From e8a3d42e2d5fdec20bed19cab244a5a557c5a0f5 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Sat, 9 Sep 2017 21:46:41 +0200
Subject: [PATCH] Fix bug #51937 by checking TF_CLOSED at the end of all pcb
 callbacks in tcp_input()

(cherry picked from commit 86abfbe0877c891f27b52e249cf8d1d3b4d08705)
---
 src/core/tcp_in.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/core/tcp_in.c b/src/core/tcp_in.c
index aa583323..5e839ff6 100644
--- a/src/core/tcp_in.c
+++ b/src/core/tcp_in.c
@@ -480,6 +480,9 @@ tcp_input(struct pbuf *p, struct netif *inp)
         }
 
         tcp_input_pcb = NULL;
+        if (tcp_input_delayed_close(pcb)) {
+          goto aborted;
+        }
         /* Try to send something out. */
         tcp_output(pcb);
 #if TCP_INPUT_DEBUG