1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2004
4 * Copyright (c) Linux Test Project, 2004-2020
5 */
6
7 /*
8 * DESCRIPTION
9 * hugeshmctl02 - check for EACCES, EFAULT and EINVAL errors
10 *
11 * ALGORITHM
12 * create a large shared memory segment without read or write permissions
13 * create a large shared memory segment with read & write permissions
14 * loop if that option was specified
15 * call shmctl() using five different invalid cases
16 * check the errno value
17 * issue a PASS message if we get EACCES, EFAULT or EINVAL
18 * otherwise, the tests fails
19 * issue a FAIL message
20 * call cleanup
21 *
22 * HISTORY
23 * 03/2001 - Written by Wayne Boyer
24 * 04/2004 - Updated by Robbie Williamson
25 */
26
27 #include <pwd.h>
28 #include <limits.h>
29 #include "hugetlb.h"
30 #include "lapi/syscalls.h"
31
32 static size_t shm_size;
33 static int shm_id_1 = -1;
34 static int shm_id_2 = -1;
35 static int shm_id_3 = -1;
36 static struct shmid_ds buf;
37
38 static struct tcase {
39 int *shmid;
40 int cmd;
41 struct shmid_ds *sbuf;
42 int error;
43 } tcases[] = {
44 /* EFAULT - IPC_SET & buf isn't valid */
45 {&shm_id_2, IPC_SET, (struct shmid_ds *)-1, EFAULT},
46 /* EFAULT - IPC_STAT & buf isn't valid */
47 {&shm_id_2, IPC_STAT, (struct shmid_ds *)-1, EFAULT},
48 /* EINVAL - the shmid is not valid */
49 {&shm_id_3, IPC_STAT, &buf, EINVAL},
50 /* EINVAL - the command is not valid */
51 {&shm_id_2, -1, &buf, EINVAL},
52 };
53
libc_shmctl(int shmid,int cmd,void * buf)54 static int libc_shmctl(int shmid, int cmd, void *buf)
55 {
56 return shmctl(shmid, cmd, buf);
57 }
58
sys_shmctl(int shmid,int cmd,void * buf)59 static int sys_shmctl(int shmid, int cmd, void *buf)
60 {
61 return tst_syscall(__NR_shmctl, shmid, cmd, buf);
62 }
63
64 static struct test_variants
65 {
66 int (*shmctl)(int shmid, int cmd, void *buf);
67 char *desc;
68 } variants[] = {
69 { .shmctl = libc_shmctl, .desc = "libc shmctl()"},
70 #if (__NR_shmctl != __LTP__NR_INVALID_SYSCALL)
71 { .shmctl = sys_shmctl, .desc = "__NR_shmctl syscall"},
72 #endif
73 };
74
test_hugeshmctl(unsigned int i)75 static void test_hugeshmctl(unsigned int i)
76 {
77 struct test_variants *tv = &variants[tst_variant];
78
79 if (tcases[i].error == EFAULT && tv->shmctl == libc_shmctl) {
80 tst_res(TCONF, "EFAULT is skipped for libc variant");
81 return;
82 }
83
84 TEST(tv->shmctl(*(tcases[i].shmid), tcases[i].cmd, tcases[i].sbuf));
85 if (TST_RET != -1) {
86 tst_res(TFAIL, "shmctl succeeded unexpectedly");
87 return;
88 }
89
90 if (TST_ERR == tcases[i].error) {
91 tst_res(TPASS | TTERRNO, "shmctl failed as expected");
92 return;
93 }
94
95 tst_res(TFAIL | TTERRNO,
96 "shmctl failed unexpectedly - expect errno = %d, got",
97 tcases[i].error);
98 }
99
setup(void)100 static void setup(void)
101 {
102 struct test_variants *tv = &variants[tst_variant];
103 long hpage_size;
104
105 tst_res(TINFO, "Testing variant: %s", tv->desc);
106
107 if (tst_hugepages == 0)
108 tst_brk(TCONF, "No enough hugepages for testing.");
109
110 hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
111
112 shm_size = hpage_size * (tst_hugepages / 2);
113 update_shm_size(&shm_size);
114 shmkey = getipckey();
115
116 /* create a shared memory segment without read or write permissions */
117 shm_id_1 = shmget(shmkey, shm_size, SHM_HUGETLB | IPC_CREAT | IPC_EXCL);
118 if (shm_id_1 == -1)
119 tst_brk(TBROK | TERRNO, "shmget #1");
120
121 /* create a shared memory segment with read and write permissions */
122 shm_id_2 = shmget(shmkey + 1, shm_size,
123 SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
124 if (shm_id_2 == -1)
125 tst_brk(TBROK | TERRNO, "shmget #2");
126 }
127
cleanup(void)128 static void cleanup(void)
129 {
130 rm_shm(shm_id_1);
131 rm_shm(shm_id_2);
132 }
133
134 static struct tst_test test = {
135 .test = test_hugeshmctl,
136 .test_variants = ARRAY_SIZE(variants),
137 .tcnt = ARRAY_SIZE(tcases),
138 .needs_root = 1,
139 .needs_tmpdir = 1,
140 .options = (struct tst_option[]) {
141 {"s:", &nr_opt, "Set the number of the been allocated hugepages"},
142 {}
143 },
144 .setup = setup,
145 .cleanup = cleanup,
146 .hugepages = {128, TST_REQUEST},
147 };
148