From c418758863c4fe0db71f032ddeb74367ea8e276a Mon Sep 17 00:00:00 2001
From: Raphael Coeffic <raphael.coeffic@frafos.com>
Date: Mon, 6 Jun 2022 07:39:57 +0200
Subject: [PATCH] getGVarString: boundary check

---
 radio/src/strhelpers.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/radio/src/strhelpers.cpp b/radio/src/strhelpers.cpp
index 068312638..b0ca2ee75 100644
--- a/radio/src/strhelpers.cpp
+++ b/radio/src/strhelpers.cpp
@@ -378,6 +378,11 @@ char *getGVarString(char *dest, int idx)
     idx = -idx - 1;
   }
 
+  if (idx >= MAX_GVARS) {
+    s[0] = '\0';
+    return s;
+  }
+  
   if (g_model.gvars[idx].name[0])
     strAppend(s, g_model.gvars[idx].name, LEN_GVAR_NAME);
   else