Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756228Ab3FDQIq (ORCPT ); Tue, 4 Jun 2013 12:08:46 -0400 Received: from mail-pb0-f52.google.com ([209.85.160.52]:57961 "EHLO mail-pb0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755425Ab3FDQIn (ORCPT ); Tue, 4 Jun 2013 12:08:43 -0400 From: Jiang Liu To: Greg Kroah-Hartman , Nitin Gupta , Minchan Kim , Jerome Marchand Cc: Yijing Wang , Jiang Liu , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 04/10] zram: destroy all devices on error recovery path in zram_init() Date: Wed, 5 Jun 2013 00:06:02 +0800 Message-Id: <1370361968-8764-4-git-send-email-jiang.liu@huawei.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1370361968-8764-1-git-send-email-jiang.liu@huawei.com> References: <1370361968-8764-1-git-send-email-jiang.liu@huawei.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1996 Lines: 71 On error recovery path of zram_init(), it leaks the zram device object causing the failure. So change create_device() to free allocated resources on error path. Signed-off-by: Jiang Liu Cc: stable@vger.kernel.org --- drivers/staging/zram/zram_drv.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c index 847d207..88a53f4 100644 --- a/drivers/staging/zram/zram_drv.c +++ b/drivers/staging/zram/zram_drv.c @@ -595,7 +595,7 @@ static const struct block_device_operations zram_devops = { static int create_device(struct zram *zram, int device_id) { - int ret = 0; + int ret = -ENOMEM; init_rwsem(&zram->lock); init_rwsem(&zram->init_lock); @@ -605,7 +605,6 @@ static int create_device(struct zram *zram, int device_id) if (!zram->queue) { pr_err("Error allocating disk queue for device %d\n", device_id); - ret = -ENOMEM; goto out; } @@ -615,11 +614,9 @@ static int create_device(struct zram *zram, int device_id) /* gendisk structure */ zram->disk = alloc_disk(1); if (!zram->disk) { - blk_cleanup_queue(zram->queue); pr_warn("Error allocating disk structure for device %d\n", device_id); - ret = -ENOMEM; - goto out; + goto out_free_queue; } zram->disk->major = zram_major; @@ -648,11 +645,17 @@ static int create_device(struct zram *zram, int device_id) &zram_disk_attr_group); if (ret < 0) { pr_warn("Error creating sysfs group"); - goto out; + goto out_free_disk; } zram->init_done = 0; + return 0; +out_free_disk: + del_gendisk(zram->disk); + put_disk(zram->disk); +out_free_queue: + blk_cleanup_queue(zram->queue); out: return ret; } -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/