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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 D5CCCC07E9B for ; Mon, 19 Jul 2021 15:01:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C36C56112D for ; Mon, 19 Jul 2021 15:01:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241909AbhGSOUx (ORCPT ); Mon, 19 Jul 2021 10:20:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:55876 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242196AbhGSOTb (ORCPT ); Mon, 19 Jul 2021 10:19:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DBFEF60FDC; Mon, 19 Jul 2021 15:00:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626706811; bh=n2vsdjTx/lctda6weRG5p0tIWznoempiBW0ujVFOs84=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pcCo09PA8LrCc2mx5a04UFl6meBxMnDbvvG01OgJd1PhVk4cliXq4Vx9aWkyPWM5+ tDm2QgxglLhQuS+LXGUH4yCBHXBP5pJ9yXNnz+zHMythmNA2TSFqM21EjNSPWc/zut vvLocT0X4kK8l8LACH+ChWF+I5yElS883m2O4P+g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yang Yingliang , "David S. Miller" , Sasha Levin Subject: [PATCH 4.4 107/188] net: micrel: check return value after calling platform_get_resource() Date: Mon, 19 Jul 2021 16:51:31 +0200 Message-Id: <20210719144938.043726850@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144913.076563739@linuxfoundation.org> References: <20210719144913.076563739@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yang Yingliang [ Upstream commit 20f1932e2282c58cb5ac59517585206cf5b385ae ] It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/micrel/ks8842.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/micrel/ks8842.c b/drivers/net/ethernet/micrel/ks8842.c index cb0102dd7f70..d691c33dffc6 100644 --- a/drivers/net/ethernet/micrel/ks8842.c +++ b/drivers/net/ethernet/micrel/ks8842.c @@ -1150,6 +1150,10 @@ static int ks8842_probe(struct platform_device *pdev) unsigned i; iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!iomem) { + dev_err(&pdev->dev, "Invalid resource\n"); + return -EINVAL; + } if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) goto err_mem_region; -- 2.30.2