cgroup: Add missing cpusreadlock() to cgroupattachtask_all()
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 v5.15.70 by commit 5db17805b6ba4c34dab303f49aea3562fc25af75, it was introduced in version v5.15.68 by commit 3bf4bf54069f9b62a54988e5d085023c17a66c90. For more details please see the references link.