From: pdns packagers <pdns@packages.debian.org>
Date: Fri, 21 Jun 2019 19:07:07 +0000 (+0100)
Subject: CVE-2019-10163-4.1.8-busyloop
X-Git-Tag: archive/raspbian/4.1.6-3+rpi1^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=ca7131cb6d2bd594d8575001b80e73098948589b;p=pdns.git

CVE-2019-10163-4.1.8-busyloop


Gbp-Pq: Name CVE-2019-10163-4.1.8-busyloop.patch
---

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