1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
4 * AUTHOR: Nirmala Devi Dhanasekar <[email protected]>
5 */
6
7 /*\
8 * [Description]
9 *
10 * Test for ENOMEM error.
11 *
12 * munlock(2) fails with ENOMEM if some of the specified address range
13 * does not correspond to mapped pages in the address space of the
14 * process.
15 */
16
17 #include <sys/mman.h>
18 #include "tst_test.h"
19
20 static size_t len, pg_size;
21 static void *addr;
22
run(void)23 static void run(void)
24 {
25 TST_EXP_FAIL(munlock(addr, len), ENOMEM, "munlock(%p, %lu)",
26 addr, len);
27 }
28
setup(void)29 static void setup(void)
30 {
31 pg_size = getpagesize();
32 len = 8 * pg_size;
33 addr = SAFE_MMAP(NULL, len, PROT_READ | PROT_WRITE,
34 MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
35 memset(addr, 0x20, len);
36 SAFE_MLOCK(addr, len);
37 /*
38 * unmap part of the area, to create the condition for ENOMEM
39 */
40 addr += 2 * pg_size;
41 SAFE_MUNMAP(addr, 4 * pg_size);
42 }
43
44 static struct tst_test test = {
45 .needs_root = 1,
46 .setup = setup,
47 .test_all = run,
48 };
49