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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10DD0C433F5 for ; Mon, 21 Feb 2022 09:04:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347306AbiBUJFK (ORCPT ); Mon, 21 Feb 2022 04:05:10 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:58050 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347563AbiBUJBb (ORCPT ); Mon, 21 Feb 2022 04:01:31 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55D6822512; Mon, 21 Feb 2022 00:56:44 -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 ams.source.kernel.org (Postfix) with ESMTPS id 3D5A1B80EB5; Mon, 21 Feb 2022 08:56:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 54751C340E9; Mon, 21 Feb 2022 08:56:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1645433771; bh=3hY4r8/3UO+KDlgWBI1PWNsgwmTFyNxZwI7NNxVqog0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XQ5L4cuMBd4DkEuor9d66Ysz7ijxThmhtGIS1FQG7E0wzRObtZEZbmpN0OhCB7iSs M3Az+DvTVZX/jBn+9NbRZrhQP70dNPbrldwlneuu020YSOY/xAIzj54VP/rQTqOwos ANGAKG4YxibrgUB1YPPmKPSvG1H3SsGr0dl39y44= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Guillaume Nault , Jakub Kicinski , Sudip Mukherjee Subject: [PATCH 4.19 19/58] xfrm: Dont accidentally set RTO_ONLINK in decode_session4() Date: Mon, 21 Feb 2022 09:49:12 +0100 Message-Id: <20220221084912.507636200@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220221084911.895146879@linuxfoundation.org> References: <20220221084911.895146879@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guillaume Nault commit 23e7b1bfed61e301853b5e35472820d919498278 upstream. Similar to commit 94e2238969e8 ("xfrm4: strip ECN bits from tos field"), clear the ECN bits from iph->tos when setting ->flowi4_tos. This ensures that the last bit of ->flowi4_tos is cleared, so ip_route_output_key_hash() isn't going to restrict the scope of the route lookup. Use ~INET_ECN_MASK instead of IPTOS_RT_MASK, because we have no reason to clear the high order bits. Found by code inspection, compile tested only. Fixes: 4da3089f2b58 ("[IPSEC]: Use TOS when doing tunnel lookups") Signed-off-by: Guillaume Nault Signed-off-by: Jakub Kicinski [sudip: manually backport to previous location] Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman --- net/ipv4/xfrm4_policy.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/ipv4/xfrm4_policy.c +++ b/net/ipv4/xfrm4_policy.c @@ -17,6 +17,7 @@ #include #include #include +#include static struct dst_entry *__xfrm4_dst_lookup(struct net *net, struct flowi4 *fl4, int tos, int oif, @@ -126,7 +127,7 @@ _decode_session4(struct sk_buff *skb, st fl4->flowi4_proto = iph->protocol; fl4->daddr = reverse ? iph->saddr : iph->daddr; fl4->saddr = reverse ? iph->daddr : iph->saddr; - fl4->flowi4_tos = iph->tos; + fl4->flowi4_tos = iph->tos & ~INET_ECN_MASK; if (!ip_is_fragment(iph)) { switch (iph->protocol) {