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=-9.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 11E22C43444 for ; Wed, 26 Dec 2018 23:01:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CBC912070B for ; Wed, 26 Dec 2018 23:01:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1545865309; bh=xEPPcGyXYi+XdMfYyNIssjsFMKQvo60l134+7kkM1YQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=vMJNbU1De0r4VuG3O9mKONHHJ9C/pT+tgo6mFQiwAS/4QtpiOxFS92tu+1bZFCfWs ESsY++lbBaKZyKOFJZaC1gYR+jl+RQP1V726MPRfPvzo5wfA2vLgWorjrQowDOaDnZ 6xMvvdEJxYF+CSsoJk8FVyt3BJPDq3Bh+MtKk4ek= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730551AbeLZXBs (ORCPT ); Wed, 26 Dec 2018 18:01:48 -0500 Received: from mail.kernel.org ([198.145.29.99]:36334 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727189AbeLZWgZ (ORCPT ); Wed, 26 Dec 2018 17:36:25 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 888A5218EA; Wed, 26 Dec 2018 22:36:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1545863785; bh=xEPPcGyXYi+XdMfYyNIssjsFMKQvo60l134+7kkM1YQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fIB9M2B/9ZJMZ4ucBASWItoUGRgnDTbZ3owwZWdhNaeHN3n8wdiI6s7smO7Om8FL9 51tunsC8c2+q/qjTdByiIUEdYIqQod8y3PJ3Si1zSO2qtokPSR5rn2/RXjt9nK/YiE bPwm+nFjoz6JAjDz4US1bwlKoKTZwBI1i3sciiv0= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Wei Yongjun , Steffen Klassert , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 16/97] xfrm: Fix error return code in xfrm_output_one() Date: Wed, 26 Dec 2018 17:34:36 -0500 Message-Id: <20181226223557.149329-16-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181226223557.149329-1-sashal@kernel.org> References: <20181226223557.149329-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wei Yongjun [ Upstream commit 533555e5cbb6aa2d77598917871ae5b579fe724b ] xfrm_output_one() does not return a error code when there is no dst_entry attached to the skb, it is still possible crash with a NULL pointer dereference in xfrm_output_resume(). Fix it by return error code -EHOSTUNREACH. Fixes: 9e1437937807 ("xfrm: Fix NULL pointer dereference when skb_dst_force clears the dst_entry.") Signed-off-by: Wei Yongjun Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin --- net/xfrm/xfrm_output.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c index 261995d37ced..6d20fbcde000 100644 --- a/net/xfrm/xfrm_output.c +++ b/net/xfrm/xfrm_output.c @@ -102,6 +102,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err) skb_dst_force(skb); if (!skb_dst(skb)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR); + err = -EHOSTUNREACH; goto error_nolock; } -- 2.19.1