On Wed 12-02-14 17:26:40, Li Zefan wrote:

On 2014/2/12 17:12, Michal Hocko wrote:

quoted

Li has pointed out that my previous backport was not correct because
err_unlock label releases a reference to supperblock which was not taken
before idr_alloc. I've also removed cgroup_mutex from free_css_id as per
Li.
Fixed in this version.

Looks good to me!

Thanks for double checking.

Are you going to send it to stable mailing list after the fix hits mainline
or use it internally?

I plan to have it tested internally and then send it later on when
stable FAILED to apply mail arrives. Unless you want to send it yourself
of course.

It has small conflicts with this patch that will also be backported to 3.12:

https://git.kernel.org/cgit/linux/kernel/git/tj/cgroup.git/commit/kernel/cgroup.c?h=for-3.14-fixes&id=b58c89986a77a23658682a100eb15d8edb571ebb

Thanks for the heads up. Should be trivial to resolve.
-- 
Michal Hocko
SUSE Labs