From patchwork Tue Oct 27 13:49:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 312937 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=-9.8 required=3.0 tests=BAYES_00,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=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 5B621C55178 for ; Tue, 27 Oct 2020 14:28:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1DBD722202 for ; Tue, 27 Oct 2020 14:28:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603808936; bh=oqR8DdE8DKB7AGWOWa8Cw+KmmLMLLWUWC5mJLsNP6xI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=D6S2GH+gMdzdlVH4uM0s+jPdBHoFrsL4VCSJul2PqDtnArEs3c3tLjCxr5IAdJCKr JuFqLspBKW4CoydSf5JO0XmNifW+4BlQ8FWmFSaM0lak1XT9f2EfwygHHuxTl9J5P+ W28IPktVYsR5RZvF5inpXYQdFyXNm7UWbwrE8Wj4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2901892AbgJ0O2x (ORCPT ); Tue, 27 Oct 2020 10:28:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:55366 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2896736AbgJ0O2v (ORCPT ); Tue, 27 Oct 2020 10:28:51 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 E20FD22202; Tue, 27 Oct 2020 14:28:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603808931; bh=oqR8DdE8DKB7AGWOWa8Cw+KmmLMLLWUWC5mJLsNP6xI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UFm1VI7Jy7ldpIvccduouOLxBXaHf4Olzajdg/r4CL95BqgaY/hU4imkjLDeeyB6s v9IhMG10ashb6YtTnjZMI9Uz9wPNJ8kgtLeNou5jv/Ei1YGKqHVrju2l7XccrnxnJH B4IjMUZkIzMw0bdkRrxosS3DNgEsh/LADuF58eHY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tobias Brunner , David Ahern , Jakub Kicinski Subject: [PATCH 5.4 003/408] ipv4: Restore flowi4_oif update before call to xfrm_lookup_route Date: Tue, 27 Oct 2020 14:49:01 +0100 Message-Id: <20201027135455.196459512@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135455.027547757@linuxfoundation.org> References: <20201027135455.027547757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Ahern [ Upstream commit 874fb9e2ca949b443cc419a4f2227cafd4381d39 ] Tobias reported regressions in IPsec tests following the patch referenced by the Fixes tag below. The root cause is dropping the reset of the flowi4_oif after the fib_lookup. Apparently it is needed for xfrm cases, so restore the oif update to ip_route_output_flow right before the call to xfrm_lookup_route. Fixes: 2fbc6e89b2f1 ("ipv4: Update exception handling for multipath routes via same device") Reported-by: Tobias Brunner Signed-off-by: David Ahern Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- net/ipv4/route.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2728,10 +2728,12 @@ struct rtable *ip_route_output_flow(stru if (IS_ERR(rt)) return rt; - if (flp4->flowi4_proto) + if (flp4->flowi4_proto) { + flp4->flowi4_oif = rt->dst.dev->ifindex; rt = (struct rtable *)xfrm_lookup_route(net, &rt->dst, flowi4_to_flowi(flp4), sk, 0); + } return rt; }