nbd: Fix hung when signal interrupts nbdstartdevice_ioctl()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.262 by commit c7b4641bd2395c2f3cd3b0a0cbf292ed9d489398. For more details please see the references link.