From cd9164799947e54e686efaedda15f56b8a4a3bf1 Mon Sep 17 00:00:00 2001
From: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Date: Fri, 18 Jan 2019 20:51:58 +0100
Subject: [PATCH] Fix bug #55513: Uninitialized variable in struct netconn

using patch from Karol Domagalski

(cherry picked from commit 926e39935517acc16856ddd44598b3f7815efeba)
---
 src/api/api_msg.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/api/api_msg.c b/src/api/api_msg.c
index 39531024..3f08e038 100644
--- a/src/api/api_msg.c
+++ b/src/api/api_msg.c
@@ -716,6 +716,9 @@ netconn_alloc(enum netconn_type t, netconn_callback callback)
   conn->pending_err = ERR_OK;
   conn->type = t;
   conn->pcb.tcp = NULL;
+#if LWIP_NETCONN_FULLDUPLEX
+  conn->mbox_threads_waiting = 0;
+#endif
 
   /* If all sizes are the same, every compiler should optimize this switch to nothing */
   switch (NETCONNTYPE_GROUP(t)) {