um: add "noreboot" command line option for PANIC_TIMEOUT=-1 setups
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 v5.15.63 by commit e799817b67b3f966a5ef0030a14f49889c645d6d. For more details please see the references link.