GSD-2022-1004261 afs: Fix dynamic root getattr

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 v5.18.8 by commit 7844ceada44eca740d31beb3d97b8511b1ca0a9b, it was...