1// SPDX-License-Identifier: GPL-2.0
2#include <sys/mman.h>
3#include <stdio.h>
4#include <unistd.h>
5#include <string.h>
6#include <sys/time.h>
7#include <sys/resource.h>
8
9static int test_limit(void)
10{
11	int ret = 1;
12	struct rlimit lims;
13	void *map;
14
15	if (getrlimit(RLIMIT_MEMLOCK, &lims)) {
16		perror("getrlimit");
17		return ret;
18	}
19
20	if (mlockall(MCL_ONFAULT | MCL_FUTURE)) {
21		perror("mlockall");
22		return ret;
23	}
24
25	map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE,
26		   MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
27	if (map != MAP_FAILED)
28		printf("mmap should have failed, but didn't\n");
29	else {
30		ret = 0;
31		munmap(map, 2 * lims.rlim_max);
32	}
33
34	munlockall();
35	return ret;
36}
37
38int main(int argc, char **argv)
39{
40	int ret = 0;
41
42	ret += test_limit();
43	return ret;
44}
45