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-rw-r--r--kernel/cpuset.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index e472fe139192..33eee16addb8 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;
}