From: Victor Julien <victor@inliniac.net>
Date: Mon, 11 Jul 2016 07:30:26 +0000 (+0200)
Subject: lua smtp: fix SMTPGetMimeField arg checking
X-Git-Tag: suricata-3.1.1~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F2171%2Fhead;p=thirdparty%2Fsuricata.git

lua smtp: fix SMTPGetMimeField arg checking

Properly check argument before passing it on: CID 1363385: (NULL_RETURNS)
---

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);