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Date:	Wed, 26 Sep 2012 12:50:07 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Dmitry Monakhov <dmonakhov@...nvz.org>
Cc:	linux-ext4@...r.kernel.org, a-fujita@...jp.nec.com
Subject: Re: [PATCH 3/4] ext4: basic bug shield for move_extent_per_page

Applied, thanks.

I added one sanity check:

> +	for(bh = head, block_start = 0; bh != head || !block_start;
> +	    block++, block_start = block_end, bh = bh->b_this_page) {
  	    ...
		BUG_ON(nr >= MAX_BUF_PER_PAGE);
> +		arr[nr++] = bh;
> +	}

...just to make sure a corrupted link list on b_this_page can't cause
a on-stack array overrun.

						- Ted
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