Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754031AbdLTCHo (ORCPT ); Tue, 19 Dec 2017 21:07:44 -0500 Received: from cmccmta2.chinamobile.com ([221.176.66.80]:58554 "EHLO cmccmta2.chinamobile.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753843AbdLTCHi (ORCPT ); Tue, 19 Dec 2017 21:07:38 -0500 X-RM-TRANSID: 2ee75a39c5e6904-985fa X-RM-TagInfo: emlType=0 X-RM-SPAM-FLAG: 00000000 X-RM-TRANSID: 2ee55a39c5e6630-69706 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 v3,net-next 1/2] ip_gre: fix potential memory leak in erspan_rcv Date: Wed, 20 Dec 2017 10:07:00 +0800 Message-Id: <1513735621-21913-2-git-send-email-yanhaishuang@cmss.chinamobile.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1513735621-21913-1-git-send-email-yanhaishuang@cmss.chinamobile.com> References: <1513735621-21913-1-git-send-email-yanhaishuang@cmss.chinamobile.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 900 Lines: 35 If md is NULL, tun_dst must be freed, otherwise it will cause memory leak. Fixes: 1a66a836da6 ("gre: add collect_md mode to ERSPAN tunnel") Cc: William Tu Signed-off-by: Haishuang Yan --- Changes since v3: * Rebase on latest master branch. * Fix wrong commit information. --- net/ipv4/ip_gre.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index fd4d6e9..3029e3e 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -313,8 +313,10 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi, return PACKET_REJECT; md = ip_tunnel_info_opts(&tun_dst->u.tun_info); - if (!md) + if (!md) { + dst_release((struct dst_entry *)tun_dst); return PACKET_REJECT; + } memcpy(md, pkt_md, sizeof(*md)); md->version = ver; -- 1.8.3.1