rootston: roots_keyboard null check

rootston/keyboard.c

@@ -249,6 +249,10 @@ struct roots_keyboard *roots_keyboard_create(struct wlr_input_device *device,
 	keyboard->input = input;
 
 	struct keyboard_config *config = calloc(1, sizeof(struct keyboard_config));
+	if (config == NULL) {
+		free(keyboard);
+		return NULL;
+	}
 	keyboard_config_merge(config, config_get_keyboard(input->config, device));
 	keyboard_config_merge(config, config_get_keyboard(input->config, NULL));
 

rootston/seat.c

@@ -306,6 +306,11 @@ void roots_seat_destroy(struct roots_seat *seat) {
 static void seat_add_keyboard(struct roots_seat *seat, struct wlr_input_device *device) {
 	assert(device->type == WLR_INPUT_DEVICE_KEYBOARD);
 	struct roots_keyboard *keyboard = roots_keyboard_create(device, seat->input);
+	if (keyboard == NULL) {
+		wlr_log(L_ERROR, "could not allocate keyboard for seat");
+		return;
+	}
+
 	keyboard->seat = seat;
 
 	wl_list_insert(&seat->keyboards, &keyboard->link);