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 v5.4.211 by commit 082da6a9c30fe0a00458ed36c28b603c86d516cb. For more details please see the references link.