gdk: Fix wl_output accounting on tablet devices

The code managing this accounting mixed seat and tablet output lists,
can't bode well. Fixes invalid reads on list elements, as there are
dangling pointers.

Closes: https://gitlab.gnome.org/GNOME/gtk/issues/2157

diff --git a/gdk/wayland/gdkdevice-wayland.c b/gdk/wayland/gdkdevice-wayland.c
index d90d13332120985ee4c7eebbf65f3553ab6a841c..7a7031d882bea9acc33546d796e7977b6f571e0c 100644 (file)
--- a/gdk/wayland/gdkdevice-wayland.c
+++ b/gdk/wayland/gdkdevice-wayland.c
@@ -4490,7 +4490,7 @@ pointer_surface_enter (void              *data,
   if (tablet)
     {
       tablet->pointer_info.pointer_surface_outputs =
-        g_slist_append (seat->pointer_info.pointer_surface_outputs, output);
+        g_slist_append (tablet->pointer_info.pointer_surface_outputs, output);
     }
   else
     {
@@ -4519,7 +4519,7 @@ pointer_surface_leave (void              *data,
   if (tablet)
     {
       tablet->pointer_info.pointer_surface_outputs =
-        g_slist_remove (seat->pointer_info.pointer_surface_outputs, output);
+        g_slist_remove (tablet->pointer_info.pointer_surface_outputs, output);
     }
   else
     {