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In hypothetical case of non-linear ABD with single segment, multiple to page size but not aligned to it, vdev_geom_fill_unmap_cb() could fill one page less into bio_ma array. I am not sure it is exploitable, but better to be safe than sorry. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Reported-by: Mark Johnston <markj@FreeBSD.org> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Closes #13345 |
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