From patchwork Tue Nov 10 01:14:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "yukuai (C)" X-Patchwork-Id: 1397195 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=huawei.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CVVDg3h99z9s1l for ; Tue, 10 Nov 2020 12:11:15 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730490AbgKJBLL (ORCPT ); Mon, 9 Nov 2020 20:11:11 -0500 Received: from szxga06-in.huawei.com ([45.249.212.32]:7472 "EHLO szxga06-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727311AbgKJBLK (ORCPT ); Mon, 9 Nov 2020 20:11:10 -0500 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4CVVDR70Hwzhjr5; Tue, 10 Nov 2020 09:11:03 +0800 (CST) Received: from huawei.com (10.175.127.227) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.487.0; Tue, 10 Nov 2020 09:10:58 +0800 From: Yu Kuai To: , , , , <0x7f454c46@gmail.com> CC: , , , , Subject: [PATCH] net: xfrm: fix memory leak in xfrm_user_policy() Date: Tue, 10 Nov 2020 09:14:43 +0800 Message-ID: <20201110011443.2482437-1-yukuai3@huawei.com> X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org if xfrm_get_translator() failed, xfrm_user_policy() return without freeing 'data', which is allocated in memdup_sockptr(). Fixes: 96392ee5a13b ("xfrm/compat: Translate 32-bit user_policy from sockptr") Reported-by: Hulk Robot Signed-off-by: Yu Kuai --- net/xfrm/xfrm_state.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index a77da7aae6fe..2f1517827995 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -2382,8 +2382,10 @@ int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen) if (in_compat_syscall()) { struct xfrm_translator *xtr = xfrm_get_translator(); - if (!xtr) + if (!xtr) { + kfree(data); return -EOPNOTSUPP; + } err = xtr->xlate_user_policy_sockptr(&data, optlen); xfrm_put_translator(xtr);