linux-ext4 - Re: [PATCH 3/6] e2fsck: Fix incorrect bbitmap checksum failure caused by integer overflow

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Message-ID: <20130916134227.GC4457@thunk.org>
Date:	Mon, 16 Sep 2013 09:42:27 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	"Darrick J. Wong" <darrick.wong@...cle.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 3/6] e2fsck: Fix incorrect bbitmap checksum failure
 caused by integer overflow

On Wed, Aug 28, 2013 at 05:44:04PM -0700, Darrick J. Wong wrote:
> On a filesystem with more than 2^32 blocks, the block group checksum test will
> fail because "i" (the group number) is a 32-bit quantity that is used to
> calculate the group's block bitmap block number.  Unfortunately, "i" is not
> automatically promoted to 64-bit for this calculation and overflows.  When this
> happens, e2fsck will incorrectly report bitmap checksum errors.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>

Applied to the next branch, thanks.

						- Ted
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