1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * 07/2001 Ported by Wayne Boyer
5 * Copyright (c) 2023 SUSE LLC Avinesh Kumar <[email protected]>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Verify that, mmap() call fails with errno:
12 *
13 * - EACCES, when a file mapping is requested but the file descriptor is not open for reading.
14 * - EINVAL, when length argument is 0.
15 * - EINVAL, when flags contains none of MAP_PRIVATE, MAP_SHARED, or MAP_SHARED_VALIDATE.
16 */
17
18 #include <stdlib.h>
19 #include "tst_test.h"
20
21 #define MMAPSIZE 1024
22 #define TEMPFILE "mmapfile"
23 static size_t page_sz;
24 static int fd;
25
26 static struct tcase {
27 size_t length;
28 int prot;
29 int flags;
30 int exp_errno;
31 } tcases[] = {
32 {MMAPSIZE, PROT_WRITE, MAP_FILE | MAP_PRIVATE, EACCES},
33 {MMAPSIZE, PROT_WRITE, MAP_FILE | MAP_SHARED, EACCES},
34 {MMAPSIZE, PROT_READ, MAP_FILE | MAP_PRIVATE, EACCES},
35 {MMAPSIZE, PROT_READ, MAP_FILE | MAP_SHARED, EACCES},
36 {MMAPSIZE, PROT_READ | PROT_WRITE, MAP_FILE | MAP_PRIVATE, EACCES},
37 {MMAPSIZE, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, EACCES},
38 {0, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, EINVAL},
39 {MMAPSIZE, PROT_READ | PROT_WRITE, MAP_FILE, EINVAL}
40 };
41
setup(void)42 static void setup(void)
43 {
44 char *buf;
45
46 page_sz = getpagesize();
47 buf = SAFE_MALLOC(page_sz);
48 memset(buf, 'A', page_sz);
49
50 fd = SAFE_OPEN(TEMPFILE, O_WRONLY | O_CREAT, 0666);
51 SAFE_WRITE(SAFE_WRITE_ALL, fd, buf, page_sz);
52 free(buf);
53 }
54
run(unsigned int i)55 static void run(unsigned int i)
56 {
57 struct tcase *tc = &tcases[i];
58
59 TST_EXP_FAIL_PTR_VOID(mmap(NULL, tc->length, tc->prot, tc->flags, fd, 0), tc->exp_errno);
60
61 if (TST_RET_PTR != MAP_FAILED)
62 SAFE_MUNMAP(TST_RET_PTR, page_sz);
63 }
64
cleanup(void)65 static void cleanup(void)
66 {
67 if (fd > 0)
68 SAFE_CLOSE(fd);
69 }
70
71 static struct tst_test test = {
72 .setup = setup,
73 .cleanup = cleanup,
74 .test = run,
75 .tcnt = ARRAY_SIZE(tcases),
76 .needs_tmpdir = 1
77 };
78