From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Fri, 11 Oct 2019 12:52:08 +0000 (+0200)
Subject: dnsdist: Don't cache entries larger than 4096 bytes
X-Git-Tag: dnsdist-1.4.0-rc4~22^2~2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=01e23732fcec98e9a66fb213c0ae262d132f0da3;p=pdns

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 4b826767c..08d5ceeb2 100644
--- 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