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=-9.8 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=ham 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 75C63C76186 for ; Wed, 24 Jul 2019 19:27:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4CDD1229F4 for ; Wed, 24 Jul 2019 19:27:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563996458; bh=G/XVuCesdXq1fHz55fcAyE0FQZwiqcpuAxHc3Jf90E0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jX3CBWBRokyraTn2HkIO1UP3Q7abzhs53SmxeGl400dzOXOYj5/OMdta2/hoF6Sc+ NwsekhkSNG3SoacokekPFisSfNf7HOmGN1nP+Jb01FlFrnH1izZnEVQXeah+df5SGS oy0M4rR5gCJfSpb0Tj14q3jyvfb6KCRr78qyum2I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728030AbfGXT1h (ORCPT ); Wed, 24 Jul 2019 15:27:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:45408 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727195AbfGXT1f (ORCPT ); Wed, 24 Jul 2019 15:27:35 -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 63F36218EA; Wed, 24 Jul 2019 19:27:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563996454; bh=G/XVuCesdXq1fHz55fcAyE0FQZwiqcpuAxHc3Jf90E0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PQzSJ9VCd+cnPbdCo2x7RZC5dc9l6VxiRtvnrAgg451OuT3l/8vWSaK5I2qWm5sIy 2esqU/xTlsE6e/0P+FcEuPoe9kzInwcrPMSqmcRxmJSAARqCGjadc2iV8xohUrslHC BcVM2T1t/QruOizVAz2y9NQ5PIknq01gMS1kKTlk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yunsheng Lin , Peng Li , Huazhong Tan , "David S. Miller" , Sasha Levin Subject: [PATCH 5.2 102/413] net: hns3: fix for dereferencing before null checking Date: Wed, 24 Jul 2019 21:16:33 +0200 Message-Id: <20190724191742.502496346@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190724191735.096702571@linuxfoundation.org> References: <20190724191735.096702571@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 757188005f905664b0186b88cf26a7e844190a63 ] The netdev is dereferenced before null checking in the function hns3_setup_tc. This patch moves the dereferencing after the null checking. Fixes: 76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC") Signed-off-by: Yunsheng Lin Signed-off-by: Peng Li Signed-off-by: Huazhong Tan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 5611b990ac34..d18ad7b48a31 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -1514,12 +1514,12 @@ static void hns3_nic_get_stats64(struct net_device *netdev, static int hns3_setup_tc(struct net_device *netdev, void *type_data) { struct tc_mqprio_qopt_offload *mqprio_qopt = type_data; - struct hnae3_handle *h = hns3_get_handle(netdev); - struct hnae3_knic_private_info *kinfo = &h->kinfo; u8 *prio_tc = mqprio_qopt->qopt.prio_tc_map; + struct hnae3_knic_private_info *kinfo; u8 tc = mqprio_qopt->qopt.num_tc; u16 mode = mqprio_qopt->mode; u8 hw = mqprio_qopt->qopt.hw; + struct hnae3_handle *h; if (!((hw == TC_MQPRIO_HW_OFFLOAD_TCS && mode == TC_MQPRIO_MODE_CHANNEL) || (!hw && tc == 0))) @@ -1531,6 +1531,9 @@ static int hns3_setup_tc(struct net_device *netdev, void *type_data) if (!netdev) return -EINVAL; + h = hns3_get_handle(netdev); + kinfo = &h->kinfo; + return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ? kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP; } -- 2.20.1