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bd910fdeb0
When allocating a record, we round up the allocation size to a multiple of 8. In this case, any padding bytes should be zeroed, otherwise the contents of uninitialized memory are written to the ZIL. This was found using KMSAN. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Alexander Motin <mav@FreeBSD.org> Signed-off-by: Mark Johnston <markj@FreeBSD.org> Closes #12383