From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 4EA76C282CE for ; Wed, 24 Apr 2019 14:51:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1E23B218FD for ; Wed, 24 Apr 2019 14:51:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556117474; bh=oMyM8yaDsFgcW/2ZYMeN8IgnLi9y13avJIvcHBHlF6Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jeMsxL/rS4ohMu5Bk6hLA0JQK0uP8ipwQfwUE6s+BLAd1cdMj5uTke7h2vtCn+RWf wHX0Rfl2rIg4oGak1DtgBzTLK451mP2AjAgjY+9SmS5pQi1OfspN/w/n1ZusGk7GqR xbs4LYCHHHo5JLCnw4AzslJ3nC5SwhsS1HgZPh1o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732496AbfDXOvN (ORCPT ); Wed, 24 Apr 2019 10:51:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:50252 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732748AbfDXOvG (ORCPT ); Wed, 24 Apr 2019 10:51:06 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1EA2F218FC; Wed, 24 Apr 2019 14:51:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556117465; bh=oMyM8yaDsFgcW/2ZYMeN8IgnLi9y13avJIvcHBHlF6Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AG1lunoJX+kz1oMBoqDcK178IFgAVODYXkqUFxZF8hOb3sgm7y98JRkAilLIS7zWM rx1PZd286vCtXzMauqtfwRWlwJ5W25Lh5t//ap8/Kdmo0pezy+26ygDK4EuB6nvUR/ 8NNGfLrPdCGqQ9O0UsL06T7WrUZSTPHZ1F4+yfig= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Liubin Shu , Zhen Lei , Yonglong Liu , Peng Li , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 20/28] net: hns: fix KASAN: use-after-free in hns_nic_net_xmit_hw() Date: Wed, 24 Apr 2019 10:50:04 -0400 Message-Id: <20190424145012.30886-20-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190424145012.30886-1-sashal@kernel.org> References: <20190424145012.30886-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Liubin Shu [ Upstream commit 3a39a12ad364a9acd1038ba8da67cd8430f30de4 ] This patch is trying to fix the issue due to: [27237.844750] BUG: KASAN: use-after-free in hns_nic_net_xmit_hw+0x708/0xa18[hns_enet_drv] After hnae_queue_xmit() in hns_nic_net_xmit_hw(), can be interrupted by interruptions, and than call hns_nic_tx_poll_one() to handle the new packets, and free the skb. So, when turn back to hns_nic_net_xmit_hw(), calling skb->len will cause use-after-free. This patch update tx ring statistics in hns_nic_tx_poll_one() to fix the bug. Signed-off-by: Liubin Shu Signed-off-by: Zhen Lei Signed-off-by: Yonglong Liu Signed-off-by: Peng Li Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/hisilicon/hns/hns_enet.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index ad8681cf5ef0..f77578a5ea9d 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -375,8 +375,6 @@ netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev, wmb(); /* commit all data before submit */ assert(skb->queue_mapping < priv->ae_handle->q_num); hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num); - ring->stats.tx_pkts++; - ring->stats.tx_bytes += skb->len; return NETDEV_TX_OK; @@ -916,6 +914,9 @@ static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data, /* issue prefetch for next Tx descriptor */ prefetch(&ring->desc_cb[ring->next_to_clean]); } + /* update tx ring statistics. */ + ring->stats.tx_pkts += pkts; + ring->stats.tx_bytes += bytes; NETIF_TX_UNLOCK(ndev); -- 2.19.1