Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751234AbdFEA5b (ORCPT ); Sun, 4 Jun 2017 20:57:31 -0400 Received: from cmccmta1.chinamobile.com ([221.176.66.79]:58983 "EHLO cmccmta1.chinamobile.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751163AbdFEA51 (ORCPT ); Sun, 4 Jun 2017 20:57:27 -0400 X-RM-TRANSID: 2ee25934ac7358e-e4d39 X-RM-SPAM-FLAG: 00000000 X-RM-TRANSID: 2ee15934ac72cc3-bf40c From: Haishuang Yan To: "David S. Miller" , Arkadi Sharshevsky , Jiri Pirko Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Haishuang Yan Subject: [PATCH v2] devlink: fix potential memort leak Date: Mon, 5 Jun 2017 08:57:21 +0800 Message-Id: <1496624241-25794-1-git-send-email-yanhaishuang@cmss.chinamobile.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1145 Lines: 44 We must free allocated skb when genlmsg_put() return fails. Fixes: 1555d204e743 ("devlink: Support for pipeline debug (dpipe)") Signed-off-by: Haishuang Yan --- Changes in v2: - Fix same issue in headers_fill. --- net/core/devlink.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/net/core/devlink.c b/net/core/devlink.c index b0b87a2..a0adfc3 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -1680,8 +1680,10 @@ static int devlink_dpipe_tables_fill(struct genl_info *info, hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, &devlink_nl_family, NLM_F_MULTI, cmd); - if (!hdr) + if (!hdr) { + nlmsg_free(skb); return -EMSGSIZE; + } if (devlink_nl_put_handle(skb, devlink)) goto nla_put_failure; @@ -2098,8 +2100,10 @@ static int devlink_dpipe_headers_fill(struct genl_info *info, hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, &devlink_nl_family, NLM_F_MULTI, cmd); - if (!hdr) + if (!hdr) { + nlmsg_free(skb); return -EMSGSIZE; + } if (devlink_nl_put_handle(skb, devlink)) goto nla_put_failure; -- 1.8.3.1