xfs: zero inode fork buffer at allocation

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When we first allocate or resize an inline inode fork, we round up
the allocation to 4 byte alingment to make journal alignment
constraints. We don't clear the unused bytes, so we can copy up to
three uninitialised bytes into the journal. Zero those bytes so we
only ever copy zeros into the journal.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

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Dave Chinner 2022-05-04 11:44:55 +10:00 • committed by Dave Chinner

parent a44a027a8b

commit cb512c9216

1 changed files with 9 additions and 3 deletions

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fs/xfs/libxfs/xfs_inode_fork.c

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