linux-kernel - Re: [PATCH] f2fs: fix to release inode page in get_new_data

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Date:	Fri, 10 Jul 2015 17:17:15 -0700
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	Chao Yu <chao2.yu@...sung.com>
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] f2fs: fix to release inode page in get_new_data_page

Hi Chao,

On Thu, Jul 09, 2015 at 06:20:08PM +0800, Chao Yu wrote:
> get_new_data_page should release inode page when we encounter any
> error in its procedure, but there is one error path didn't cover
> this, fix it.

Nice catch.
But, I think we should fix its caller:

in init_inode_metadata(),
	err = make_empty_dir();
	if (err)
		goto put_error;
		---------------
Thanks,

> 
> Signed-off-by: Chao Yu <chao2.yu@...sung.com>
> ---
>  fs/f2fs/data.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 08dfdc6..ea8898b 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -397,8 +397,10 @@ struct page *get_new_data_page(struct inode *inode,
>  	int err;
>  repeat:
>  	page = grab_cache_page(mapping, index);
> -	if (!page)
> +	if (!page) {
> +		f2fs_put_page(ipage, 1);
>  		return ERR_PTR(-ENOMEM);
> +	}
>  
>  	set_new_dnode(&dn, inode, ipage, NULL, 0);
>  	err = f2fs_reserve_block(&dn, index);
> -- 
> 2.4.2
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