From 3dda01dfdeec2fd733a87590553bee3c9461f183 Mon Sep 17 00:00:00 2001
From: Charles-Henri Bruyand <charles-henri.bruyand@open-xchange.com>
Date: Thu, 2 Jun 2022 15:45:42 +0200
Subject: [PATCH] dnsdist: log an error when invalid custom metric name is
 given

---
 pdns/dnsdist-lua.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pdns/dnsdist-lua.cc b/pdns/dnsdist-lua.cc
index 3215e633f4..64c06ee9b1 100644
--- a/pdns/dnsdist-lua.cc
+++ b/pdns/dnsdist-lua.cc
@@ -2869,6 +2869,8 @@ static void setupLuaConfig(LuaContext& luaCtx, bool client, bool configCheck)
       return false;
     }
     if (!std::regex_match(name, std::regex("^[a-z0-9-]+$"))) {
+      g_outputBuffer = "Unable to declare metric '" + name + "': invalid name\n";
+      errlog("Unable to declare metric '%s': invalid name", name);
       return false;
     }
     if (type == "counter") {
-- 
2.47.2