From: millert <millert@openbsd.org>
Date: Thu, 30 Apr 2015 21:18:45 +0000 (+0000)
Subject: Avoid NULL deref in fd_getfile_mode(); OK deraadt@
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=38e3b1d365cf0ed01e20e7dd03db8f4085944fd9;p=openbsd

Avoid NULL deref in fd_getfile_mode(); OK deraadt@
---

diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c
index 2c8955c4d01..93d6a9c4cfe 100644
--- a/sys/kern/kern_descrip.c
+++ b/sys/kern/kern_descrip.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_descrip.c,v 1.118 2015/04/30 09:20:51 mpi Exp $	*/
+/*	$OpenBSD: kern_descrip.c,v 1.119 2015/04/30 21:18:45 millert Exp $	*/
 /*	$NetBSD: kern_descrip.c,v 1.42 1996/03/30 22:24:38 christos Exp $	*/
 
 /*
@@ -201,7 +201,7 @@ fd_getfile_mode(struct filedesc *fdp, int fd, int mode)
 
 	fp = fd_getfile(fdp, fd);
 
-	if ((fp->f_flag & mode) == 0)
+	if (fp == NULL || (fp->f_flag & mode) == 0)
 		return (NULL);
 
 	return (fp);