On Mon, Jan 04, 2021 at 03:10:44PM +0900, Damien Le Moal wrote: > commit 0ebcdd702f49aeb0ad2e2d894f8c124a0acc6e23 upstream. > > For a null_blk device with zoned mode enabled is currently initialized > with a number of zones equal to the device capacity divided by the zone > size, without considering if the device capacity is a multiple of the > zone size. If the zone size is not a divisor of the capacity, the zones > end up not covering the entire capacity, potentially resulting is out > of bounds accesses to the zone array. > > Fix this by adding one last smaller zone with a size equal to the > remainder of the disk capacity divided by the zone size if the capacity > is not a multiple of the zone size. For such smaller last zone, the zone > capacity is also checked so that it does not exceed the smaller zone > size. Now queued up, thanks. greg k-h
