From 96a237c8efdc32ef531d488d3f771084ff21086a Mon Sep 17 00:00:00 2001
From: Jay Sorg <jay.sorg@gmail.com>
Date: Fri, 11 Dec 2015 20:05:40 -0800
Subject: [PATCH] libxrdp: rail fix for when no flags are set

---
 libxrdp/xrdp_orders_rail.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libxrdp/xrdp_orders_rail.c b/libxrdp/xrdp_orders_rail.c
index 91d4b607..3c5d5b63 100644
--- a/libxrdp/xrdp_orders_rail.c
+++ b/libxrdp/xrdp_orders_rail.c
@@ -333,6 +333,12 @@ xrdp_orders_send_window_new_update(struct xrdp_orders *self, int window_id,
         order_size += 8 * window_state->num_visibility_rects;
     }
 
+    if (order_size < 12)
+    {
+        /* no flags set */
+        return 0;
+    }
+
     if (xrdp_orders_check(self, order_size) != 0)
     {
         return 1;