[PATCH 5.4.y 0/2] Missing cgroup RCU patches for 5.4.y

[Siddh Raman Pant]

5.4 doesn't have commit backported which introduces RCU for cgroup
root_list, but has a commit fixing a UAF (and thus a CVE) which depends
on it.

Thus, we need to backport the original commits. See thread:
https://lore.kernel.org/all/xr93ikus2nd1.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/

This patch series backports the requisite commits to 5.4.y, which are
picked up from the above mentioned thread.

Thanks,
Siddh

Waiman Long (1):
  cgroup: Move rcu_head up near the top of cgroup_root

Yafang Shao (1):
  cgroup: Make operations on the cgroup root_list RCU safe

 include/linux/cgroup-defs.h     |  7 ++++---
 kernel/cgroup/cgroup-internal.h |  3 ++-
 kernel/cgroup/cgroup.c          | 23 ++++++++++++++++-------
 3 files changed, 22 insertions(+), 11 deletions(-)

-- 
2.45.2