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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 5010FC433E0 for ; Mon, 1 Jun 2020 18:16:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 27301206E2 for ; Mon, 1 Jun 2020 18:16:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591035408; bh=uq8fE0+EZghFhRDJN4QkzA7jiwNaZ0mZo+T10icP6Og=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Me028PH2DTSdzZwt+fkeFw588a4Q5pRHt5yEru4X/RWh9WJbImxv5qgoDP7yHziob TbFJAdsj54kZw1G+Xy1jJjpP/9zhGia1OkMtEspeC6ODvsb27PqzUBesXcfUqPhQLZ HRqRQnicNcfmsVoRl3VhDSLavSFddRcDKSVI2LSA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729134AbgFASQq (ORCPT ); Mon, 1 Jun 2020 14:16:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:37488 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731733AbgFASQm (ORCPT ); Mon, 1 Jun 2020 14:16:42 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 646C1206E2; Mon, 1 Jun 2020 18:16:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591035401; bh=uq8fE0+EZghFhRDJN4QkzA7jiwNaZ0mZo+T10icP6Og=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mKLYb8d4yrE9uyGASRIzHecGueUEpYpl2RjDrKYQn7oBaK7Dt9r1FvBYGElosySSw FdKGs2EO0CCvqwzRKSo4oBwkzklhP0n2viY3vvX7a4cWMV/mos0eS6m5IBs0xsrJN6 wF37Q91i6BZxwj+Tr9jGncUZ+KUsr5D10CZbV8Ws= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xin Long , Steffen Klassert Subject: [PATCH 5.6 144/177] xfrm: allow to accept packets with ipv6 NEXTHDR_HOP in xfrm_input Date: Mon, 1 Jun 2020 19:54:42 +0200 Message-Id: <20200601174100.476264469@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200601174048.468952319@linuxfoundation.org> References: <20200601174048.468952319@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xin Long commit afcaf61be9d1dbdee5ec186d1dcc67b6b692180f upstream. For beet mode, when it's ipv6 inner address with nexthdrs set, the packet format might be: ---------------------------------------------------- | outer | | dest | | | ESP | ESP | | IP hdr | ESP | opts.| TCP | Data | Trailer | ICV | ---------------------------------------------------- The nexthdr from ESP could be NEXTHDR_HOP(0), so it should continue processing the packet when nexthdr returns 0 in xfrm_input(). Otherwise, when ipv6 nexthdr is set, the packet will be dropped. I don't see any error cases that nexthdr may return 0. So fix it by removing the check for nexthdr == 0. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Xin Long Signed-off-by: Steffen Klassert Signed-off-by: Greg Kroah-Hartman --- net/xfrm/xfrm_input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -644,7 +644,7 @@ resume: dev_put(skb->dev); spin_lock(&x->lock); - if (nexthdr <= 0) { + if (nexthdr < 0) { if (nexthdr == -EBADMSG) { xfrm_audit_state_icvfail(x, skb, x->type->proto);