af_netlink: Fix shift out of bounds in group mask calculation
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 v5.4.189 by commit 41249fff507387c3323b198d0052faed08b14de4, it was introduced in version v2.6.14 by commit f7fa9b10edbb9391bdd4ec8e8b3d621d0664b198. For more details please see the references link.