Re: [PATCH] nbd: make the config put is called before the notifying the waiter

[Jens Axboe <axboe@xxxxxxxxx>]

On 10/13/20 8:45 PM, xiubli@xxxxxxxxxx wrote:
> From: Xiubo Li <xiubli@xxxxxxxxxx>
> 
> There has one race case for ceph's rbd-nbd tool. When do mapping
> it may fail with EBUSY from ioctl(nbd, NBD_DO_IT), but actually
> the nbd device has already unmaped.
> 
> It dues to if just after the wake_up(), the recv_work() is scheduled
> out and defers calling the nbd_config_put(), though the map process
> has exited the "nbd->recv_task" is not cleared.

Applied, thanks.

-- 
Jens Axboe