From patchwork Fri Oct 16 11:11:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Ovechkin X-Patchwork-Id: 1383265 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=yandex-team.ru Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yandex-team.ru header.i=@yandex-team.ru header.a=rsa-sha256 header.s=default header.b=rs1iVXnm; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CCNnT1QCXz9sRk for ; Fri, 16 Oct 2020 22:13:49 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394856AbgJPLNq (ORCPT ); Fri, 16 Oct 2020 07:13:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52118 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390640AbgJPLNq (ORCPT ); Fri, 16 Oct 2020 07:13:46 -0400 X-Greylist: delayed 101 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 16 Oct 2020 04:13:46 PDT Received: from forwardcorp1o.mail.yandex.net (forwardcorp1o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::193]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C647C061755 for ; Fri, 16 Oct 2020 04:13:46 -0700 (PDT) Received: from sas1-ec30c78b6c5b.qloud-c.yandex.net (sas1-ec30c78b6c5b.qloud-c.yandex.net [IPv6:2a02:6b8:c14:2704:0:640:ec30:c78b]) by forwardcorp1o.mail.yandex.net (Yandex) with ESMTP id EB6192E0464 for ; Fri, 16 Oct 2020 14:12:02 +0300 (MSK) Received: from sas2-32987e004045.qloud-c.yandex.net (sas2-32987e004045.qloud-c.yandex.net [2a02:6b8:c08:b889:0:640:3298:7e00]) by sas1-ec30c78b6c5b.qloud-c.yandex.net (mxbackcorp/Yandex) with ESMTP id 9Cnn0ft1Bp-C2wCGX8h; Fri, 16 Oct 2020 14:12:02 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1602846722; bh=sGeI+dxdC2AKxxRLqvASEnrSpM9wSJUG8pFLAOLj0Go=; h=Message-Id:Date:Subject:To:From; b=rs1iVXnmL9EYtU5OCxQi1MMIZmrQ4/wIo0NMjyQZaigpcSEPf0VmVy4rIZYIFIrfz Kby6NFBu3jYFf5DYg8eq5ZegES4Rni3VMwz7SyRpJv+2dWLLBBUMa48dPzeA2UDcnr /v7WUPbVMTd9qJg6r4nrhX0Oe4iQN+I7j8UkHNPk= Authentication-Results: sas1-ec30c78b6c5b.qloud-c.yandex.net; dkim=pass header.i=@yandex-team.ru Received: from ov.sas.yp-c.yandex.net (ov.sas.yp-c.yandex.net [2a02:6b8:c1b:2b1b:0:696:6703:0]) by sas2-32987e004045.qloud-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id Vozt16rNmX-C2n4iwCt; Fri, 16 Oct 2020 14:12:02 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) From: Alexander Ovechkin To: netdev@vger.kernel.org Subject: [PATCH net] ip6_tunnel: set inner ipproto before ip6_tnl_encap. Date: Fri, 16 Oct 2020 14:11:56 +0300 Message-Id: <20201016111156.26927-1-ovov@yandex-team.ru> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org ip6_tnl_encap assigns to proto transport protocol which encapsulates inner packet, but we must pass to set_inner_ipproto protocol of that inner packet. Calling set_inner_ipproto after ip6_tnl_encap might break gso. For example, in case of encapsulating ipv6 packet in fou6 packet, inner_ipproto would be set to IPPROTO_UDP instead of IPPROTO_IPV6. This would lead to incorrect calling sequence of gso functions: ipv6_gso_segment -> udp6_ufo_fragment -> skb_udp_tunnel_segment -> udp6_ufo_fragment instead of: ipv6_gso_segment -> udp6_ufo_fragment -> skb_udp_tunnel_segment -> ip6ip6_gso_segment Signed-off-by: Alexander Ovechkin --- net/ipv6/ip6_tunnel.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index a0217e5bf3bc..648db3fe508f 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1271,6 +1271,8 @@ int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield, if (max_headroom > dev->needed_headroom) dev->needed_headroom = max_headroom; + skb_set_inner_ipproto(skb, proto); + err = ip6_tnl_encap(skb, t, &proto, fl6); if (err) return err; @@ -1280,8 +1282,6 @@ int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield, ipv6_push_frag_opts(skb, &opt.ops, &proto); } - skb_set_inner_ipproto(skb, proto); - skb_push(skb, sizeof(struct ipv6hdr)); skb_reset_network_header(skb); ipv6h = ipv6_hdr(skb);