1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2023 Oracle and/or its affiliates. All Rights Reserved.
4 * Author: Liam R. Howlett <[email protected]>
5 */
6
7 /*\
8 * [Description]
9 *
10 * Testcase to check the mprotect(2) system call split and merge.
11 *
12 * https://bugzilla.kernel.org/show_bug.cgi?id=217061
13 *
14 */
15
16 #include "tst_test.h"
17
18 #define TEST_FILE "mprotect05-testfile"
19
20 static int fd;
21 static char *addr = MAP_FAILED;
22 static unsigned long pagesize;
23 static unsigned long fullsize;
24
setup(void)25 static void setup(void)
26 {
27 pagesize = getpagesize();
28 fullsize = 5 * pagesize;
29 }
30
run(void)31 static void run(void)
32 {
33 fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT, 0777);
34 addr = SAFE_MMAP(0, fullsize, PROT_READ, MAP_SHARED, fd, 0);
35
36 if (mprotect(addr + pagesize, pagesize, PROT_EXEC))
37 tst_res(TFAIL | TERRNO, "mprotect failed to exec");
38
39 if (mprotect(addr + 3 * pagesize, pagesize, PROT_WRITE))
40 tst_res(TFAIL | TERRNO, "mprotect failed to write");
41
42 if (mprotect(addr + pagesize, pagesize * 4, PROT_READ))
43 tst_res(TFAIL | TERRNO, "mprotect failed to read");
44
45 SAFE_MUNMAP(addr, fullsize);
46 SAFE_CLOSE(fd);
47 addr = MAP_FAILED;
48 SAFE_UNLINK(TEST_FILE);
49 tst_res(TPASS, "test passed");
50 }
51
cleanup(void)52 static void cleanup(void)
53 {
54 if (addr != MAP_FAILED) {
55 SAFE_MUNMAP(addr, fullsize);
56 SAFE_CLOSE(fd);
57 }
58 }
59
60 static struct tst_test test = {
61 .test_all = run,
62 .setup = setup,
63 .cleanup = cleanup,
64 .needs_tmpdir = 1,
65 .tags = (const struct tst_tag[]) {
66 {"linux-git", "2fcd07b7ccd5"},
67 {}
68 },
69 };
70