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Zhang Wensheng authored
When 'index' is a big numbers, it may become negative which forced to 'int'. then 'index << part_shift' might overflow to a positive value that is not greater than '0xfffff', then sysfs might complains about duplicate creation. Because of this, move the 'index' judgment to the front will fix it and be better. Fixes: b0d9111a ("nbd: use an idr to keep track of nbd devices") Fixes: 940c2649 ("nbd: fix possible overflow for 'first_minor' in nbd_dev_add()") Signed-off-by:
Zhang Wensheng <zhangwensheng5@huawei.com> Reviewed-by:
Josef Bacik <josef@toxicpanda.com> Link: https://lore.kernel.org/r/20220310093224.4002895-1-zhangwensheng5@huawei.comSigned-off-by:
Jens Axboe <axboe@kernel.dk>
6d35d04a