diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index 6357160d466ab174f7fbe9f393f0ea97f99b84eb..91da7e44d5d4f4200ddc49c1896bb86662f5862a 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -343,6 +343,9 @@ int pvcalls_front_socket(struct socket *sock)
 
 static void free_active_ring(struct sock_mapping *map)
 {
+	if (!map->active.ring)
+		return;
+
 	free_pages((unsigned long)map->active.data.in,
 			map->active.ring->ring_order);
 	free_page((unsigned long)map->active.ring);