From 84947d987ca13cf7d612d71d8b7e6a1241f4676f Mon Sep 17 00:00:00 2001
From: rudolfkoenig <rudolfkoenig@2b470e98-0d58-463d-a4d8-8e2adae1ed80>
Date: Thu, 8 Nov 2018 12:03:27 +0000
Subject: [PATCH] 00_MQTT2_CLIENT.pm: defend against deep recursion(?) (Froum
 #92946)

git-svn-id: https://svn.fhem.de/fhem/trunk@17707 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/00_MQTT2_CLIENT.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fhem/FHEM/00_MQTT2_CLIENT.pm b/fhem/FHEM/00_MQTT2_CLIENT.pm
index f204d7e5a..ea45156e1 100644
--- a/fhem/FHEM/00_MQTT2_CLIENT.pm
+++ b/fhem/FHEM/00_MQTT2_CLIENT.pm
@@ -251,9 +251,10 @@ MQTT2_CLIENT_Read($@)
   }
 
   my ($tlen, $off) = MQTT2_CLIENT_getRemainingLength($hash);
-  if($tlen < 0) {
+  if($tlen < 0 || $tlen+$off<=0) {
     Log3 $name, 1, "Bogus data from $name, closing connection";
     MQTT2_CLIENT_Disco($hash);
+    return;
   }
   return if(length($hash->{BUF}) < $tlen+$off);