From 0a76eab7c7e3e7d09422835dc086923bc4c6ac3f Mon Sep 17 00:00:00 2001
From: Pieter Lexis <pieter.lexis@powerdns.com>
Date: Thu, 25 May 2017 15:59:49 +0200
Subject: [PATCH] calidns: ensure cache hitrate is sane

---
 pdns/calidns.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/pdns/calidns.cc b/pdns/calidns.cc
index 77f613f3cb..9241a2e997 100644
--- a/pdns/calidns.cc
+++ b/pdns/calidns.cc
@@ -232,7 +232,12 @@ try
 
   bool wantRecursion = g_vm.count("want-recursion");
 
-  double hitrate = g_vm["hitrate"].as<double>() / 100;
+  double hitrate = g_vm["hitrate"].as<double>();
+  if (hitrate > 100 || hitrate < 0) {
+    cerr<<"hitrate must be between 0 and 100, not "<<hitrate<<endl;
+    return EXIT_FAILURE;
+  }
+  hitrate /= 100;
   uint32_t qpsstart = g_vm["initital-qps"].as<uint32_t>();
 
   struct sched_param param;
-- 
2.47.2