 #include <unistd.h>
25 #include <sys/types.h>
26 #include <sys/ipc.h>
27 #include <sys/msg.h>
28 #include "tst_test.h"
29 #include "tst_safe_sysv_ipc.h"
30 #include "libnewipc.h"
31
32 static long mtype = 121;
33 static key_t msgkey;
34 static int queue_id = -1;
35 static struct mbuf {
36 long mtype;
37 char mtext[16];
38 } rcv_buf, snd_buf = {121, "hello"};
39
verify_msgrcv(void)40 static void verify_msgrcv(void)
41 {
42 memset(&rcv_buf, 0, sizeof(rcv_buf));
43 SAFE_MSGSND(queue_id, &snd_buf, sizeof(snd_buf.mtext), IPC_NOWAIT);
44
45 TEST(msgrcv(queue_id, &rcv_buf, sizeof(rcv_buf.mtext), -mtype, IPC_NOWAIT | MSG_NOERROR));
46 if (TST_RET == -1) {
47 tst_res(TFAIL, "Bug: No message of desired type.");
48 return;
49 }
50
51 if (rcv_buf.mtype != mtype) {
52 tst_res(TFAIL, "found mtype %ld, expected %ld", rcv_buf.mtype, mtype);
53 return;
54 }
55 if ((size_t)TST_RET != sizeof(snd_buf.mtext)) {
56 tst_res(TFAIL, "received %zi, expected %zu", (size_t)TST_RET, sizeof(snd_buf.mtext));
57 return;
58 }
59
60 tst_res(TPASS, "No regression found.");
61 }
62
setup(void)63 static void setup(void)
64 {
65 msgkey = GETIPCKEY();
66 queue_id = SAFE_MSGGET(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW);
67 }
68
cleanup(void)69 static void cleanup(void)
70 {
71 if (queue_id != -1)
72 SAFE_MSGCTL(queue_id, IPC_RMID, NULL);
73 }
74
75 static struct tst_test test = {
76 .needs_tmpdir = 1,
77 .setup = setup,
78 .cleanup = cleanup,
79 .test_all = verify_msgrcv,
80 .tags = (const struct tst_tag[]) {
81 {"linux-git", "e7ca2552369c"},
82 {}
83 }
84 };
85