diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index a7df319c2e9a6f0cafd3d9095f9d26ef84400528..9538a12d42d666b29347fb619603cbd9a2643a55 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -4550,6 +4550,10 @@ struct task_struct *css_task_iter_next(struct css_task_iter *it)
 
 	spin_lock_irq(&css_set_lock);
 
+	/* @it may be half-advanced by skips, finish advancing */
+	if (it->flags & CSS_TASK_ITER_SKIPPED)
+		css_task_iter_advance(it);
+
 	if (it->task_pos) {
 		it->cur_task = list_entry(it->task_pos, struct task_struct,
 					  cg_list);