From: anton <anton@openbsd.org>
Date: Sun, 22 Jul 2018 06:37:46 +0000 (+0000)
Subject: Add regress covering the recently fixed NULL pointer deref in fchown().
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=b6b913c5b60ca0a52d882c7ee2b27441a95cef23;p=openbsd

Add regress covering the recently fixed NULL pointer deref in fchown().
---

diff --git a/regress/sys/kern/fchown/Makefile b/regress/sys/kern/fchown/Makefile
new file mode 100644
index 00000000000..288a3e6b5c7
--- /dev/null
+++ b/regress/sys/kern/fchown/Makefile
@@ -0,0 +1,11 @@
+#	$OpenBSD: Makefile,v 1.1 2018/07/22 06:37:46 anton Exp $
+
+PROG=		fchown
+WARNINGS=	yes
+
+REGRESS_TARGETS+=	clone-device
+
+clone-device: ${PROG}
+	${SUDO} ./${PROG}
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/kern/fchown/fchown.c b/regress/sys/kern/fchown/fchown.c
new file mode 100644
index 00000000000..3fcfbec1f78
--- /dev/null
+++ b/regress/sys/kern/fchown/fchown.c
@@ -0,0 +1,40 @@
+/*	$OpenBSD: fchown.c,v 1.1 2018/07/22 06:37:46 anton Exp $	*/
+/*
+ * Copyright (c) 2018 Anton Lindqvist <anton@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Regression test for NULL-deref inside sys_fchown().
+ */
+
+#include <err.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int
+main(void)
+{
+	const char *path = "/dev/bpf";
+	int fd;
+
+	fd = open(path, O_WRONLY);
+	if (fd == -1)
+		err(1, "open: %s", path);
+	if (fchown(fd, 0, -1) == -1)
+		err(1, "fchown");
+	close(fd);
+
+	return 0;
+}