From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933056AbcBILPJ (ORCPT ); Tue, 9 Feb 2016 06:15:09 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:27416 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964845AbcBILPA (ORCPT ); Tue, 9 Feb 2016 06:15:00 -0500 Date: Tue, 9 Feb 2016 14:14:40 +0300 From: Dan Carpenter To: Alasdair Kergon , Mike Snitzer Cc: dm-devel@redhat.com, Shaohua Li , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [patch] dm: check for kmalloc failure in dm_init_request_based_blk_mq_queue() Message-ID: <20160209111440.GB23998@mwanda> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We can just return -ENOMEM if the kzalloc() fails. Fixes: 41b2facaf4ba ('dm: allocate blk_mq_tag_set rather than embed in mapped_device') Signed-off-by: Dan Carpenter diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 6b7e80e..1a5f879 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2736,6 +2736,8 @@ static int dm_init_request_based_blk_mq_queue(struct mapped_device *md, int err; md->tag_set = kzalloc(sizeof(struct blk_mq_tag_set), GFP_KERNEL); + if (!md->tag_set) + return -ENOMEM; md->tag_set->ops = &dm_mq_ops; md->tag_set->queue_depth = dm_get_blk_mq_queue_depth(); md->tag_set->numa_node = NUMA_NO_NODE;