linux-kernel - Re: [PATCH] To add NULL pointer check

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Date:	Wed, 3 Apr 2013 13:25:52 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	jaegeuk.kim@...sung.com
Cc:	P J P <ppandit@...hat.com>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, Petr Matousek <pmatouse@...hat.com>
Subject: Re: [PATCH] To add NULL pointer check

2013/4/3, Jaegeuk Kim <jaegeuk.kim@...sung.com>:
> Hi,
> Thank you for your contribution.
>
> As I consider the null pointer check, generic_writepages() originally
> does so.
> Therefore, I think f2fs_write_data_pages() is better to handle this.
> Please review the modified patch.
> Thanks,
>
> ---
> From d3c811a51c7062fb1b66bec910ed346447c02032 Mon Sep 17 00:00:00 2001
> From: P J P <ppandit@...hat.com>
> Date: Wed, 3 Apr 2013 11:38:00 +0900
> Subject: [PATCH] f2fs: add NULL pointer check
> Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
> linux-f2fs-devel@...ts.sourceforge.net
>
> Commit - fa9150a84c - replaces a call to generic_writepages() in
> f2fs_write_data_pages() with write_cache_pages(), with a function
> pointer
> argument pointing to routine: __f2fs_writepage.
>
>   ->
> https://git.kernel.org/linus/fa9150a84ca333f68127097c4fa1eda4b3913a22
>
>   This patch adds a NULL pointer check in f2fs_write_data_pages() to
> avoid
>   a possible NULL pointer dereference, in case if -
> mapping->a_ops->writepage -
>   is NULL.
Yes, I  agree. Looks better!
Reviewed-by: Namjae Jeon <namjae.jeon@...sung.com>

Thanks.
>
> Signed-off-by: P J P <ppandit@...hat.com>
> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
> ---
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