testcases/cve/cve-2017-6951.c

/*
 * Copyright (c) 2017 Richard Palethorpe <rpalethorpe@suse.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
/*
 * Test for CVE-2016-6951, original reproducer can be found here:
 * http://www.spinics.net/lists/keyrings/msg01845.html
 *
 * request_key() is not in glibc, so we just use the syscall directly instead
 * of linking to keyutils.
 */

#include <unistd.h>
#include <sys/syscall.h>

#include "tst_test.h"
#include "linux_syscall_numbers.h"

#define ATTEMPTS 0x100

static void run(void)
{
	int i;

	tst_res(TINFO, "Requesting dead key");
	for (i = 0; i < ATTEMPTS; i++)
		tst_syscall(__NR_request_key, "dead", "abc", "abc", 0, 0, 0);

	tst_res(TPASS, "No crash after %d attempts", ATTEMPTS);
}

static struct tst_test test = {
	.test_all = run,
};