From: Florin Coras <fcoras@cisco.com>
Date: Sun, 11 Oct 2020 18:20:56 +0000 (-0700)
Subject: tcp: fix connection reuse with no listener
X-Git-Tag: v21.06-rc0~377
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=355791c13f7cbd943b4864b097cf3c9598d2db20;p=vpp.git

tcp: fix connection reuse with no listener

Type: fix

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I674872f68406ac778779a68d3ad991f41765d4e2
---

diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index a86161c6d34..948383b4789 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -2575,6 +2575,12 @@ tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	  lc = tcp_lookup_listener (b, tc->c_fib_index, is_ip4);
 	  /* clean up the old session */
 	  tcp_connection_del (tc);
+	  /* listener was cleaned up */
+	  if (!lc)
+	    {
+	      error = TCP_ERROR_NO_LISTENER;
+	      goto done;
+	    }
 	}
 
       /* Make sure connection wasn't just created */