From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 025D0C07E85 for ; Sun, 9 Dec 2018 22:27:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C70B52081F for ; Sun, 9 Dec 2018 22:27:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C70B52081F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=decadent.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728631AbeLIW1B (ORCPT ); Sun, 9 Dec 2018 17:27:01 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:34702 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726392AbeLIVzM (ORCPT ); Sun, 9 Dec 2018 16:55:12 -0500 Received: from pub.yeoldevic.com ([81.174.156.145] helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1gW72b-0002ik-Ka; Sun, 09 Dec 2018 21:55:09 +0000 Received: from ben by deadeye with local (Exim 4.91) (envelope-from ) id 1gW72Y-0003EG-TA; Sun, 09 Dec 2018 21:55:06 +0000 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Haishuang Yan" , "Jiri Benc" , "David S. Miller" Date: Sun, 09 Dec 2018 21:50:33 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 027/328] vxlan: fix a potential issue when create a new vxlan fdb entry. In-Reply-To: X-SA-Exim-Connect-IP: 81.174.156.145 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.62-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Haishuang Yan commit 17b463654f41f0aa334efd5a6efeab8a6e9496f7 upstream. vxlan_fdb_append may return error, so add the proper check, otherwise it will cause memory leak. Signed-off-by: Haishuang Yan Changes in v2: - Unnecessary to initialize rc to zero. Acked-by: Jiri Benc Signed-off-by: David S. Miller Signed-off-by: Ben Hutchings --- drivers/net/vxlan.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -695,6 +695,7 @@ static int vxlan_fdb_create(struct vxlan struct vxlan_rdst *rd = NULL; struct vxlan_fdb *f; int notify = 0; + int rc; f = __vxlan_find_mac(vxlan, mac); if (f) { @@ -729,8 +730,7 @@ static int vxlan_fdb_create(struct vxlan if ((flags & NLM_F_APPEND) && (is_multicast_ether_addr(f->eth_addr) || is_zero_ether_addr(f->eth_addr))) { - int rc = vxlan_fdb_append(f, ip, port, vni, ifindex, - &rd); + rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); if (rc < 0) return rc; @@ -760,7 +760,11 @@ static int vxlan_fdb_create(struct vxlan INIT_LIST_HEAD(&f->remotes); memcpy(f->eth_addr, mac, ETH_ALEN); - vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); + rc = vxlan_fdb_append(f, ip, port, vni, ifindex, &rd); + if (rc < 0) { + kfree(f); + return rc; + } ++vxlan->addrcnt; hlist_add_head_rcu(&f->hlist,