GSD-2022-1003191 exfat: check if cluster num is valid

exfat: check if cluster num is valid 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 v5.17.13 by commit 7c58b14b6f9cde9f69e7fa053ab73f6e013a7131...