From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761936AbZD2W1S (ORCPT ); Wed, 29 Apr 2009 18:27:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758298AbZD2WVY (ORCPT ); Wed, 29 Apr 2009 18:21:24 -0400 Received: from kroah.org ([198.145.64.141]:40338 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758323AbZD2WVT (ORCPT ); Wed, 29 Apr 2009 18:21:19 -0400 X-Mailbox-Line: From gregkh@mini.kroah.org Wed Apr 29 15:09:25 2009 Message-Id: <20090429220925.292347131@mini.kroah.org> User-Agent: quilt/0.48-1 Date: Wed, 29 Apr 2009 15:07:15 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: Justin Forbes , Zwane Mwaikambo , "Theodore Ts'o" , Randy Dunlap , Dave Jones , Chuck Wolber , Chris Wedgwood , Michael Krufky , Chuck Ebbert , Domenico Andreoli , Willy Tarreau , Rodrigo Rubira Branco , Jake Edge , Eugene Teo , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, "David S. Miller" , Patrick McHardy Subject: [patch 16/58] netfilter: nf_conntrack_tcp: fix unaligned memory access in tcp_sack References: <20090429220659.339950874@mini.kroah.org> Content-Disposition: inline; filename=netfilter-nf_conntrack_tcp-fix-unaligned-memory-access-in-tcp_sack.patch In-Reply-To: <20090429221657.GA11765@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Mark H. Weaver [ Upstream commit 534f81a5068799799e264fd162e9488a129f98d4 ] This patch fixes an unaligned memory access in tcp_sack while reading sequence numbers from TCP selective acknowledgement options. Prior to applying this patch, upstream linux-2.6.27.20 was occasionally generating messages like this on my sparc64 system: [54678.532071] Kernel unaligned access at TPC[6b17d4] tcp_packet+0xcd4/0xd00 Acked-by: David S. Miller Signed-off-by: Patrick McHardy Signed-off-by: Greg Kroah-Hartman --- net/netfilter/nf_conntrack_proto_tcp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/netfilter/nf_conntrack_proto_tcp.c +++ b/net/netfilter/nf_conntrack_proto_tcp.c @@ -15,6 +15,7 @@ #include #include #include +#include #include @@ -466,7 +467,7 @@ static void tcp_sack(const struct sk_buf for (i = 0; i < (opsize - TCPOLEN_SACK_BASE); i += TCPOLEN_SACK_PERBLOCK) { - tmp = ntohl(*((__be32 *)(ptr+i)+1)); + tmp = get_unaligned_be32((__be32 *)(ptr+i)+1); if (after(tmp, *sack)) *sack = tmp;