add null pointer checks for listener, dev and ti

2025-07-05 12:34:26 +02:00
1 changed files with 2 additions and 2 deletions
--- a/Xi/exevents.c
+++ b/Xi/exevents.c
@ -1294,13 +1294,13 @@ RetrieveTouchDeliveryData(DeviceIntPtr dev, TouchPointInfoPtr ti,
    *mask = NULL;
    *grab = NULL;

-    if (listener->type == LISTENER_GRAB ||
+    if (listener && listener->type == LISTENER_GRAB ||
        listener->type == LISTENER_POINTER_GRAB) {
        *grab = listener->grab;

        BUG_RETURN_VAL(!*grab, FALSE);
    }
-    else if (ti->emulate_pointer && dev->deviceGrab.grab &&
+    else if (ti && ti->emulate_pointer && dev && dev->deviceGrab.grab &&
             !dev->deviceGrab.fromPassiveGrab) {
        /* There may be an active pointer grab on the device */
        *grab = dev->deviceGrab.grab;