xref: /aosp_15_r20/external/ltp/testcases/kernel/syscalls/mmap/mmap15.c (revision 49cdfc7efb34551c7342be41a7384b9c40d7cab7)

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) International Business Machines  Corp., 2004
 * Written by Robbie Williamson
 * Copyright (c) 2023 SUSE LLC Avinesh Kumar <[email protected]>
 * Copyright (c) Linux Test Project, 2014-2023
 */

/*\
 * [Description]
 *
 * Verify that, a normal page cannot be mapped into a high memory region,
 * and mmap() call fails with either ENOMEM or EINVAL errno.
 */

#include "tst_test.h"

#ifdef __ia64__
# define HIGH_ADDR ((void *)(0xa000000000000000UL))
#else
# define HIGH_ADDR ((void *)(-page_size))
#endif

#define TEMPFILE "mmapfile"

static long page_size;
static int fd;

static void run(void)
{
	fd = SAFE_OPEN(TEMPFILE, O_RDWR | O_CREAT, 0666);

	TESTPTR(mmap(HIGH_ADDR, page_size, PROT_READ, MAP_SHARED | MAP_FIXED, fd, 0));

	if (TST_RET_PTR != MAP_FAILED) {
		tst_res(TFAIL, "mmap() into high mem region succeeded unexpectedly");
		SAFE_MUNMAP(TST_RET_PTR, page_size);
		return;
	}

	if (TST_ERR == ENOMEM || TST_ERR == EINVAL)
		tst_res(TPASS | TERRNO, "mmap() failed with expected errno");
	else
		tst_res(TFAIL | TERRNO, "mmap() failed with unexpected errno");

	SAFE_CLOSE(fd);
}

static void setup(void)
{
	page_size = getpagesize();
}

static void cleanup(void)
{
	if (fd > 0)
		SAFE_CLOSE(fd);
}

static struct tst_test test = {
	.setup = setup,
	.cleanup = cleanup,
	.test_all = run,
	.needs_tmpdir = 1
};