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 6C42CC4332F for ; Mon, 12 Dec 2022 13:56:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233099AbiLLN4K (ORCPT ); Mon, 12 Dec 2022 08:56:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233260AbiLLNzi (ORCPT ); Mon, 12 Dec 2022 08:55:38 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6FA3C1165 for ; Mon, 12 Dec 2022 05:55:36 -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 0CBB9610A1 for ; Mon, 12 Dec 2022 13:55:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AA439C433D2; Mon, 12 Dec 2022 13:55:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670853335; bh=8FXUF136z2k7g9Dgw9fgEZQ/9bt95sdPn4GVO1EEXRg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sZXERmq7acwHqCzU0T7hFFj2iIodw+wYTh1aoTVDbRs8DNmzSHb7CqoddBogyou+h 4l1Il4Nzfro8//sz6IIUNov6JS5yaar8D6wVCZz14LoXNHxpsJ23Tr4J8603OIrNXB bKI5/y8LAbnPqbBDbxPGrkGivdOaqEfvgXWA0GcM= 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 4.9 26/31] net: hisilicon: Fix potential use-after-free in hix5hd2_rx() Date: Mon, 12 Dec 2022 14:19:44 +0100 Message-Id: <20221212130911.434509378@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221212130909.943483205@linuxfoundation.org> References: <20221212130909.943483205@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 dd24c352b200..4dc6c3e99d15 100644 --- a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c +++ b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c @@ -498,7 +498,7 @@ 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