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
