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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 E2C34C433FE for ; Thu, 9 Sep 2021 13:11:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C728B611BF for ; Thu, 9 Sep 2021 13:11:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358536AbhIINMQ (ORCPT ); Thu, 9 Sep 2021 09:12:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:43480 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357102AbhIIM7h (ORCPT ); Thu, 9 Sep 2021 08:59:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6816163275; Thu, 9 Sep 2021 11:58:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631188739; bh=2WWMFcYrSSA8Uqwsq5ULjNmvsLcSWjfaxgSajwuiT0M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=STMEl2X1hucP5YBH/8jtG6CGrz3tLJy2LHQ2OH31234vXD5vag9NdTNJEZhRCMaGI Pk5BRRS56tbZFSvitQlIuklRkjcyXSSSZ29JTgVdQb/N+SxCUgD/Xbtyq3E2ROtaYp V2o3eBr8P5T15Y+pZrJ7zeZ/7LJEZKWWZM7upHFsDs0ENu0S7ehnxUtP1oqbwGhYd1 w5ien2lJdn3kj396AoLHEnS2XE43sDi3taN1ZyFViDIBkhFTChNQ8LbUr7qke5vfGp rLtB2j8v4NERdlSlEOxep/9bfuMdhUlaA1oP5OJtggAZIS/cXGztRK4R7M7lOmyCNi DQ2kpbGutTIWQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yang Yingliang , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 74/74] net: w5100: check return value after calling platform_get_resource() Date: Thu, 9 Sep 2021 07:57:26 -0400 Message-Id: <20210909115726.149004-74-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210909115726.149004-1-sashal@kernel.org> References: <20210909115726.149004-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 d8ba512f166a..41040756307a 100644 --- a/drivers/net/ethernet/wiznet/w5100.c +++ b/drivers/net/ethernet/wiznet/w5100.c @@ -1059,6 +1059,8 @@ 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