Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751893AbdGGGqf (ORCPT ); Fri, 7 Jul 2017 02:46:35 -0400 Received: from gateway31.websitewelcome.com ([192.185.143.43]:21269 "EHLO gateway31.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750938AbdGGGqd (ORCPT ); Fri, 7 Jul 2017 02:46:33 -0400 Date: Fri, 7 Jul 2017 01:46:30 -0500 From: "Gustavo A. R. Silva" To: Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Carlo Caione , Kevin Hilman Cc: linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH] iio: adc: meson-saradc: add NULL check on of_match_device() return value Message-ID: <20170707064630.GA21945@embeddedgus> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii 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: 1dTN27-002GSa-15 X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedgus) [189.152.152.176]:60170 X-Source-Auth: garsilva@embeddedor.com X-Email-Count: 45 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 827 Lines: 28 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 --- drivers/iio/adc/meson_saradc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c index 83da50e..07dbcc3 100644 --- a/drivers/iio/adc/meson_saradc.c +++ b/drivers/iio/adc/meson_saradc.c @@ -915,6 +915,11 @@ static int meson_sar_adc_probe(struct platform_device *pdev) init_completion(&priv->done); match = of_match_device(meson_sar_adc_of_match, &pdev->dev); + if (!match) { + dev_err(&pdev->dev, "failed to match device\n"); + return -ENODEV; + } + priv->data = match->data; indio_dev->name = priv->data->name; -- 2.5.0