From: Peter van Dijk <peter.van.dijk@powerdns.com>
Date: Wed, 11 Nov 2020 10:20:41 +0000 (+0100)
Subject: rec-4.3: do not send overly long NOD lookups
X-Git-Tag: rec-4.3.6~2^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F9706%2Fhead;p=thirdparty%2Fpdns.git

rec-4.3: do not send overly long NOD lookups
---

diff --git a/pdns/pdns_recursor.cc b/pdns/pdns_recursor.cc
index 82cb1d6cad..719185d443 100644
--- a/pdns/pdns_recursor.cc
+++ b/pdns/pdns_recursor.cc
@@ -1077,7 +1077,13 @@ static void sendNODLookup(const DNSName& dname)
     // Send a DNS A query to <domain>.g_nodLookupDomain
     static const QType qt(QType::A);
     static const uint16_t qc(QClass::IN);
-    DNSName qname = dname + g_nodLookupDomain;
+    DNSName qname;
+    try {
+      qname = dname + g_nodLookupDomain;
+    }
+    catch(const std::range_error &e) {
+      return;
+    }
     vector<DNSRecord> dummy;
     directResolve(qname, qt, qc, dummy);
   }