From 63a8d79553443e9048f31d53d4111f93d819ff75 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 3 Nov 2017 06:44:40 -0600
Subject: [PATCH] net/inet:  Fix a memory leak when closing a TCP socket.

---
 net/inet/inet_close.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/inet/inet_close.c b/net/inet/inet_close.c
index 66b798a305..bfb19d12de 100644
--- a/net/inet/inet_close.c
+++ b/net/inet/inet_close.c
@@ -348,7 +348,11 @@ static inline int tcp_close_disconnect(FAR struct socket *psock)
    * release it now.
    */
 
-  psock->s_sndcb = NULL;
+  if (psock->s_sndcb != NULL)
+    {
+      tcp_callback_free(conn, psock->s_sndcb);
+      psock->s_sndcb = NULL;
+    }
 #endif
 
   /* Check for the case where the host beat us and disconnected first */