From 9d01ef58fcb4519608a4533496a8478a1be15f7b Mon Sep 17 00:00:00 2001
From: Victor Julien <victor@inliniac.net>
Date: Mon, 11 Jul 2016 09:30:26 +0200
Subject: [PATCH] lua smtp: fix SMTPGetMimeField arg checking

Properly check argument before passing it on: CID 1363385: (NULL_RETURNS)
---
 src/util-lua-smtp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/util-lua-smtp.c b/src/util-lua-smtp.c
index f18bea1b3c..a64c709832 100644
--- a/src/util-lua-smtp.c
+++ b/src/util-lua-smtp.c
@@ -112,6 +112,9 @@ static int SMTPGetMimeField(lua_State *luastate)
         return LuaCallbackError(luastate, "Error: no flow found");
     }
     const char *name = LuaGetStringArgument(luastate, 1);
+    if (name == NULL)
+        return LuaCallbackError(luastate, "1st argument missing, empty or wrong type");
+
     /* lock check */
     if(lock_hint == LUA_FLOW_NOT_LOCKED_BY_PARENT) {
         FLOWLOCK_RDLOCK(flow);
-- 
2.47.2