diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 492a44d7b77e..24b44a271096 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1642,6 +1642,14 @@ static long vhost_vring_set_num_addr(struct vhost_dev *d,
 		BUG();
 	}
 
+	/*
+	 * The metadata cache holds the IOTLB mapping that backed the previous
+	 * desc/avail/used addresses and vring size, both of which are being
+	 * replaced here.  iotlb_access_ok() takes a cache hit as proof that the
+	 * region was validated, so the stale entries have to go.
+	 */
+	__vhost_vq_meta_reset(vq);
+
 	mutex_unlock(&vq->mutex);
 
 	return r;