From owner-svn-src-all@FreeBSD.ORG  Sun Feb 14 12:10:49 2010
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 702B41065670;
	Sun, 14 Feb 2010 12:10:49 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 604BC8FC16;
	Sun, 14 Feb 2010 12:10:49 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o1ECAnMe066058;
	Sun, 14 Feb 2010 12:10:49 GMT (envelope-from kib@svn.freebsd.org)
Received: (from kib@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id o1ECAnZS066056;
	Sun, 14 Feb 2010 12:10:49 GMT (envelope-from kib@svn.freebsd.org)
Message-Id: <201002141210.o1ECAnZS066056@svn.freebsd.org>
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sun, 14 Feb 2010 12:10:49 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r203866 - head/sys/fs/msdosfs
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 14 Feb 2010 12:10:49 -0000

Author: kib
Date: Sun Feb 14 12:10:49 2010
New Revision: 203866
URL: http://svn.freebsd.org/changeset/base/203866

Log:
  Invalid filesystem might cause the bp to be never read.
  
  Noted by:	Pedro F. Giffuni <giffunip tutopia com>
  Obtanined from:	NetBSD
  MFC after:	1 week

Modified:
  head/sys/fs/msdosfs/msdosfs_fat.c

Modified: head/sys/fs/msdosfs/msdosfs_fat.c
==============================================================================
--- head/sys/fs/msdosfs/msdosfs_fat.c	Sun Feb 14 12:08:44 2010	(r203865)
+++ head/sys/fs/msdosfs/msdosfs_fat.c	Sun Feb 14 12:10:49 2010	(r203866)
@@ -944,7 +944,8 @@ fillinusemap(pmp)
 		if (readcn == 0)
 			usemap_free(pmp, cn);
 	}
-	brelse(bp);
+	if (bp != NULL)
+		brelse(bp);
 	return (0);
 }