Fix segfault when mouse enters/clicks an area outside region bounds.

diff --git a/spectrwm.c b/spectrwm.c
index ff0258e..3d29c4e 100644 (file)
--- a/spectrwm.c
+++ b/spectrwm.c
@@ -7442,7 +7442,13 @@ buttonpress(xcb_button_press_event_t *e)
                        /* Focus on empty region */
                        /* If no windows on region if its empty. */
                        r = root_to_region(e->root, SWM_CK_POINTER);
-                       if (r && TAILQ_EMPTY(&r->ws->winlist)) {
+                       if (r == NULL) {
+                               DNPRINTF(SWM_D_EVENT, "buttonpress: "
+                                   "NULL region; ignoring.\n");
+                               goto out;
+                       }
+
+                       if (TAILQ_EMPTY(&r->ws->winlist)) {
                                old_r = root_to_region(e->root, SWM_CK_FOCUS);
                                if (old_r && old_r != r)
                                        unfocus_win(old_r->ws->focus);
@@ -7816,6 +7822,12 @@ enternotify(xcb_enter_notify_event_t *e)
                if (e->event == e->root) {
                        /* If no windows on pointer region, then focus root. */
                        r = root_to_region(e->root, SWM_CK_POINTER);
+                       if (r == NULL) {
+                               DNPRINTF(SWM_D_EVENT, "enterntoify: "
+                                   "NULL region; ignoring.\n");
+                               return;
+                       }
+
                        if (TAILQ_EMPTY(&r->ws->winlist)) {
                                old_r = root_to_region(e->root, SWM_CK_FOCUS);
                                if (old_r && old_r != r)