From 2847938186cc955e02d489f5bc9db7310f26f345 Mon Sep 17 00:00:00 2001
From: christos <christos@NetBSD.org>
Date: Sat, 24 May 2008 16:49:30 +0000
Subject: [PATCH] Coverity CID 5019: Check before deref.

---
 sys/kern/kern_subr.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/sys/kern/kern_subr.c b/sys/kern/kern_subr.c
index 4e12ceeddadd..d9d0172ec438 100644
--- a/sys/kern/kern_subr.c
+++ b/sys/kern/kern_subr.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: kern_subr.c,v 1.187 2008/05/02 13:02:31 ad Exp $	*/
+/*	$NetBSD: kern_subr.c,v 1.188 2008/05/24 16:49:30 christos Exp $	*/
 
 /*-
  * Copyright (c) 1997, 1998, 1999, 2002, 2007, 2008 The NetBSD Foundation, Inc.
@@ -79,7 +79,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_subr.c,v 1.187 2008/05/02 13:02:31 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_subr.c,v 1.188 2008/05/24 16:49:30 christos Exp $");
 
 #include "opt_ddb.h"
 #include "opt_md.h"
@@ -960,7 +960,10 @@ setroot(struct device *bootdv, int bootpartition)
 		 */
 		rootdv = bootdv;
 
-		majdev = devsw_name2blk(device_xname(bootdv), NULL, 0);
+		if (bootdv)
+			majdev = devsw_name2blk(device_xname(bootdv), NULL, 0);
+		else
+			majdev = -1;
 		if (majdev >= 0) {
 			/*
 			 * Root is on a disk.  `bootpartition' is root,