From 76aef84a7dede56bd0d55a0aa541275cd59391da Mon Sep 17 00:00:00 2001
From: pdns packagers <pdns@packages.debian.org>
Date: Mon, 12 Oct 2020 13:42:43 +0100
Subject: [PATCH] CVE-2019-10163-4.1.8-busyloop

Gbp-Pq: Name CVE-2019-10163-4.1.8-busyloop.patch
---
 pdns/communicator.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pdns/communicator.cc b/pdns/communicator.cc
index 7db5a3e..7fd59e4 100644
--- a/pdns/communicator.cc
+++ b/pdns/communicator.cc
@@ -136,7 +136,10 @@ void CommunicatorClass::mainloop(void)
           if (extraSlaveRefresh)
             slaveRefresh(&P);
         }
-        else { 
+        else {
+          // eat up extra posts to avoid busy looping if many posts were done
+          while (d_any_sem.tryWait() == 0) {
+          }
           break; // something happened
         }
         // this gets executed at least once every second
-- 
2.30.2