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 4/5] xfs_repair: skip the rmap and refcount btree checks when the levels are garbage
Date: Wed, 28 Oct 2020 07:34:10 +0000 [thread overview]
Message-ID: <20201028073410.GF32068@infradead.org> (raw)
In-Reply-To: <160375513815.879169.8550751453198927018.stgit@magnolia>
On Mon, Oct 26, 2020 at 04:32:18PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
>
> In validate_ag[fi], we should check that the levels of the rmap and
> refcount btrees are valid. If they aren't, we need to tell phase4 to
> skip the comparison between the existing and incore rmap and refcount
> data. The comparison routines use libxfs btree cursors, which assume
> that the caller validated bc_nlevels and will corrupt memory if we load
> a btree cursor with a garbage level count.
>
> This was found by examing a core dump from a failed xfs/086 invocation.
>
> 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:[~2020-10-28 21:52 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-26 23:31 [PATCH 0/5] xfsprogs: fixes for 5.10 Darrick J. Wong
2020-10-26 23:31 ` [PATCH 1/5] mkfs: allow users to specify rtinherit=0 Darrick J. Wong
2020-10-27 5:35 ` Allison Henderson
2020-10-27 17:22 ` Eric Sandeen
2020-10-27 17:24 ` [PATCH 1.5/5] mkfs: clarify valid "inherit" option values Eric Sandeen
2020-10-27 17:40 ` Darrick J. Wong
2020-10-27 17:49 ` Eric Sandeen
2020-10-28 7:32 ` Christoph Hellwig
2020-10-27 17:50 ` [PATCH 1.5/5 V2] " Eric Sandeen
2020-10-27 18:37 ` Darrick J. Wong
2020-10-28 7:32 ` [PATCH 1/5] mkfs: allow users to specify rtinherit=0 Christoph Hellwig
2020-10-26 23:32 ` [PATCH 2/5] xfs: remove unnecessary parameter from scrub_scan_estimate_blocks Darrick J. Wong
2020-10-27 5:35 ` Allison Henderson
2020-10-27 15:33 ` Darrick J. Wong
2020-10-29 18:33 ` Darrick J. Wong
2020-10-29 18:38 ` Allison Henderson
2020-10-28 7:33 ` Christoph Hellwig
2020-10-26 23:32 ` [PATCH 3/5] xfs_db: report ranges of invalid rt blocks Darrick J. Wong
2020-10-27 5:35 ` Allison Henderson
2020-10-28 7:33 ` Christoph Hellwig
2020-10-26 23:32 ` [PATCH 4/5] xfs_repair: skip the rmap and refcount btree checks when the levels are garbage Darrick J. Wong
2020-10-27 5:35 ` Allison Henderson
2020-10-28 7:34 ` Christoph Hellwig [this message]
2020-10-26 23:32 ` [PATCH 5/5] xfs_repair: correctly detect partially written extents Darrick J. Wong
2020-10-27 5:52 ` Allison Henderson
2020-10-28 7:35 ` Christoph Hellwig
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