Keyu Tao c1ab3f39d7 wayland/outputs: Fix potential crash when output has no monitor
bind_output() creates output interface resource, but does not
set implementation for it when wayland_output->monitor is NULL.
However, when the wayland library is running wl_closure_invoke(),
it expects the implementation to be non-NULL, and if not, it just
segfaults mutter by NULL pointer dereference.

This commit tries to address this issue by setting an implementation
when wayland_output->monitor is NULL. This could help prevent crash
when resuming from suspend or hotplugging displays.

Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2570
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2827>
2023-02-06 21:37:04 +08:00
..