cgroup: Fix memory leak caused by missing cgroup_bpf_offline

cgroup: Fix memory leak caused by missing cgroup_bpf_offline

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 v5.14.16 by commit b529f88d93884cf8ccafda793ee3d27b82fa578d, it was introduced in version v5.10 by commit 2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e. For more details please see the references link.