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(parent: 4d49f1b) | patch
dm zoned: fix overflow when converting zone ID to sectors
authorDamien Le Moal <damien.lemoal@wdc.com>
Mon, 3 Jul 2017 06:44:58 +0000 (15:44 +0900)
committerMike Snitzer <snitzer@redhat.com>
Wed, 5 Jul 2017 20:08:47 +0000 (16:08 -0400)
commit3908c9839b1077e677ef9e92d2bce7f224519c59
tree4b385dcc6742ce62ba9aeb1bed662cda3993df91tree | snapshot (tar.gz zip)
parent4d49f1b4a1fcab16b6dd1c79ef14f2b6531d50a6commit | diff
dm zoned: fix overflow when converting zone ID to sectors

A zone ID is a 32 bits unsigned int which can overflow when doing the
bit shifts in dmz_start_sect().  With a 256 MB zone size drive, the
overflow happens for a zone ID >= 8192.

Fix this by casting the zone ID to a sector_t before doing the bit
shift.  While at it, similarly fix dmz_start_block().

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
drivers/md/dm-zoned-metadata.c diff | blob | blame | history