Re: [PATCH] cgroup: fix cgroup_get_from_id

Tejun Heo
2022-09-23T17:29:52Z

On Fri, Sep 23, 2022 at 07:51:19PM +0800, Ming Lei wrote:
> cgroup has to be one kernfs dir, otherwise kernel panic is caused,
> especially cgroup id is provide from userspace.
>
> Reported-by: Marco Patalano <mpatalan-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> Fixes: 6b658c4863c1 ("scsi: cgroup: Add cgroup_get_from_id()")
> Cc: Muneendra <muneendra.kumar-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
> Signed-off-by: Ming Lei <ming.lei-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>

Applied to cgroup/for-6.0-fixes with the subject changed to "cgroup:
cgroup_get_from_id() must check the looked-up kn is a directory" and stable
cc'd.

Thanks.

--
tejun