tree 8de644b8fb941ee475163b59ad76506a647a9d85
parent e5ced8ebb10c20a3b349bd798b69ccabd3b25d21
author Tejun Heo <tj@kernel.org> 1399994910 -0400
committer Tejun Heo <tj@kernel.org> 1399994910 -0400

cgroup: fix rcu_read_lock() leak in update_if_frozen()

While updating cgroup_freezer locking, 68fafb77d827 ("cgroup_freezer:
replace freezer->lock with freezer_mutex") introduced a bug in
update_if_frozen() where it returns with rcu_read_lock() held.  Fix it
by adding rcu_read_unlock() before returning.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: kbuild test robot <fengguang.wu@intel.com>