diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 12c68353feebf75a747281dc8f76267d7806fe73..881d0c79a6d0b85c3970a9c50538dbe6636e6697 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1631,7 +1631,7 @@ void vm_unmap_aliases(void)
 		rcu_read_lock();
 		list_for_each_entry_rcu(vb, &vbq->free, free_list) {
 			spin_lock(&vb->lock);
-			if (vb->dirty) {
+			if (vb->dirty && vb->dirty != VMAP_BBMAP_BITS) {
 				unsigned long va_start = vb->va->va_start;
 				unsigned long s, e;