From patchwork Fri Jun 19 07:43:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steffen Klassert X-Patchwork-Id: 217557 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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, 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 C50E4C433E0 for ; Fri, 19 Jun 2020 07:43:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A61952080C for ; Fri, 19 Jun 2020 07:43:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731008AbgFSHn5 (ORCPT ); Fri, 19 Jun 2020 03:43:57 -0400 Received: from a.mx.secunet.com ([62.96.220.36]:34780 "EHLO a.mx.secunet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730955AbgFSHnw (ORCPT ); Fri, 19 Jun 2020 03:43:52 -0400 Received: from localhost (localhost [127.0.0.1]) by a.mx.secunet.com (Postfix) with ESMTP id 2C4B92057E; Fri, 19 Jun 2020 09:43:51 +0200 (CEST) X-Virus-Scanned: by secunet Received: from a.mx.secunet.com ([127.0.0.1]) by localhost (a.mx.secunet.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id r877RYVS0Bas; Fri, 19 Jun 2020 09:43:47 +0200 (CEST) Received: from mail-essen-01.secunet.de (mail-essen-01.secunet.de [10.53.40.204]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by a.mx.secunet.com (Postfix) with ESMTPS id E6C512056D; Fri, 19 Jun 2020 09:43:46 +0200 (CEST) Received: from mbx-essen-01.secunet.de (10.53.40.197) by mail-essen-01.secunet.de (10.53.40.204) with Microsoft SMTP Server (TLS) id 14.3.487.0; Fri, 19 Jun 2020 09:43:46 +0200 Received: from gauss2.secunet.de (10.182.7.193) by mbx-essen-01.secunet.de (10.53.40.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 19 Jun 2020 09:43:46 +0200 Received: by gauss2.secunet.de (Postfix, from userid 1000) id E2CFD31800BD; Fri, 19 Jun 2020 09:43:45 +0200 (CEST) From: Steffen Klassert To: David Miller CC: Herbert Xu , Steffen Klassert , Subject: [PATCH 1/5] xfrm: Fix double ESP trailer insertion in IPsec crypto offload. Date: Fri, 19 Jun 2020 09:43:38 +0200 Message-ID: <20200619074342.14095-2-steffen.klassert@secunet.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200619074342.14095-1-steffen.klassert@secunet.com> References: <20200619074342.14095-1-steffen.klassert@secunet.com> MIME-Version: 1.0 X-ClientProxiedBy: cas-essen-01.secunet.de (10.53.40.201) To mbx-essen-01.secunet.de (10.53.40.197) X-EXCLAIMER-MD-CONFIG: 2c86f778-e09b-4440-8b15-867914633a10 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Huy Nguyen During IPsec performance testing, we see bad ICMP checksum. The error packet has duplicated ESP trailer due to double validate_xmit_xfrm calls. The first call is from ip_output, but the packet cannot be sent because netif_xmit_frozen_or_stopped is true and the packet gets dev_requeue_skb. The second call is from NET_TX softirq. However after the first call, the packet already has the ESP trailer. Fix by marking the skb with XFRM_XMIT bit after the packet is handled by validate_xmit_xfrm to avoid duplicate ESP trailer insertion. Fixes: f6e27114a60a ("net: Add a xfrm validate function to validate_xmit_skb") Signed-off-by: Huy Nguyen Reviewed-by: Boris Pismenny Reviewed-by: Raed Salem Reviewed-by: Saeed Mahameed Signed-off-by: Steffen Klassert --- include/net/xfrm.h | 1 + net/xfrm/xfrm_device.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 094fe682f5d7..c7d213c9f9d8 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -1008,6 +1008,7 @@ struct xfrm_offload { #define XFRM_GRO 32 #define XFRM_ESP_NO_TRAILER 64 #define XFRM_DEV_RESUME 128 +#define XFRM_XMIT 256 __u32 status; #define CRYPTO_SUCCESS 1 diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c index f50d1f97cf8e..626096bd0d29 100644 --- a/net/xfrm/xfrm_device.c +++ b/net/xfrm/xfrm_device.c @@ -108,7 +108,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur struct xfrm_offload *xo = xfrm_offload(skb); struct sec_path *sp; - if (!xo) + if (!xo || (xo->flags & XFRM_XMIT)) return skb; if (!(features & NETIF_F_HW_ESP)) @@ -129,6 +129,8 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur return skb; } + xo->flags |= XFRM_XMIT; + if (skb_is_gso(skb)) { struct net_device *dev = skb->dev;