diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 4e6ecd260236..d89ffa44516a 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1730,7 +1730,7 @@ static void _vm_unmap_aliases(unsigned long start, unsigned long end, int flush)
 		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;