From c9333f247a7bf64e4e912bc7fa9b675caf9cdad4 Mon Sep 17 00:00:00 2001
From: Evgeniy Khramtsov <ekhramtsov@process-one.net>
Date: Tue, 19 Dec 2017 09:15:35 +0300
Subject: [PATCH] Don't crash on malformed IQ

Fixes #2175
---
 src/mod_muc_room.erl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mod_muc_room.erl b/src/mod_muc_room.erl
index e8d61dacb..fadfff6c5 100644
--- a/src/mod_muc_room.erl
+++ b/src/mod_muc_room.erl
@@ -331,7 +331,8 @@ normal_state({route, <<"">>,
     catch _:{xmpp_codec, Why} ->
 	    ErrTxt = xmpp:io_format_error(Why),
 	    Err = xmpp:err_bad_request(ErrTxt, Lang),
-	    ejabberd_router:route_error(IQ0, Err)
+	    ejabberd_router:route_error(IQ0, Err),
+	    {next_state, normal_state, StateData}
     end;
 normal_state({route, <<"">>, #iq{} = IQ}, StateData) ->
     Err = xmpp:err_bad_request(),