diff --git a/sys/geom/geom_vfs.c b/sys/geom/geom_vfs.c
--- a/sys/geom/geom_vfs.c
+++ b/sys/geom/geom_vfs.c
@@ -302,12 +302,16 @@
 {
 	struct g_geom *gp;
 	struct g_vfs_softc *sc;
+	struct vnode *vp;
 
 	g_topology_assert();
 
 	gp = cp->geom;
 	sc = gp->softc;
+	vp = cp->private;
+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
 	bufobj_invalbuf(sc->sc_bo, V_SAVE, 0, 0);
+	VOP_UNLOCK(vp);
 	sc->sc_bo->bo_private = cp->private;
 	gp->softc = NULL;
 	mtx_destroy(&sc->sc_mtx);