From patchwork Mon Jun 1 17:54:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 225021 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 8A459C433E0 for ; Mon, 1 Jun 2020 18:19:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6949E2068D for ; Mon, 1 Jun 2020 18:19:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591035554; bh=H7naidMd5Qa0u04rOXvuNj7VG6ToA776KEDM8xBVLYI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DwkvicST9wfmb8UCwc97lMJco62/Lfw+aRrZQh3sD4dRItduJyFEkyi5T11lnWb7x oByOcewS2DOBGqvoaPOrxqelTJpMThPJRMYujaFE5BPxssokEvx0/lgtOVcjicI2qi iTs09Zd+RilQXTkEAE/M03dP/OQZlOHPeq74z3K0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731256AbgFASRV (ORCPT ); Mon, 1 Jun 2020 14:17:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:38418 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731566AbgFASRU (ORCPT ); Mon, 1 Jun 2020 14:17:20 -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 819B82068D; Mon, 1 Jun 2020 18:17:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591035440; bh=H7naidMd5Qa0u04rOXvuNj7VG6ToA776KEDM8xBVLYI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WkMPaAUxZhd3pj9/PslDSpFHHXskTRyyNyryXqEcRpd1WYEYBGJpI9SZEJ8ZQQssT aQb3Dnq6j89Bb+tN6YzEmVn0SmQGxoNarzaOJ7wGhQBGfVOa+5V4XWP/poX1wji8C+ ZDAAaAmi01NSlK5hNYaDM9zfWGW6QGdbY2sYY4MA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xin Long , Steffen Klassert Subject: [PATCH 5.6 159/177] esp6: get the right proto for transport mode in esp6_gso_encap Date: Mon, 1 Jun 2020 19:54:57 +0200 Message-Id: <20200601174101.549788863@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 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Xin Long commit 3c96ec56828922e3fe5477f75eb3fc02f98f98b5 upstream. For transport mode, when ipv6 nexthdr is set, the packet format might be like: ---------------------------------------------------- | | dest | | | | ESP | ESP | | IP6 hdr| opts.| ESP | TCP | Data | Trailer | ICV | ---------------------------------------------------- What it wants to get for x-proto in esp6_gso_encap() is the proto that will be set in ESP nexthdr. So it should skip all ipv6 nexthdrs and get the real transport protocol. Othersize, the wrong proto number will be set into ESP nexthdr. This patch is to skip all ipv6 nexthdrs by calling ipv6_skip_exthdr() in esp6_gso_encap(). Fixes: 7862b4058b9f ("esp: Add gso handlers for esp4 and esp6") Signed-off-by: Xin Long Signed-off-by: Steffen Klassert Signed-off-by: Greg Kroah-Hartman --- net/ipv6/esp6_offload.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- a/net/ipv6/esp6_offload.c +++ b/net/ipv6/esp6_offload.c @@ -121,9 +121,16 @@ static void esp6_gso_encap(struct xfrm_s struct ip_esp_hdr *esph; struct ipv6hdr *iph = ipv6_hdr(skb); struct xfrm_offload *xo = xfrm_offload(skb); - int proto = iph->nexthdr; + u8 proto = iph->nexthdr; skb_push(skb, -skb_network_offset(skb)); + + if (x->outer_mode.encap == XFRM_MODE_TRANSPORT) { + __be16 frag; + + ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &proto, &frag); + } + esph = ip_esp_hdr(skb); *skb_mac_header(skb) = IPPROTO_ESP;