From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DC127C8E5 for ; Mon, 26 Jun 2023 18:37:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 64E36C433C8; Mon, 26 Jun 2023 18:37:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687804648; bh=gf9JUNT9sR1lZgqk+XYC+GiCEFSiEr66Utc40VXGGdc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U4BzVFrEB5WOfyAXLhm9XsfPppjk381M0X/88kdn6QeanWIN2vR1rHsZS79dg/gEN Y3Si0sBfA+h3hjOuQxkf05+fhKHCNQFmXH6KLBWQdPyTR8Y4bb3dvhm31uPnTvo7oO 7AMF446Mkvc7iXd8C513fKWRghTrV6bMR/DtWNA4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sebastian Andrzej Siewior , Steffen Klassert , Sasha Levin Subject: [PATCH 5.4 27/60] xfrm: Linearize the skb after offloading if needed. Date: Mon, 26 Jun 2023 20:12:06 +0200 Message-ID: <20230626180740.639985220@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180739.558575012@linuxfoundation.org> References: <20230626180739.558575012@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Sebastian Andrzej Siewior [ Upstream commit f015b900bc3285322029b4a7d132d6aeb0e51857 ] With offloading enabled, esp_xmit() gets invoked very late, from within validate_xmit_xfrm() which is after validate_xmit_skb() validates and linearizes the skb if the underlying device does not support fragments. esp_output_tail() may add a fragment to the skb while adding the auth tag/ IV. Devices without the proper support will then send skb->data points to with the correct length so the packet will have garbage at the end. A pcap sniffer will claim that the proper data has been sent since it parses the skb properly. It is not affected with INET_ESP_OFFLOAD disabled. Linearize the skb after offloading if the sending hardware requires it. It was tested on v4, v6 has been adopted. Fixes: 7785bba299a8d ("esp: Add a software GRO codepath") Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin --- net/ipv4/esp4_offload.c | 3 +++ net/ipv6/esp6_offload.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/net/ipv4/esp4_offload.c b/net/ipv4/esp4_offload.c index 8c0af30fb0679..5cd219d7e7466 100644 --- a/net/ipv4/esp4_offload.c +++ b/net/ipv4/esp4_offload.c @@ -283,6 +283,9 @@ static int esp_xmit(struct xfrm_state *x, struct sk_buff *skb, netdev_features_ secpath_reset(skb); + if (skb_needs_linearize(skb, skb->dev->features) && + __skb_linearize(skb)) + return -ENOMEM; return 0; } diff --git a/net/ipv6/esp6_offload.c b/net/ipv6/esp6_offload.c index 1c532638b2adf..e19c1844276f8 100644 --- a/net/ipv6/esp6_offload.c +++ b/net/ipv6/esp6_offload.c @@ -314,6 +314,9 @@ static int esp6_xmit(struct xfrm_state *x, struct sk_buff *skb, netdev_features secpath_reset(skb); + if (skb_needs_linearize(skb, skb->dev->features) && + __skb_linearize(skb)) + return -ENOMEM; return 0; } -- 2.39.2