From patchwork Fri Jun 19 14:29:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 223914 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 97517C433DF for ; Fri, 19 Jun 2020 15:59:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6C21721973 for ; Fri, 19 Jun 2020 15:59:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592582341; bh=r2ZD/z74CHUpWNLziOf1yJLE0NiqYpuEhktxmoHnFwk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dkvCct25VpF/a8NJvFfh+Gf6WTcvT/6cy0t/DOevdmKiE4wUzFCJG7FJQ1QqLSb+S oWqoLc61oYQjDibwjTO2nSgECcpvikvAOOUud0d85UXw+APOiEUsjZk2NxZCUFBWYh OwzjQkvjUeD657DQ78FndK8S/9hc+HDPKACsjQsg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392428AbgFSPTW (ORCPT ); Fri, 19 Jun 2020 11:19:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:48824 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392584AbgFSPSS (ORCPT ); Fri, 19 Jun 2020 11:18:18 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 50A092158C; Fri, 19 Jun 2020 15:18:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592579897; bh=r2ZD/z74CHUpWNLziOf1yJLE0NiqYpuEhktxmoHnFwk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pChlHCVbfeMpM7Jos/zL4FhCM+YiNWUOD68zmzpyFLtPMz4Dhdc/z+lgBSanBGclB 4v76b79AIjPoFSp+tjbqZmpCSUiLXPo1QnQ4gPGQruAzH83WnZhrc5Smf3FPs4qw+j 4LxeHWGOl+g54qLS9Vo7g/T19TRcDOBM1N7kvNOc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jesper Dangaard Brouer , Alexei Starovoitov , Jeff Kirsher , Sasha Levin Subject: [PATCH 5.7 044/376] ixgbe: Fix XDP redirect on archs with PAGE_SIZE above 4K Date: Fri, 19 Jun 2020 16:29:22 +0200 Message-Id: <20200619141712.443793335@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141710.350494719@linuxfoundation.org> References: <20200619141710.350494719@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jesper Dangaard Brouer [ Upstream commit 88eb0ee17b2ece64fcf6689a4557a5c2e7a89c4b ] The ixgbe driver have another memory model when compiled on archs with PAGE_SIZE above 4096 bytes. In this mode it doesn't split the page in two halves, but instead increment rx_buffer->page_offset by truesize of packet (which include headroom and tailroom for skb_shared_info). This is done correctly in ixgbe_build_skb(), but in ixgbe_rx_buffer_flip which is currently only called on XDP_TX and XDP_REDIRECT, it forgets to add the tailroom for skb_shared_info. This breaks XDP_REDIRECT, for veth and cpumap. Fix by adding size of skb_shared_info tailroom. Maintainers notice: This fix have been queued to Jeff. Fixes: 6453073987ba ("ixgbe: add initial support for xdp redirect") Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Alexei Starovoitov Cc: Jeff Kirsher Link: https://lore.kernel.org/bpf/158945344946.97035.17031588499266605743.stgit@firesoul Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 718931d951bc..ea6834bae04c 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -2254,7 +2254,8 @@ static void ixgbe_rx_buffer_flip(struct ixgbe_ring *rx_ring, rx_buffer->page_offset ^= truesize; #else unsigned int truesize = ring_uses_build_skb(rx_ring) ? - SKB_DATA_ALIGN(IXGBE_SKB_PAD + size) : + SKB_DATA_ALIGN(IXGBE_SKB_PAD + size) + + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) : SKB_DATA_ALIGN(size); rx_buffer->page_offset += truesize;