1/*	$OpenBSD: fchown.c,v 1.1 2018/07/22 06:37:46 anton Exp $	*/
2/*
3 * Copyright (c) 2018 Anton Lindqvist <anton@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/*
19 * Regression test for NULL-deref inside sys_fchown().
20 */
21
22#include <err.h>
23#include <fcntl.h>
24#include <unistd.h>
25
26int
27main(void)
28{
29	const char *path = "/dev/bpf";
30	int fd;
31
32	fd = open(path, O_WRONLY);
33	if (fd == -1)
34		err(1, "open: %s", path);
35	if (fchown(fd, 0, -1) == -1)
36		err(1, "fchown");
37	close(fd);
38
39	return 0;
40}
41