On Wed, Aug 14, 2024 at 02:05:59PM +0200, Michal Koutný wrote:
> Hello.
>
> On Tue, Jul 30, 2024 at 05:42:04PM GMT, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > ...
> > Fix this problem by using rcu_read_lock in proc_cpuset_show().
> > As cgroup_root is kfree_rcu after commit d23b5c577715
> > ("cgroup: Make operations on the cgroup root_list RCU safe"),
> > css->cgroup won't be freed during the critical section.
> > To call cgroup_path_ns_locked, css_set_lock is needed, so it is safe to
> > replace task_get_css with task_css.
>
> This backport requires also the mentioned d23b5c577715 to be
> effective (I noticed that is missing in 6.6.y at the moment).
It is in 6.6.44.
thanks,
greg k-h
