diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 26ea78ae3ccac4f83dd1e7309226337185f54b7a..9c59854d14e9eed7fc6e0262b3d5b6082f859ea8 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6407,6 +6407,7 @@ static int select_idle_sibling(struct task_struct *p, int prev, int target)
 	 * pattern is IO completions.
 	 */
 	if (is_per_cpu_kthread(current) &&
+	    in_task() &&
 	    prev == smp_processor_id() &&
 	    this_rq()->nr_running <= 1) {
 		SET_STAT(found_idle_cpu_easy);