From f2d0c8087c955862cd75e9188a7e0c4c56c13d7e Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Wed, 17 Jul 2019 10:24:55 +0200
Subject: [PATCH] dnsdist: Drop the response if the IDState has been reused
 under our feet

---
 pdns/dnsdist.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pdns/dnsdist.cc b/pdns/dnsdist.cc
index 244b3ba543..bb35f68047 100644
--- a/pdns/dnsdist.cc
+++ b/pdns/dnsdist.cc
@@ -586,6 +586,9 @@ try {
         } else {
           /* someone updated the state in the meantime, we can't touch the existing pointer */
           du = nullptr;
+          /* since the state has been updated, we can't safely access it so let's just drop
+             this response */
+          continue;
         }
 
         if(dh->tc && g_truncateTC) {
-- 
2.47.2