linux-ext4 - Re: [PATCH 1/6] libext2fs: ext2fs_dup_handle should not alias MMP buffers

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Message-ID: <20130909143959.GE6059@thunk.org>
Date:	Mon, 9 Sep 2013 10:39:59 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	"Darrick J. Wong" <darrick.wong@...cle.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 1/6] libext2fs: ext2fs_dup_handle should not alias MMP
 buffers

On Wed, Aug 28, 2013 at 05:43:51PM -0700, Darrick J. Wong wrote:
> It turns out that resize2fs uses ext2fs_dup_handle to duplicate fs handles.  If
> MMP is enabled, this causes both handles to share MMP buffers, which is bad
> news when it comes time to free both handles.  Change the code to (we hope) fix
> this.  This prevents resize2fs from failing with a double-free error when
> handed a MMP filesystem.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>

Thanks, applied.

					- Ted
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