From c60fe0c6f61d5ed1dfd047387dc084ccea8e5474 Mon Sep 17 00:00:00 2001
From: Alexander Alashkin <alexander.alashkin@cesanta.com>
Date: Mon, 3 Apr 2017 10:14:16 +0100
Subject: [PATCH] Fix crash in multipart handling

Close cesanta/dev#6974

PUBLISHED_FROM=4d4e4a46eceba10aec8dacb7f8f58bd078c92307
---
 mongoose.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mongoose.c b/mongoose.c
index d0dcf8b8..b45823bf 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -5879,6 +5879,12 @@ static int mg_http_multipart_wait_for_boundary(struct mg_connection *c) {
   struct mbuf *io = &c->recv_mbuf;
   struct mg_http_proto_data *pd = mg_http_get_proto_data(c);
 
+  if (pd->mp_stream.boundary == NULL) {
+    pd->mp_stream.state = MPS_FINALIZE;
+    DBG(("Invalid request: boundary not initilaized"));
+    return 0;
+  }
+
   if ((int) io->len < pd->mp_stream.boundary_len + 2) {
     return 0;
   }