dnsdist: Don't cache entries larger than 4096 bytes

We won't be able to use them anyway.

diff --git a/pdns/dnsdist.cc b/pdns/dnsdist.cc
index 4b826767c3a2442fc0b2a2ccb07a322db926919e..08d5ceeb283e78c95199c4a48fbe3941a3278e4d 100644 (file)
--- a/pdns/dnsdist.cc
+++ b/pdns/dnsdist.cc
@@ -439,7 +439,7 @@ bool processResponse(char** response, uint16_t* responseLen, size_t* responseSiz
     return false;
   }
 
-  if (dr.packetCache && !dr.skipCache) {
+  if (dr.packetCache && !dr.skipCache && *responseLen <= s_maxPacketCacheEntrySize) {
     if (!dr.useZeroScope) {
       /* if the query was not suitable for zero-scope, for
          example because it had an existing ECS entry so the hash is