Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753063AbdHISWl (ORCPT ); Wed, 9 Aug 2017 14:22:41 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:59516 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753088AbdHISS3 (ORCPT ); Wed, 9 Aug 2017 14:18:29 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xin Long , "David S. Miller" Subject: [PATCH 4.9 54/93] dccp: fix a memleak for dccp_feat_init err process Date: Wed, 9 Aug 2017 11:13:47 -0700 Message-Id: <20170809181337.853185129@linuxfoundation.org> X-Mailer: git-send-email 2.14.0 In-Reply-To: <20170809181335.658857427@linuxfoundation.org> References: <20170809181335.658857427@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1195 Lines: 38 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xin Long [ Upstream commit e90ce2fc27cad7e7b1e72b9e66201a7a4c124c2b ] In dccp_feat_init, when ccid_get_builtin_ccids failsto alloc memory for rx.val, it should free tx.val before returning an error. Signed-off-by: Xin Long Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/dccp/feat.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/net/dccp/feat.c +++ b/net/dccp/feat.c @@ -1471,9 +1471,12 @@ int dccp_feat_init(struct sock *sk) * singleton values (which always leads to failure). * These settings can still (later) be overridden via sockopts. */ - if (ccid_get_builtin_ccids(&tx.val, &tx.len) || - ccid_get_builtin_ccids(&rx.val, &rx.len)) + if (ccid_get_builtin_ccids(&tx.val, &tx.len)) return -ENOBUFS; + if (ccid_get_builtin_ccids(&rx.val, &rx.len)) { + kfree(tx.val); + return -ENOBUFS; + } if (!dccp_feat_prefer(sysctl_dccp_tx_ccid, tx.val, tx.len) || !dccp_feat_prefer(sysctl_dccp_rx_ccid, rx.val, rx.len))