Messages in this thread | | | Date | Thu, 31 Mar 2022 10:07:35 -0400 | From | Josef Bacik <> | Subject | Re: [PATCH -next] nbd: fix possible overflow on 'first_minor' in nbd_dev_add() |
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On Thu, Mar 10, 2022 at 05:32:24PM +0800, Zhang Wensheng wrote: > 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: b0d9111a2d53 ("nbd: use an idr to keep track of nbd devices") > Fixes: 940c264984fd ("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>
Thanks,
Josef
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