From patchwork Mon Jan 24 18:35:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 535079 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD3C6C35273 for ; Mon, 24 Jan 2022 23:07:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1843631AbiAXXFI (ORCPT ); Mon, 24 Jan 2022 18:05:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1841795AbiAXXAC (ORCPT ); Mon, 24 Jan 2022 18:00:02 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 688DAC09D313; Mon, 24 Jan 2022 13:13:37 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 05D8E61513; Mon, 24 Jan 2022 21:13:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CD993C340E5; Mon, 24 Jan 2022 21:13:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643058816; bh=g5jYcDdJTtAaQIzC6WDSvOuOlk9FXh7FUac05QGiE4c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0opCvy+WAXd8BVVnovJKlIXyhX4GKDxcLBZ2g8joOodK1Vch/OebnQKWh2Qxg6Jr1 STm1mz2GD0HLBmnvlRFpi9flihbe6AjW8y90PzuEv66KJBAYn5CCHLFD1CLtY0XV1A CFUkIRt/ARf74Hc3yNwltyhp/rTno3vpPFEnP6z8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Raed Salem , Steffen Klassert , Sasha Levin Subject: [PATCH 5.16 0368/1039] net/xfrm: IPsec tunnel mode fix inner_ipproto setting in sec_path Date: Mon, 24 Jan 2022 19:35:57 +0100 Message-Id: <20220124184137.667754585@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184125.121143506@linuxfoundation.org> References: <20220124184125.121143506@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Raed Salem [ Upstream commit 45a98ef4922def8c679ca7c454403d1957fe70e7 ] The inner_ipproto saves the inner IP protocol of the plain text packet. This allows vendor's IPsec feature making offload decision at skb's features_check and configuring hardware at ndo_start_xmit, current code implenetation did not handle the case where IPsec is used in tunnel mode. Fix by handling the case when IPsec is used in tunnel mode by reading the protocol of the plain text packet IP protocol. Fixes: fa4535238fb5 ("net/xfrm: Add inner_ipproto into sec_path") Signed-off-by: Raed Salem Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin --- net/xfrm/xfrm_output.c | 30 +++++++++++++++++++++++++----- 1 file changed, 25 insertions(+), 5 deletions(-) diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c index 229544bc70c21..4dc4a7bbe51cf 100644 --- a/net/xfrm/xfrm_output.c +++ b/net/xfrm/xfrm_output.c @@ -647,10 +647,12 @@ static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb * This requires hardware to know the inner packet type to calculate * the inner header checksum. Save inner ip protocol here to avoid * traversing the packet in the vendor's xmit code. - * If the encap type is IPIP, just save skb->inner_ipproto. Otherwise, - * get the ip protocol from the IP header. + * For IPsec tunnel mode save the ip protocol from the IP header of the + * plain text packet. Otherwise If the encap type is IPIP, just save + * skb->inner_ipproto in any other case get the ip protocol from the IP + * header. */ -static void xfrm_get_inner_ipproto(struct sk_buff *skb) +static void xfrm_get_inner_ipproto(struct sk_buff *skb, struct xfrm_state *x) { struct xfrm_offload *xo = xfrm_offload(skb); const struct ethhdr *eth; @@ -658,6 +660,25 @@ static void xfrm_get_inner_ipproto(struct sk_buff *skb) if (!xo) return; + if (x->outer_mode.encap == XFRM_MODE_TUNNEL) { + switch (x->outer_mode.family) { + case AF_INET: + xo->inner_ipproto = ip_hdr(skb)->protocol; + break; + case AF_INET6: + xo->inner_ipproto = ipv6_hdr(skb)->nexthdr; + break; + default: + break; + } + + return; + } + + /* non-Tunnel Mode */ + if (!skb->encapsulation) + return; + if (skb->inner_protocol_type == ENCAP_TYPE_IPPROTO) { xo->inner_ipproto = skb->inner_ipproto; return; @@ -712,8 +733,7 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb) sp->xvec[sp->len++] = x; xfrm_state_hold(x); - if (skb->encapsulation) - xfrm_get_inner_ipproto(skb); + xfrm_get_inner_ipproto(skb, x); skb->encapsulation = 1; if (skb_is_gso(skb)) {