From 6b602412dda70278ca8f4da7bc9ad27592dbf491 Mon Sep 17 00:00:00 2001
From: Otto <otto.moerbeek@open-xchange.com>
Date: Wed, 27 Oct 2021 09:38:10 +0200
Subject: [PATCH] wipe-cache-typed  should check if a qtype arg is present and
 valid

(cherry picked from commit a721f7b21a75cefaa189bf84b14979facde7d3ab)
---
 pdns/rec_channel_rec.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pdns/rec_channel_rec.cc b/pdns/rec_channel_rec.cc
index d5b82f8dfd..1376034f07 100644
--- a/pdns/rec_channel_rec.cc
+++ b/pdns/rec_channel_rec.cc
@@ -1790,7 +1790,13 @@ string RecursorControlParser::getAnswer(const string& question, RecursorControlP
     return doWipeCache(begin, end, 0xffff);
 
   if(cmd=="wipe-cache-typed") {
+    if (begin == end) {
+      return "Need a qtype\n";
+    }
     uint16_t qtype = QType::chartocode(begin->c_str());
+    if (qtype == 0) {
+      return "Unknown qtype " + *begin + "\n";
+    }
     ++begin;
     return doWipeCache(begin, end, qtype);
   }
-- 
2.47.2