From 9f4db3cddf9931ef97ef0ea8f9dac1b63199407c Mon Sep 17 00:00:00 2001
From: Florin Coras <fcoras@cisco.com>
Date: Tue, 10 Mar 2020 19:34:28 +0000
Subject: [PATCH] tcp: protect against forced cleanups

Type: fix

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I0c3b847044d522f55dfd8262afa7c161d5bd5dd3
---
 src/vnet/tcp/tcp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index 2ada8b8f7dd..7712ade4416 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -1467,6 +1467,8 @@ tcp_handle_cleanups (tcp_worker_ctx_t * wrk, clib_time_type_t now)
 	break;
       clib_fifo_sub2 (wrk->pending_cleanups, req);
       tc = tcp_connection_get (req->connection_index, thread_index);
+      if (PREDICT_FALSE (!tc))
+	continue;
       session_transport_delete_notify (&tc->connection);
       tcp_connection_cleanup (tc);
     }
-- 
2.16.6