From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934581Ab3GQW4i (ORCPT ); Wed, 17 Jul 2013 18:56:38 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:56772 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934522Ab3GQW4e (ORCPT ); Wed, 17 Jul 2013 18:56:34 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Phil Oester , Pablo Neira Ayuso , Luis Henriques Subject: [PATCH 081/145] netfilter: xt_TCPMSS: Fix missing fragmentation handling Date: Wed, 17 Jul 2013 15:46:53 -0700 Message-Id: <1374101277-7915-82-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1374101277-7915-1-git-send-email-kamal@canonical.com> References: <1374101277-7915-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.8.13.5 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Phil Oester commit b396966c4688522863572927cb30aa874b3ec504 upstream. Similar to commit bc6bcb59 ("netfilter: xt_TCPOPTSTRIP: fix possible mangling beyond packet boundary"), add safe fragment handling to xt_TCPMSS. Signed-off-by: Phil Oester Signed-off-by: Pablo Neira Ayuso Signed-off-by: Luis Henriques --- net/netfilter/xt_TCPMSS.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c index 4960b66..a77d786 100644 --- a/net/netfilter/xt_TCPMSS.c +++ b/net/netfilter/xt_TCPMSS.c @@ -55,6 +55,10 @@ tcpmss_mangle_packet(struct sk_buff *skb, u16 newmss; u8 *opt; + /* This is a fragment, no TCP header is available */ + if (par->fragoff != 0) + return XT_CONTINUE; + if (!skb_make_writable(skb, skb->len)) return -1; -- 1.8.1.2