From patchwork Sat Dec 16 02:58:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haishuang Yan X-Patchwork-Id: 849454 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3yzBpN2k8kz9s84 for ; Sat, 16 Dec 2017 13:59:08 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756636AbdLPC6v (ORCPT ); Fri, 15 Dec 2017 21:58:51 -0500 Received: from cmccmta1.chinamobile.com ([221.176.66.79]:57454 "EHLO cmccmta1.chinamobile.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755976AbdLPC6t (ORCPT ); Fri, 15 Dec 2017 21:58:49 -0500 Received: from spf.mail.chinamobile.com (unknown[172.16.121.1]) by rmmx-syy-dmz-app01-12001 (RichMail) with SMTP id 2ee15a348be613b-48f55; Sat, 16 Dec 2017 10:58:46 +0800 (CST) X-RM-TRANSID: 2ee15a348be613b-48f55 X-RM-TagInfo: emlType=0 X-RM-SPAM-FLAG: 00000000 Received: from localhost (unknown[223.105.0.240]) by rmsmtp-syy-appsvr01-12001 (RichMail) with SMTP id 2ee15a348be6ed9-845e6; Sat, 16 Dec 2017 10:58:46 +0800 (CST) X-RM-TRANSID: 2ee15a348be6ed9-845e6 From: Haishuang Yan To: "David S. Miller" , Alexey Kuznetsov , Hideaki YOSHIFUJI Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Haishuang Yan , William Tu Subject: [PATCH v2, net-next 1/2] ip_gre: fix error path when erspan_rcv failed Date: Sat, 16 Dec 2017 10:58:23 +0800 Message-Id: <1513393104-30749-1-git-send-email-yanhaishuang@cmss.chinamobile.com> X-Mailer: git-send-email 1.8.3.1 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org When erspan_rcv call return PACKET_REJECT, we shoudn't call ipgre_rcv to process packets again, instead send icmp unreachable message in error path. Fixes: 84e54fe0a5ea ("gre: introduce native tunnel support for ERSPAN") Acked-by: William Tu Cc: William Tu Signed-off-by: Haishuang Yan Change since v2: * Rebase on latest master branch. --- net/ipv4/ip_gre.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 33af55a..ccfc5bc 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -434,11 +434,13 @@ static int gre_rcv(struct sk_buff *skb) tpi.proto == htons(ETH_P_ERSPAN2))) { if (erspan_rcv(skb, &tpi, hdr_len) == PACKET_RCVD) return 0; + goto out; } if (ipgre_rcv(skb, &tpi, hdr_len) == PACKET_RCVD) return 0; +out: icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0); drop: kfree_skb(skb);