REDHAT-BUG-1912683: Medium severity red hat kernel-devel vulnerability

There is vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIGBPFSYSCALL=y , CONFIGBPF=y , CONFIGCGROUPS=y , CONFIGCGROUPBPF=y , CONFIGHARDENEDUSERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in cgroupbpfrunfiltergetsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation.