auth: make sure Lua axfrfilter() does not insert out of zone data

diff --git a/pdns/slavecommunicator.cc b/pdns/slavecommunicator.cc
index f89313d6daf7b484fd1efaccfc9114dfda48026e..ff492c377bfb913bbb0fd2a9c6a78af8ddc5d5d1 100644 (file)
--- a/pdns/slavecommunicator.cc
+++ b/pdns/slavecommunicator.cc
@@ -264,6 +264,10 @@ static vector<DNSResourceRecord> doAxfr(const ComboAddress& raddr, const DNSName
       }
 
       for(DNSResourceRecord& rr :  out) {
+        if(!rr.qname.isPartOf(domain)) {
+          L<<Logger::Error<<"Lua axfrfilter() filter tried to sneak in out-of-zone data '"<<i->qname<<"'|"<<i->qtype.getName()<<" during AXFR of zone '"<<domain<<"', ignoring"<<endl;
+          continue;
+        }
         if(!processRecordForZS(domain, firstNSEC3, rr, zs))
           continue;
         if(rr.qtype.getCode() == QType::SOA) {