linux-ext4 - Re: [PATCH] ext4: Avoid memory leak of ext4_groupinfo_caches in ext4_groupinfo_create

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Message-ID: <20110711223745.GS28763@thunk.org>
Date:	Mon, 11 Jul 2011 18:37:45 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Tao Ma <tm@....ma>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: Avoid memory leak of ext4_groupinfo_caches in
 ext4_groupinfo_create_slab.

On Mon, Jul 11, 2011 at 11:26:55PM +0800, Tao Ma wrote:
> From: Tao Ma <boyu.mt@...bao.com>
> 
> In ext4_groupinfo_create_slab, we create ext4_groupinfo_caches within
> ext4_grpinfo_slab_create_mutex, but set it outside the lock, and there
> does exist some case that we may create it twice and causes a memory
> leak. So set it before we call mutex_unlock.
> 
> Signed-off-by: Tao Ma <boyu.mt@...bao.com>

Applied, with a slightly reworded one-line summary:

    ext4: fix a race which could leak memory in ext4_groupinfo_create_slab()

    	      	     	   	      	     	- Ted
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