xfs: strengthen the "is cow staging" helpers in scrub

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LOLLM pointed out a bug in both of the refcount scrub predicates that
determine if a range of blocks is marked as CoW staging in the btree.
While it compares blockcount < len, this isn't enough to determine that
the CoW staging record is at least as large as the range passed into the
helper.  Fix both of them.

Cc: stable@vger.kernel.org # v4.16
Fixes: f6d5fc21fd ("xfs: cross-reference refcount btree during scrub")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Assisted-by: LOLLM # finding obvious bugs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

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This commit is contained in:

Darrick J. Wong 2026-09-02 22:51:36 -07:00 • committed by Carlos Maiolino

parent c3085f6c7c

commit 0d43368844

2 changed files with 10 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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6

fs/xfs/scrub/refcount.c

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6

fs/xfs/scrub/rtrefcount.c

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