diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c
index 6958aa713c67..16f4e67beee8 100644
--- a/mm/kasan/quarantine.c
+++ b/mm/kasan/quarantine.c
@@ -355,7 +355,12 @@ void kasan_quarantine_remove_cache(struct kmem_cache *cache)
 	 */
 	on_each_cpu(per_cpu_remove_cache, cache, 1);
 
-	for_each_online_cpu(cpu) {
+	/*
+	 * A CPU can go offline after on_each_cpu() returns, leaving cache
+	 * objects on that CPU's shrink list. Scan all possible CPUs to
+	 * drain those lists.
+	 */
+	for_each_possible_cpu(cpu) {
 		sq = per_cpu_ptr(&shrink_qlist, cpu);
 		raw_spin_lock_irqsave(&sq->lock, flags);
 		qlist_move_cache(&sq->qlist, &to_free, cache);