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(parent: ddf6351) | patch
nbd: Add the maximum limit of allocated index in nbd_dev_add
authorZhong Jinghua <zhongjinghua@huawei.com>
Mon, 5 Jun 2023 12:21:59 +0000 (20:21 +0800)
committerJens Axboe <axboe@kernel.dk>
Wed, 7 Jun 2023 13:50:48 +0000 (07:50 -0600)
commitf12bc113ce904777fd6ca003b473b427782b3dde
treedc0959ce6bb5f8d3116c864c844360332e1d6eb6tree | snapshot
parentddf63516d8d37528dc6834c7f19b55084e956068commit | diff
nbd: Add the maximum limit of allocated index in nbd_dev_add

If the index allocated by idr_alloc greater than MINORMASK >> part_shift,
the device number will overflow, resulting in failure to create a block
device.

Fix it by imiting the size of the max allocation.

Signed-off-by: Zhong Jinghua <zhongjinghua@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230605122159.2134384-1-zhongjinghua@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/block/nbd.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git