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 62B64C433EF for ; Mon, 20 Sep 2021 18:20:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4827561A58 for ; Mon, 20 Sep 2021 18:20:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377898AbhITSVj (ORCPT ); Mon, 20 Sep 2021 14:21:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:38978 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376707AbhITSOQ (ORCPT ); Mon, 20 Sep 2021 14:14:16 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 241F161409; Mon, 20 Sep 2021 17:21:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1632158475; bh=QF6wCS71/GyPFqKLTaD984ITltx47FzIXEJWlJH2qzs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LivFbVr2S8SbZ31IrsNZk9yqaulEAhFfoeTNq6wGY+OtxehytKNUfpFBIbNg5RHbq HGYm9vzU12akgTaqb7a7YryQIhtVL0btcBSDWT6uXMvhQidchsaPznHoOTJOBJcL2j aqDNscP0ce/uScM4Z0rwgp4lqYC5yHV8DAnEeOHA= 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 5.4 173/260] net: w5100: check return value after calling platform_get_resource() Date: Mon, 20 Sep 2021 18:43:11 +0200 Message-Id: <20210920163936.965175070@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210920163931.123590023@linuxfoundation.org> References: <20210920163931.123590023@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 a39ff4a47f3e1da3b036817ef436b1a9be10783a ] 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/wiznet/w5100.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c index bede1ff289c5..a65b7291e12a 100644 --- a/drivers/net/ethernet/wiznet/w5100.c +++ b/drivers/net/ethernet/wiznet/w5100.c @@ -1052,6 +1052,8 @@ static int w5100_mmio_probe(struct platform_device *pdev) mac_addr = data->mac_addr; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) + return -EINVAL; if (resource_size(mem) < W5100_BUS_DIRECT_SIZE) ops = &w5100_mmio_indirect_ops; else -- 2.30.2