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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B0EEC4167B for ; Mon, 12 Dec 2022 13:18:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232646AbiLLNSJ (ORCPT ); Mon, 12 Dec 2022 08:18:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44194 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232741AbiLLNRU (ORCPT ); Mon, 12 Dec 2022 08:17:20 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8F74263 for ; Mon, 12 Dec 2022 05:17:14 -0800 (PST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 44B8F60FF4 for ; Mon, 12 Dec 2022 13:17:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A91BC433D2; Mon, 12 Dec 2022 13:17:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670851033; bh=7oOZDyf9yDHUbhs6jPMZoWbyvUJ9QHAFEDlkbmYuMQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=boBmZw7vxotpUNVg47oDBLoatRCKi2547EeAqBkYH+CzNO5T7vqiq12zA4mVzuwA+ ut5JPBQIZndvydywydrLSaGyPyaQuuUa13rmXrLQNDUeoW1FqEbFQr3LopMeVsksdG cPIXM5ZVPCS4nxcyWs1qyveWM3xDL883HCemLBBM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Liu Jian , Paolo Abeni , Sasha Levin Subject: [PATCH 5.10 094/106] net: hisilicon: Fix potential use-after-free in hix5hd2_rx() Date: Mon, 12 Dec 2022 14:10:37 +0100 Message-Id: <20221212130928.966659227@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221212130924.863767275@linuxfoundation.org> References: <20221212130924.863767275@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Liu Jian [ Upstream commit 433c07a13f59856e4585e89e86b7d4cc59348fab ] The skb is delivered to napi_gro_receive() which may free it, after calling this, dereferencing skb may trigger use-after-free. Fixes: 57c5bc9ad7d7 ("net: hisilicon: add hix5hd2 mac driver") Signed-off-by: Liu Jian Link: https://lore.kernel.org/r/20221203094240.1240211-2-liujian56@huawei.com Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/ethernet/hisilicon/hix5hd2_gmac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c index 8b2bf85039f1..43f3146caf07 100644 --- a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c +++ b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c @@ -550,7 +550,7 @@ static int hix5hd2_rx(struct net_device *dev, int limit) skb->protocol = eth_type_trans(skb, dev); napi_gro_receive(&priv->napi, skb); dev->stats.rx_packets++; - dev->stats.rx_bytes += skb->len; + dev->stats.rx_bytes += len; next: pos = dma_ring_incr(pos, RX_DESC_NUM); } -- 2.35.1