From patchwork Fri Jul 7 07:11:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 785389 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3x3mnH5grFz9s7F for ; Fri, 7 Jul 2017 17:43:31 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752483AbdGGHnX (ORCPT ); Fri, 7 Jul 2017 03:43:23 -0400 Received: from gateway24.websitewelcome.com ([192.185.51.251]:33798 "EHLO gateway24.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751033AbdGGHnW (ORCPT ); Fri, 7 Jul 2017 03:43:22 -0400 X-Greylist: delayed 1903 seconds by postgrey-1.27 at vger.kernel.org; Fri, 07 Jul 2017 03:43:22 EDT Received: from cm10.websitewelcome.com (cm10.websitewelcome.com [100.42.49.4]) by gateway24.websitewelcome.com (Postfix) with ESMTP id E974D3646 for ; Fri, 7 Jul 2017 02:11:36 -0500 (CDT) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id TNPzdpLrNWWYXTNPzdlCEj; Fri, 07 Jul 2017 02:11:11 -0500 Received: from [189.152.152.176] (port=60284 helo=embeddedgus) by gator4166.hostgator.com with esmtpa (Exim 4.87) (envelope-from ) id 1dTNQO-002WGD-MK; Fri, 07 Jul 2017 02:11:36 -0500 Date: Fri, 7 Jul 2017 02:11:35 -0500 From: "Gustavo A. R. Silva" To: Felix Fietkau , John Crispin , Matthias Brugger Cc: netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH] net: ethernet: mediatek: add NULL check on of_match_device() return value Message-ID: <20170707071135.GA29205@embeddedgus> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 189.152.152.176 X-Exim-ID: 1dTNQO-002WGD-MK X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedgus) [189.152.152.176]:60284 X-Source-Auth: garsilva@embeddedor.com X-Email-Count: 6 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Check return value from call to of_match_device() in order to prevent a NULL pointer dereference. In case of NULL print error message and return -ENODEV Signed-off-by: Gustavo A. R. Silva Reviewed-by: Matthias Brugger --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index adaaafc..6a77dea 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -2408,6 +2408,11 @@ static int mtk_probe(struct platform_device *pdev) int i; match = of_match_device(of_mtk_match, &pdev->dev); + if (!match) { + dev_err(&pdev->dev, "failed to match device\n"); + return -ENODEV; + } + soc = (struct mtk_soc_data *)match->data; eth = devm_kzalloc(&pdev->dev, sizeof(*eth), GFP_KERNEL);