]> www.infradead.org Git - nvme.git/commit
block: add check of 'minors' and 'first_minor' in device_add_disk()
authorLi Nan <linan122@huawei.com>
Tue, 19 Dec 2023 07:59:42 +0000 (15:59 +0800)
committerJens Axboe <axboe@kernel.dk>
Tue, 19 Dec 2023 15:23:12 +0000 (08:23 -0700)
commit4c434392c4777881d01beada6701eff8c76b43fe
treef23457479d752a1591637c20885909997931742e
parent6c9b97085c473e380e57cf33c95d2c74444b2a5d
block: add check of 'minors' and 'first_minor' in device_add_disk()

'first_minor' represents the starting minor number of disks, and
'minors' represents the number of partitions in the device. Neither
of them can be greater than MINORMASK + 1.

Commit e338924bd05d ("block: check minor range in device_add_disk()")
only added the check of 'first_minor + minors'. However, their sum might
be less than MINORMASK but their values are wrong. Complete the checks now.

Fixes: e338924bd05d ("block: check minor range in device_add_disk()")
Signed-off-by: Li Nan <linan122@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231219075942.840255-1-linan666@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/genhd.c