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Date: Fri, 9 Mar 2012 21:13:16 -0500
From: Benjamin LaHaise <bcrl@kvack.org>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] aio: fix the "too late munmap()" race
Message-ID: <20120310021316.GA22880@kvack.org>
References: <20120307051634.GR23916@ZenIV.linux.org.uk> <20120308175119.GY23916@ZenIV.linux.org.uk>
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On Thu, Mar 08, 2012 at 05:51:19PM +0000, Al Viro wrote:
> Since actual freeing of these suckers is RCU-delayed, we don't need to
> bump ioctx refcount when request goes into list for async removal.
> All we need is rcu_read_lock held just over the ->ctx_lock-protected
> area in aio_fput_routine().
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>

Looks good.  As with the previous patch, I instrumented and tested the code 
to trigger fput_work() with no issues encountered.

		-ben