From d7e6f3a7a8dcc879f7478f262e522764c4d6dfa8 Mon Sep 17 00:00:00 2001
From: tokyo4j <hrak1529@gmail.com>
Date: Thu, 14 Nov 2024 00:25:49 +0900
Subject: [PATCH] menu: invalidate nested duplicated menus

Prior to this commit, nesting the same menus caused stack overflow at
`close_all_submenus()` when trying to open it.
---
 src/menu/menu.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/menu/menu.c b/src/menu/menu.c
index 045d310a..966601eb 100644
--- a/src/menu/menu.c
+++ b/src/menu/menu.c
@@ -663,6 +663,17 @@ handle_menu_element(xmlNode *n, struct server *server)
 		}
 
 		struct menu *menu = menu_get_by_id(server, id);
+
+		struct menu *iter = current_menu;
+		while (iter) {
+			if (iter == menu) {
+				wlr_log(WLR_ERROR, "menus with the same id '%s' "
+					"cannot be nested", id);
+				goto error;
+			}
+			iter = iter->parent;
+		}
+
 		if (menu) {
 			current_item = item_create(current_menu, menu->label, true);
 			if (current_item) {