From ee71d0bde97c2caa0d9c3c14a370d73f8e0ef627 Mon Sep 17 00:00:00 2001
From: project-repo <cagebreak_signing_key_10@project-repo.co>
Date: Sat, 24 Dec 2022 08:03:06 +0100
Subject: [PATCH] Add check to prevent buffer overflow

---
 keybinding.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/keybinding.c b/keybinding.c
index 6ebbc5a..9a3f908 100644
--- a/keybinding.c
+++ b/keybinding.c
@@ -807,6 +807,10 @@ print_modes(struct dyn_str *str, char **modes) {
 		++nmemb;
 		++tmp;
 	}
+	if(nmemb==0) {
+		wlr_log(WLR_ERROR,"This is a bug: Cagebreak has no valid modes. This should not occur, since default modes are defined on startup.");
+		return;
+	}
 	/* We are assuming here that we have at least one mode, which is given by
 	 * the initialization of cagebreak */
 	char *modes_str = calloc(len + 3 * (nmemb - 1) + 1, sizeof(char));