From patchwork Sun Mar 15 14:15:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haishuang Yan X-Patchwork-Id: 1255061 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=cmss.chinamobile.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48gM1N1HSFz9sR4 for ; Mon, 16 Mar 2020 01:16:23 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728781AbgCOOQU (ORCPT ); Sun, 15 Mar 2020 10:16:20 -0400 Received: from cmccmta1.chinamobile.com ([221.176.66.79]:3134 "EHLO cmccmta1.chinamobile.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727778AbgCOOQU (ORCPT ); Sun, 15 Mar 2020 10:16:20 -0400 Received: from spf.mail.chinamobile.com (unknown[172.16.121.7]) by rmmx-syy-dmz-app04-12004 (RichMail) with SMTP id 2ee45e6e38a5144-caed9; Sun, 15 Mar 2020 22:16:07 +0800 (CST) X-RM-TRANSID: 2ee45e6e38a5144-caed9 X-RM-TagInfo: emlType=0 X-RM-SPAM-FLAG: 00000000 Received: from localhost (unknown[223.105.0.241]) by rmsmtp-syy-appsvr04-12004 (RichMail) with SMTP id 2ee45e6e38a0e85-2436e; Sun, 15 Mar 2020 22:16:07 +0800 (CST) X-RM-TRANSID: 2ee45e6e38a0e85-2436e From: Haishuang Yan To: Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal Cc: netfilter-devel@vger.kernel.org, coreteam@netfilter.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Haishuang Yan Subject: [PATCH 4/4] netfilter: nf_flow_table: reload iph in nf_flow_tuple_ip Date: Sun, 15 Mar 2020 22:15:05 +0800 Message-Id: <1584281705-26228-4-git-send-email-yanhaishuang@cmss.chinamobile.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1584281705-26228-1-git-send-email-yanhaishuang@cmss.chinamobile.com> References: <1584281705-26228-1-git-send-email-yanhaishuang@cmss.chinamobile.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Since pskb_may_pull may change skb->data, so we need to reload iph at the right place. Fixes: 7d2086871762 ("netfilter: nf_flow_table: move ipv4 offload hook code to nf_flow_table") Signed-off-by: Haishuang Yan --- net/netfilter/nf_flow_table_ip.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c index 954737f..610c60a 100644 --- a/net/netfilter/nf_flow_table_ip.c +++ b/net/netfilter/nf_flow_table_ip.c @@ -190,6 +190,7 @@ static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev, if (!pskb_may_pull(skb, thoff + sizeof(*ports))) return -1; + iph = ip_hdr(skb); ports = (struct flow_ports *)(skb_network_header(skb) + thoff); tuple->src_v4.s_addr = iph->saddr;