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xwayland: Make sure we have a focus window 

During the InitInput() phase, the wayland events get dequeued so we
can possibly end up calling dispatch_pointer_motion_event().

If this occurs before xwl_seat->focus_window is set, it leads to a NULL
pointer derefence and a segfault.

Check for xwl_seat->focus_window in both pointer_handle_frame() and
relative_pointer_handle_relative_motion() prior to calling
dispatch_pointer_motion_event()  like it's done in
pointer_handle_motion().

Bugzilla: https://bugzilla.redhat.com/1410804
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Olivier Fourdan 2017-02-28 14:27:52 +01:00 committed by Peter Hutterer
parent c9cbdada75
commit 8c9909a992
1 changed files with 6 additions and 0 deletions
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6
hw/xwayland/xwayland-input.c
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@ -510,6 +510,9 @@ pointer_handle_frame(void *data, struct wl_pointer *wl_pointer)
{
struct xwl_seat *xwl_seat = data;
if (!xwl_seat->focus_window)
return;
dispatch_pointer_motion_event(xwl_seat);
}
@ -560,6 +563,9 @@ relative_pointer_handle_relative_motion(void *data,
xwl_seat->pending_pointer_event.dx_unaccel = wl_fixed_to_double(dx_unaccelf);
xwl_seat->pending_pointer_event.dy_unaccel = wl_fixed_to_double(dy_unaccelf);
if (!xwl_seat->focus_window)
return;
if (wl_proxy_get_version((struct wl_proxy *) xwl_seat->wl_pointer) < 5)
dispatch_pointer_motion_event(xwl_seat);
}