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

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Message-ID: <eac2fbfe-5565-96ad-68cb-11efa8af2ec8@huaweicloud.com>
Date: Mon, 29 Jan 2024 21:27:59 +0800
From: Li Nan <linan666@...weicloud.com>
To: linan666@...weicloud.com, richard@....at, miquel.raynal@...tlin.com,
 vigneshr@...com
Cc: linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
 yukuai3@...wei.com, yi.zhang@...wei.com, houtao1@...wei.com,
 yangerkun@...wei.com
Subject: Re: [PATCH v2] ubi: block: fix memleak in ubiblock_create()

friendly ping ...

在 2023/12/8 15:46, linan666@...weicloud.com 写道:
> 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.
> 
> Signed-off-by: Li Nan <linan122@...wei.com>
> Reviewed-by: Zhihao Cheng <chengzhihao1@...wei.com>
> ---
> Changes in v2:
>   - modify the description of the problem in log
> 
>   drivers/mtd/ubi/block.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
> index 309a42aeaa4c..654bd7372cd8 100644
> --- a/drivers/mtd/ubi/block.c
> +++ b/drivers/mtd/ubi/block.c
> @@ -434,7 +434,7 @@ int ubiblock_create(struct ubi_volume_info *vi)
>   	list_del(&dev->list);
>   	idr_remove(&ubiblock_minor_idr, gd->first_minor);
>   out_cleanup_disk:
> -	put_disk(dev->gd);
> +	put_disk(gd);
>   out_free_tags:
>   	blk_mq_free_tag_set(&dev->tag_set);
>   out_free_dev:

-- 
Thanks,
Nan