From: Christoph Hellwig <hch@infradead.org>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: sandeen@sandeen.net, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 5/7] xfs_repair: fix handling of data blocks colliding with existing metadata
Date: Tue, 8 Sep 2020 15:52:51 +0100 [thread overview]
Message-ID: <20200908145251.GJ6039@infradead.org> (raw)
In-Reply-To: <159950114896.567790.10646736292763230158.stgit@magnolia>
On Mon, Sep 07, 2020 at 10:52:28AM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
>
> Prior to commit a406779bc8d8, any blocks in a data fork extent that
> collided with existing blocks would cause the entire data fork extent to
> be rejected. Unfortunately, the patch to add data block sharing support
> suppressed checking for any collision, including metadata. What we
> really wanted to do here during a check_dups==1 scan is to is check for
> specific collisions and without updating the block mapping data.
>
> So, move the check_dups test after the for-switch construction. This
> re-enables detecting collisions between data fork blocks and a
> previously scanned chunk of metadata, and improves the specificity of
> the error message that results.
>
> This was found by fuzzing recs[2].free=zeroes in xfs/364, though this
> patch alone does not solve all the problems that scenario presents.
>
> Fixes: a406779bc8d8 ("xfs_repair: handle multiple owners of data blocks")
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Looks good,
Reviewed-by: Christoph Hellwig <hch@lst.de>
next prev parent reply other threads:[~2020-09-08 19:55 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-07 17:51 [PATCH 0/7] xfs_repair: more fuzzer fixes Darrick J. Wong
2020-09-07 17:52 ` [PATCH 1/7] xfs_repair: don't crash on partially sparse inode clusters Darrick J. Wong
2020-09-08 14:43 ` Christoph Hellwig
2020-09-07 17:52 ` [PATCH 2/7] xfs_repair: fix error in process_sf_dir2_fixi8 Darrick J. Wong
2020-09-08 14:46 ` Christoph Hellwig
2020-09-07 17:52 ` [PATCH 3/7] xfs_repair: junk corrupt xattr root blocks Darrick J. Wong
2020-09-08 14:47 ` Christoph Hellwig
2020-09-07 17:52 ` [PATCH 4/7] xfs_repair: complain about unwritten extents when they're not appropriate Darrick J. Wong
2020-09-08 14:51 ` Christoph Hellwig
2020-09-07 17:52 ` [PATCH 5/7] xfs_repair: fix handling of data blocks colliding with existing metadata Darrick J. Wong
2020-09-08 14:52 ` Christoph Hellwig [this message]
2020-09-07 17:52 ` [PATCH 6/7] xfs_repair: throw away totally bad clusters Darrick J. Wong
2020-09-08 15:15 ` Christoph Hellwig
2020-09-29 15:34 ` Darrick J. Wong
2020-09-29 15:35 ` [PATCH v2 " Darrick J. Wong
2020-09-30 6:17 ` Christoph Hellwig
2020-09-07 17:52 ` [PATCH 7/7] xfs_repair: use libxfs_verify_rtbno to verify rt extents Darrick J. Wong
2020-09-08 14:54 ` Christoph Hellwig
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