From patchwork Tue Apr 26 08:20:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 567814 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 B0028C433FE for ; Tue, 26 Apr 2022 09:05:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343771AbiDZJIf (ORCPT ); Tue, 26 Apr 2022 05:08:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44856 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346260AbiDZJDZ (ORCPT ); Tue, 26 Apr 2022 05:03:25 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B2EEE3CD2; Tue, 26 Apr 2022 01:43:46 -0700 (PDT) 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 DB20BB81CF0; Tue, 26 Apr 2022 08:43:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3EAF4C385A4; Tue, 26 Apr 2022 08:43:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650962623; bh=3xObiHzauvYXUgi+HTKdEGtrc02fLNsKRtvSnMIn7h0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PsVTMm1NMFBPpdPF8JpwsoZOCVqPZDuAtx9Okr59KI530+NWfDWMy4557WATYntpS XG9FSwk8HCZbD7J+yNCLR/IxhCkXLhqRHb7zS3m0+6/QGyIsJsYkK3Ot4w5LAPpdLP XAk+zZoUr2mqDU0gQLnMACeRGoZqACgSDfailTQc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Cong Wang , Peilin Ye , "David S. Miller" , Sasha Levin Subject: [PATCH 5.17 034/146] ip6_gre: Avoid updating tunnel->tun_hlen in __gre6_xmit() Date: Tue, 26 Apr 2022 10:20:29 +0200 Message-Id: <20220426081751.026207653@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081750.051179617@linuxfoundation.org> References: <20220426081750.051179617@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Peilin Ye [ Upstream commit f40c064e933d7787ca7411b699504d7a2664c1f5 ] Do not update tunnel->tun_hlen in data plane code. Use a local variable instead, just like "tunnel_hlen" in net/ipv4/ip_gre.c:gre_fb_xmit(). Co-developed-by: Cong Wang Signed-off-by: Cong Wang Signed-off-by: Peilin Ye Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/ipv6/ip6_gre.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 8753e9cec326..b43a46449130 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -743,6 +743,7 @@ static netdev_tx_t __gre6_xmit(struct sk_buff *skb, struct ip_tunnel_info *tun_info; const struct ip_tunnel_key *key; __be16 flags; + int tun_hlen; tun_info = skb_tunnel_info_txcheck(skb); if (IS_ERR(tun_info) || @@ -760,9 +761,9 @@ static netdev_tx_t __gre6_xmit(struct sk_buff *skb, dsfield = key->tos; flags = key->tun_flags & (TUNNEL_CSUM | TUNNEL_KEY | TUNNEL_SEQ); - tunnel->tun_hlen = gre_calc_hlen(flags); + tun_hlen = gre_calc_hlen(flags); - gre_build_header(skb, tunnel->tun_hlen, + gre_build_header(skb, tun_hlen, flags, protocol, tunnel_id_to_key32(tun_info->key.tun_id), (flags & TUNNEL_SEQ) ? htonl(tunnel->o_seqno++)