linux-kernel - Re: [PATCH v2] ubi: block: fix memleak in ubiblock

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Date: Mon, 15 Apr 2024 09:33:22 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: linan666@...weicloud.com
Cc: richard@....at, miquel.raynal@...tlin.com, vigneshr@...com,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linan122@...wei.com, yukuai3@...wei.com, yi.zhang@...wei.com,
	houtao1@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH v2] ubi: block: fix memleak in ubiblock_create()

On Fri, Dec 08, 2023 at 03:46:29PM +0800, linan666@...weicloud.com wrote:
> From: Li Nan <linan122@...wei.com>
> 
> If idr_alloc() fails, dev->gd will be put after goto out_cleanup_disk in
> ubiblock_create(), but dev->gd has not been assigned yet at this time, and
> 'gd' will not be put anymore. Fix it by putting 'gd' directly.
> 

There is another invalid reference to dev->gd if blk_mq_alloc_tag_set()
fails.

	dev_err(disk_to_dev(dev->gd), "blk_mq_alloc_tag_set failed");
                            ^^^^^^^

regards,
dan carpenter