linux-ext4 - Re: [PATCH] ext2: add missing brelse() in ext2

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Date:   Sun, 16 Jun 2019 09:45:21 -0700
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     Chengguang Xu <cgxu519@...o.com.cn>
Cc:     jack@...e.com, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext2: add missing brelse() in ext2_iget()

On Sun, Jun 16, 2019 at 11:08:01PM +0800, Chengguang Xu wrote:
> Add missing brelse() on error path of ext2_iget().
> 
> Signed-off-by: Chengguang Xu <cgxu519@...o.com.cn>

/me wonders if the brelse ought to be moved down to bad_inode so that
each error branch only has to set @ret and then jump (thereby
eliminating the possibility of making this mistake again), but for a
oneliner quick fix I guess it's fine:

Reviewed-by: Darrick J. Wong <darrick.wong@...cle.com>

--D

> ---
>  fs/ext2/inode.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
> index e474127dd255..fb3611f02051 100644
> --- a/fs/ext2/inode.c
> +++ b/fs/ext2/inode.c
> @@ -1473,6 +1473,7 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
>  	else
>  		ei->i_dir_acl = le32_to_cpu(raw_inode->i_dir_acl);
>  	if (i_size_read(inode) < 0) {
> +		brelse(bh);
>  		ret = -EFSCORRUPTED;
>  		goto bad_inode;
>  	}
> -- 
> 2.21.0
> 
> 
>