blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd
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 v5.14.9 by commit 7c2c69e010431b0157c9454adcdd2305809bf9fb. For more details please see the references link.