From patchwork Wed Apr 22 01:09:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tang Bin X-Patchwork-Id: 1274593 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=cmss.chinamobile.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 496Mk51TPRz9sSh for ; Wed, 22 Apr 2020 11:07:57 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726419AbgDVBHu (ORCPT ); Tue, 21 Apr 2020 21:07:50 -0400 Received: from cmccmta1.chinamobile.com ([221.176.66.79]:4379 "EHLO cmccmta1.chinamobile.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726055AbgDVBHt (ORCPT ); Tue, 21 Apr 2020 21:07:49 -0400 Received: from spf.mail.chinamobile.com (unknown[172.16.121.5]) by rmmx-syy-dmz-app02-12002 (RichMail) with SMTP id 2ee25e9f98d6b5c-f5e92; Wed, 22 Apr 2020 09:07:34 +0800 (CST) X-RM-TRANSID: 2ee25e9f98d6b5c-f5e92 X-RM-TagInfo: emlType=0 X-RM-SPAM-FLAG: 00000000 Received: from localhost.localdomain (unknown[112.25.154.146]) by rmsmtp-syy-appsvr03-12003 (RichMail) with SMTP id 2ee35e9f98d3d10-2c015; Wed, 22 Apr 2020 09:07:34 +0800 (CST) X-RM-TRANSID: 2ee35e9f98d3d10-2c015 From: Tang Bin To: kuba@kernel.org, khalasa@piap.pl, davem@davemloft.net, linus.walleij@linaro.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Tang Bin , Zhang Shengju Subject: [PATCH v2] net: ethernet: ixp4xx: Add error handling in ixp4xx_eth_probe() Date: Wed, 22 Apr 2020 09:09:22 +0800 Message-Id: <20200422010922.17728-1-tangbin@cmss.chinamobile.com> X-Mailer: git-send-email 2.20.1.windows.1 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The function ixp4xx_eth_probe() does not perform sufficient error checking after executing devm_ioremap_resource(), which can result in crashes if a critical error path is encountered. Fixes: f458ac479777 ("ARM/net: ixp4xx: Pass ethernet physical base as resource") Signed-off-by: Zhang Shengju Signed-off-by: Tang Bin --- v2: - add fixed tag --- drivers/net/ethernet/xscale/ixp4xx_eth.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c index 269596c15..2e5202923 100644 --- a/drivers/net/ethernet/xscale/ixp4xx_eth.c +++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c @@ -1387,6 +1387,8 @@ static int ixp4xx_eth_probe(struct platform_device *pdev) return -ENODEV; regs_phys = res->start; port->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(port->regs)) + return PTR_ERR(port->regs); switch (port->id) { case IXP4XX_ETH_NPEA: