afs: Fix dynamic root getattr
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 v5.4.202 by commit e3a232e5767051483ffad4cef7d0a89d292a192b, it was introduced in version v5.4.196 by commit dba1941f5bc3de6b460685155b89ae1182824fc8. For more details please see the references link.