From bcb4b8080c496517dd9495c9061f50887cf440bf Mon Sep 17 00:00:00 2001
From: Otto Moerbeek <otto.moerbeek@open-xchange.com>
Date: Mon, 16 Oct 2023 11:06:20 +0200
Subject: [PATCH] Check if nrr pointer is valid before using

Co-authored-by: Remi Gacogne <github@coredump.fr>
---
 pdns/recursordist/syncres.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdns/recursordist/syncres.cc b/pdns/recursordist/syncres.cc
index f7c56a4e21..79eed8d6af 100644
--- a/pdns/recursordist/syncres.cc
+++ b/pdns/recursordist/syncres.cc
@@ -2289,7 +2289,7 @@ void SyncRes::getBestNSFromCache(const DNSName& qname, const QType qtype, vector
               LOG(", not in cache / did not look at cache" << endl);
             }
           }
-          else {
+          else if (nrr != nullptr) {
             *flawedNSSet = true;
             LOG(prefix << qname << ": NS in cache for '" << subdomain << "', but needs glue (" << nrr->getNS() << ") which we miss or is expired" << endl);
             missing.emplace_back(nrr->getNS());
-- 
2.47.2