diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 53d2917a798c211699dda189e86d9bf9a1f9587a..d600566fb8e3c78d123b7d54e71b517dd572ed2d 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -675,7 +675,8 @@ static inline int alloc_cpumasks(struct cpuset *cs, struct tmpmasks *tmp)
 
 #ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY
 free_four:
-	free_cpumask_var(*pmask4);
+	if (pmask4)
+		free_cpumask_var(*pmask4);
 #endif
 free_three:
 	free_cpumask_var(*pmask3);