diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index e24ecd3..e21e020 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1291,6 +1291,12 @@ static struct task_struct *pick_next_task_fair(struct rq *rq)
 
 	do {
 		se = pick_next_entity(cfs_rq);
+
+		if (unlikely(!se))
+			printk(KERN_ERR "BUG: se == NULL but nr_running (%ld), load (%ld),"
+					" rq-nr_running (%ld), rq-load (%ld)\n",
+				cfs_rq->nr_running, cfs_rq->load.weight, rq->nr_running, rq->load.weight);
+
 		cfs_rq = group_cfs_rq(se);
 	} while (cfs_rq);