fs: jfs: fix shift-out-of-bounds in dbDiscardAG
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 v6.0.16 by commit ab5cd3d62c2493eca3337e7d0178cc7bd819ca64. For more details please see the references link.