1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2004
4 * Copyright (c) Linux Test Project, 2004-2017
5 *
6 * DESCRIPTION
7 * hugeshmget05 - test for EACCES error
8 *
9 * HISTORY
10 * 03/2001 - Written by Wayne Boyer
11 * 04/2004 - Updated by Robbie Williamson
12 */
13
14 #include <sys/types.h>
15 #include <sys/wait.h>
16 #include <limits.h>
17 #include "hugetlb.h"
18
19 static size_t shm_size;
20 static int shm_id_1 = -1;
21 static uid_t ltp_uid;
22 static char *ltp_user = "nobody";
23
24 static void do_child(void);
25
test_hugeshmget(void)26 static void test_hugeshmget(void)
27 {
28 pid_t pid;
29 int status;
30
31 switch (pid = fork()) {
32 case -1:
33 tst_brk(TBROK | TERRNO, "fork");
34 break;
35 case 0:
36 /* set the user ID of the child to the non root user */
37 SAFE_SETUID(ltp_uid);
38 do_child();
39 exit(0);
40 default:
41 /* wait for the child to return */
42 SAFE_WAITPID(pid, &status, 0);
43 }
44 }
45
do_child(void)46 static void do_child(void)
47 {
48 TEST(shmget(shmkey, shm_size, SHM_HUGETLB | SHM_RW));
49 if (TST_RET != -1) {
50 tst_res(TFAIL, "shmget succeeded unexpectedly");
51 return;
52 }
53 if (TST_ERR == EACCES)
54 tst_res(TPASS | TTERRNO, "shmget failed as expected");
55 else
56 tst_res(TFAIL | TTERRNO, "shmget failed unexpectedly "
57 "- expect errno=EACCES, got");
58 }
59
setup(void)60 void setup(void)
61 {
62 long hpage_size;
63
64 if (tst_hugepages == 0)
65 tst_brk(TCONF, "No enough hugepages for testing.");
66
67 hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
68
69 shm_size = hpage_size * tst_hugepages / 2;
70 update_shm_size(&shm_size);
71 shmkey = getipckey();
72 shm_id_1 = shmget(shmkey, shm_size,
73 SHM_HUGETLB | SHM_RW | IPC_CREAT | IPC_EXCL);
74 if (shm_id_1 == -1)
75 tst_brk(TBROK | TERRNO, "shmget #setup");
76
77 /* get the userid for a non-root user */
78 ltp_uid = getuserid(ltp_user);
79 }
80
cleanup(void)81 void cleanup(void)
82 {
83 rm_shm(shm_id_1);
84 }
85
86 static struct tst_test test = {
87 .needs_root = 1,
88 .options = (struct tst_option[]) {
89 {"s:", &nr_opt, "Set the number of the been allocated hugepages"},
90 {}
91 },
92 .setup = setup,
93 .cleanup = cleanup,
94 .test_all = test_hugeshmget,
95 .hugepages = {128, TST_REQUEST},
96 };
97