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 26 int 27 main(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