From patchwork Tue Jul 9 16:29:38 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Henriques X-Patchwork-Id: 257821 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 5043C2C0099 for ; Wed, 10 Jul 2013 02:32:31 +1000 (EST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1Uwaq0-0000ZE-O1; Tue, 09 Jul 2013 16:32:24 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1UwanL-00079x-KY for kernel-team@lists.ubuntu.com; Tue, 09 Jul 2013 16:29:39 +0000 Received: from bl15-104-132.dsl.telepac.pt ([188.80.104.132] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1UwanL-00085U-Dx; Tue, 09 Jul 2013 16:29:39 +0000 From: Luis Henriques To: Pablo Neira Ayuso Subject: [ 3.8.y.z extended stable ] Patch "netfilter: xt_TCPOPTSTRIP: don't use tcp_hdr()" has been added to staging queue Date: Tue, 9 Jul 2013 17:29:38 +0100 Message-Id: <1373387378-23448-1-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.1.2 X-Extended-Stable: 3.8 Cc: Phil Oester , kernel-team@lists.ubuntu.com, Florian Westphal X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com This is a note to let you know that I have just added a patch titled netfilter: xt_TCPOPTSTRIP: don't use tcp_hdr() to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.8.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 3dfb1854014f332f9043c8b0c7d8e1dc4cf84d74 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 11 Jun 2013 01:51:31 +0200 Subject: [PATCH] netfilter: xt_TCPOPTSTRIP: don't use tcp_hdr() commit ed82c437320c48a4032492f4a55a7e2c934158b6 upstream. In (bc6bcb5 netfilter: xt_TCPOPTSTRIP: fix possible mangling beyond packet boundary), the use of tcp_hdr was introduced. However, we cannot assume that skb->transport_header is set for non-local packets. Cc: Florian Westphal Reported-by: Phil Oester Signed-off-by: Pablo Neira Ayuso Signed-off-by: Luis Henriques --- net/netfilter/xt_TCPOPTSTRIP.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) -- 1.8.1.2 diff --git a/net/netfilter/xt_TCPOPTSTRIP.c b/net/netfilter/xt_TCPOPTSTRIP.c index 1eb1a44..b68fa19 100644 --- a/net/netfilter/xt_TCPOPTSTRIP.c +++ b/net/netfilter/xt_TCPOPTSTRIP.c @@ -48,11 +48,13 @@ tcpoptstrip_mangle_packet(struct sk_buff *skb, return NF_DROP; len = skb->len - tcphoff; - if (len < (int)sizeof(struct tcphdr) || - tcp_hdr(skb)->doff * 4 > len) + if (len < (int)sizeof(struct tcphdr)) return NF_DROP; tcph = (struct tcphdr *)(skb_network_header(skb) + tcphoff); + if (tcph->doff * 4 > len) + return NF_DROP; + opt = (u_int8_t *)tcph; /*