- Set the v_object pointer after a successful VOP_OPEN(). This isn't a

perfect solution as the lower vm object can change at unpredictable times
   if our lower vp happens to be on another unionfs, etc.

Submitted by:	Oleg Sharoiko <os@rsu.ru>

sys/fs/unionfs/union_vnops.c

@@ -747,7 +747,8 @@ union_open(ap)
 
 	if (error == 0)
 		error = VOP_OPEN(tvp, mode, cred, td, -1);
-
+	if (error == 0)
+		ap->a_vp->v_object = tvp->v_object;
 	/*
 	 * Release any locks held.
 	 */