From: Christoph Hellwig <hch@lst.de>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: cem@kernel.org, r772577952@gmail.com, stable@vger.kernel.org,
hch@lst.de, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 4/4] xfs: fix UAF in xchk_btree_check_block_owner
Date: Wed, 21 Jan 2026 08:04:21 +0100 [thread overview]
Message-ID: <20260121070420.GC11640@lst.de> (raw)
In-Reply-To: <176897723630.207608.15659392786155037540.stgit@frogsfrogsfrogs>
On Tue, Jan 20, 2026 at 10:41:10PM -0800, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
>
> We cannot dereference bs->cur when trying to determine if bs->cur
> aliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed.
> Fix this by sampling before type before any freeing could happen.
> The correct temporal ordering was broken when we removed xfs_btnum_t.
Looks good:
Reviewed-by: Christoph Hellwig <hch@lst.de>
prev parent reply other threads:[~2026-01-21 7:04 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-21 6:40 [PATCHSET] xfs: syzbot fixes for online fsck Darrick J. Wong
2026-01-21 6:40 ` [PATCH 1/4] xfs: check the return value of xchk_xfile_*_descr calls Darrick J. Wong
2026-01-21 7:03 ` Christoph Hellwig
2026-01-21 18:22 ` Darrick J. Wong
2026-01-22 5:57 ` Christoph Hellwig
2026-01-22 18:57 ` Darrick J. Wong
2026-01-23 5:33 ` Christoph Hellwig
2026-01-23 7:00 ` Darrick J. Wong
2026-01-21 6:40 ` [PATCH 2/4] xfs: only call xf{array,blob}_destroy if we have a valid pointer Darrick J. Wong
2026-02-05 19:40 ` Chris Mason
2026-02-06 4:46 ` Darrick J. Wong
2026-01-21 6:40 ` [PATCH 3/4] xfs: check return value of xchk_scrub_create_subord Darrick J. Wong
2026-01-21 7:03 ` Christoph Hellwig
2026-01-21 6:41 ` [PATCH 4/4] xfs: fix UAF in xchk_btree_check_block_owner Darrick J. Wong
2026-01-21 7:04 ` Christoph Hellwig [this message]
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