Pull cgroup fix from Tejun Heo:
"This is a high priority but low risk fix for a cgroup1 bug where
rename(2) can change a cgroup's name to something which can break
parsing of /proc/PID/cgroup"
* 'for-5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup1: don't allow '\n' in renaming