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 0C34BC433EF for ; Fri, 22 Apr 2022 09:00:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1445763AbiDVJD2 (ORCPT ); Fri, 22 Apr 2022 05:03:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1445690AbiDVJDA (ORCPT ); Fri, 22 Apr 2022 05:03:00 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DBD7D517E7; Fri, 22 Apr 2022 02:00:07 -0700 (PDT) Received: from dggpemm500020.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Kl7d24pfDzfZS4; Fri, 22 Apr 2022 16:59:18 +0800 (CST) Received: from dggpemm500007.china.huawei.com (7.185.36.183) by dggpemm500020.china.huawei.com (7.185.36.49) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 22 Apr 2022 17:00:06 +0800 Received: from huawei.com (10.175.103.91) by dggpemm500007.china.huawei.com (7.185.36.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 22 Apr 2022 17:00:05 +0800 From: Yang Yingliang To: , CC: , Subject: [PATCH 07/20] hwmon: (lm78) check return value after calling platform_get_resource() Date: Fri, 22 Apr 2022 17:11:54 +0800 Message-ID: <20220422091207.4034406-8-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220422091207.4034406-1-yangyingliang@huawei.com> References: <20220422091207.4034406-1-yangyingliang@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpemm500007.china.huawei.com (7.185.36.183) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Fixes: c40769fee13c ("hwmon/lm78: No longer use i2c-isa") Signed-off-by: Yang Yingliang --- drivers/hwmon/lm78.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hwmon/lm78.c b/drivers/hwmon/lm78.c index 5e129cbec1cb..71c2a1bc75cc 100644 --- a/drivers/hwmon/lm78.c +++ b/drivers/hwmon/lm78.c @@ -792,6 +792,8 @@ static int lm78_isa_probe(struct platform_device *pdev) /* Reserve the ISA region */ res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!res) + return -EINVAL; if (!devm_request_region(dev, res->start + LM78_ADDR_REG_OFFSET, 2, "lm78")) return -EBUSY; -- 2.25.1