From 3ca3bd197f421e2d5a73f0fd0827dc9a8cb991b5 Mon Sep 17 00:00:00 2001
From: matt335672 <30179339+matt335672@users.noreply.github.com>
Date: Thu, 15 Feb 2024 11:23:46 +0000
Subject: [PATCH] Prevent EGFX drawing while channel is down

Clear egfx_up as soon as the channel starts to close so that
xrdp_mm_draw_dirty() doesn't send data to a closed channel.
---
 xrdp/xrdp_mm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xrdp/xrdp_mm.c b/xrdp/xrdp_mm.c
index 882dfbd5..650dfb48 100644
--- a/xrdp/xrdp_mm.c
+++ b/xrdp/xrdp_mm.c
@@ -1699,6 +1699,7 @@ process_display_control_monitor_layout_data(struct xrdp_wm *wm)
             if (error == 0 && module != 0)
             {
                 xrdp_egfx_shutdown_close_connection(wm->mm->egfx);
+                mm->egfx_up = 0;
             }
             advance_resize_state_machine(mm, WMRZ_EGFX_CONN_CLOSING);
             break;
@@ -1727,7 +1728,6 @@ process_display_control_monitor_layout_data(struct xrdp_wm *wm)
             {
                 xrdp_egfx_shutdown_delete(wm->mm->egfx);
                 mm->egfx = NULL;
-                mm->egfx_up = 0;
             }
             advance_resize_state_machine(mm, WMRZ_SERVER_MONITOR_RESIZE);
             break;