linux-ext4 - Re: [PATCH] resize: check s_log_groups_per

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Date:	Sat, 3 Apr 2010 22:17:36 -0400
From:	tytso@....edu
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>,
	Alessandro Polverini <alex@...bles.it>,
	Christoph Biedl <bugzilla.kernel.bpeb@...chmal.in-ulm.de>
Subject: Re: [PATCH] resize: check s_log_groups_per_flex before accessing
 flex groups

On Sat, Mar 27, 2010 at 02:32:16PM -0500, Eric Sandeen wrote:
> This is for kernel.org bug:
> 
> #13549, Kernel oops while online resizing of an ext4 filesystem
> 
> if groups_per_flex < 2, sbi->s_flex_groups[] doesn't get filled out,
> and every other access to this first tests s_log_groups_per_flex;
> same thing needs to happen in resize or we'll wander off into
> a null pointer.

Added to the ext4 patch queue, thanks.

				- Ted
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