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 ([email protected])
6 * Copyright (c) 2018 Cyril Hrubis <[email protected]>
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
20 static int msg_id1 = -1;
21 static int msg_id2 = -1;
22 static int msg_id3 = -1;
23 static int bad_q = -1;
24
25 struct msqid_ds q_buf;
26
libc_msgctl(int msqid,int cmd,void * buf)27 static int libc_msgctl(int msqid, int cmd, void *buf)
28 {
29 return msgctl(msqid, cmd, buf);
30 }
31
sys_msgctl(int msqid,int cmd,void * buf)32 static int sys_msgctl(int msqid, int cmd, void *buf)
33 {
34 return tst_syscall(__NR_msgctl, msqid, cmd, buf);
35 }
36
37 struct 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
59 static 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
verify_msgctl(unsigned int i)69 static 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
setup(void)85 static 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
cleanup(void)106 static 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
120 static 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