diff -r 6472342c8ab0 tools/python/xen/lowlevel/xs/xs.c
--- a/tools/python/xen/lowlevel/xs/xs.c	Wed Sep 30 08:51:21 2009 +0100
+++ b/tools/python/xen/lowlevel/xs/xs.c	Wed Sep 30 14:08:27 2009 +0200
@@ -324,6 +324,7 @@ static PyObject *xspy_set_permissions(Xs
 
     xs_transaction_t th;
     char *thstr;
+    PyObject *ret = NULL;
 
     if (!xh)
         goto exit;
@@ -380,14 +381,13 @@ static PyObject *xspy_set_permissions(Xs
         goto exit;
     }
 
-    free(xsperms);
     Py_INCREF(Py_None);
-    return Py_None;
+    ret = Py_None;
 
  exit:
     Py_XDECREF(tuple0);
     free(xsperms);
-    return NULL;
+    return ret;
 }
 
 #define xspy_watch_doc "\n"						\