# present: Check for NULL to prevent crash

#

# https://gitlab.freedesktop.org/xorg/xserver/-/issues/1275

diff --git a/present/present_scmd.c b/present/present_scmd.c

--- present/present_scmd.c.orig

+++ present/present_scmd.c

@@ -168,6 +168,9 @@ present_scmd_get_crtc(present_screen_priv_ptr screen_priv, WindowPtr window)

     if (!screen_priv->info)

         return NULL;

+    if (!screen_priv->info->get_crtc)

+        return NULL;

+

     return (*screen_priv->info->get_crtc)(window);

 }

@@ -206,6 +209,9 @@ present_flush(WindowPtr window)

     if (!screen_priv->info)

         return;

+    if (!screen_priv->info->flush)

+        return;

+

     (*screen_priv->info->flush) (window);

 }