On Tue, Aug 23, 2022 at 01:41:46PM +0800, Jing-Ting Wu wrote: > Root cause: > The rebind_subsystems() is no lock held when move css object from A > list to B list,then let B's head be treated as css node at > list_for_each_entry_rcu(). > > Solution: > Add grace period before invalidating the removed rstat_css_node. > > Reported-by: Jing-Ting Wu <jing-ting.wu@xxxxxxxxxxxx> > Suggested-by: Michal Koutný <mkoutny@xxxxxxxx> > Signed-off-by: Jing-Ting Wu <jing-ting.wu@xxxxxxxxxxxx> > Tested-by: Jing-Ting Wu <jing-ting.wu@xxxxxxxxxxxx> > Link: https://lore.kernel.org/linux-arm-kernel/d8f0bc5e2fb6ed259f9334c83279b4c011283c41.camel@xxxxxxxxxxxx/T/ Applied to cgroup/for-6.0-fixes w/ stable tag added. Thanks. -- tejun
