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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 AA446C004C9 for ; Tue, 7 May 2019 06:01:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7738B21479 for ; Tue, 7 May 2019 06:01:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557208880; bh=8eSI9nxK7/A1OjFsFLV8LynX+vejKP5TFlSub7YZ5UU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Jq9gfZqxJpxrhvKVo8fiB1e8NC+vE/VnMYrqMbTCJrcN6J6XbbXfUneOAjUAiEkLN XQnBMG/I0uwPKu3BftgwOzt4NSfn2RybTkSLDo+Z7vE6K3ZMKEyrTC8Vwst1lyrY73 5msFjYm7kNkFcmIZwtRcPEonuG4lgZU+G6GtATl4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726816AbfEGGBS (ORCPT ); Tue, 7 May 2019 02:01:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:56064 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727849AbfEGFgE (ORCPT ); Tue, 7 May 2019 01:36:04 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D9D8821479; Tue, 7 May 2019 05:36:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557207363; bh=8eSI9nxK7/A1OjFsFLV8LynX+vejKP5TFlSub7YZ5UU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ocjfS9eSZIQd2dt1GO6IeGSGcDM2jmQwmngcQssqN6cfAakKcW57IZnpor1k3/t+q SJZlxPBEScTMIVHaJU5n6/MGGYxzHV9Taf5pV1cTU5JWggJ8wqDsH6KNJUhLcyz9Fh N48+PrR4vYymwkrztM6nZQ7OB9XQekcBISeAaCno= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kangjie Lu , Dan Williams , Sasha Levin , linux-nvdimm@lists.01.org Subject: [PATCH AUTOSEL 4.19 05/81] libnvdimm/namespace: Fix a potential NULL pointer dereference Date: Tue, 7 May 2019 01:34:36 -0400 Message-Id: <20190507053554.30848-5-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190507053554.30848-1-sashal@kernel.org> References: <20190507053554.30848-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kangjie Lu [ Upstream commit 55c1fc0af29a6c1b92f217b7eb7581a882e0c07c ] In case kmemdup fails, the fix goes to blk_err to avoid NULL pointer dereference. Signed-off-by: Kangjie Lu Signed-off-by: Dan Williams Signed-off-by: Sasha Levin --- drivers/nvdimm/namespace_devs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 54d79837f7c6..73a444c41cde 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -2251,9 +2251,12 @@ static struct device *create_namespace_blk(struct nd_region *nd_region, if (!nsblk->uuid) goto blk_err; memcpy(name, nd_label->name, NSLABEL_NAME_LEN); - if (name[0]) + if (name[0]) { nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, GFP_KERNEL); + if (!nsblk->alt_name) + goto blk_err; + } res = nsblk_add_resource(nd_region, ndd, nsblk, __le64_to_cpu(nd_label->dpa)); if (!res) -- 2.20.1