1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index e472fe13919..33eee16addb 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1840,8 +1840,10 @@ static void cpuset_post_clone(struct cgroup_subsys *ss,
         cs = cgroup_cs(cgroup);
         parent_cs = cgroup_cs(parent);
 
+        mutex_lock(&callback_mutex);
         cs->mems_allowed = parent_cs->mems_allowed;
         cpumask_copy(cs->cpus_allowed, parent_cs->cpus_allowed);
+        mutex_unlock(&callback_mutex);
         return;
 }