From: Florin Coras <fcoras@cisco.com>
Date: Fri, 24 Jul 2020 16:49:46 +0000 (-0700)
Subject: tcp: fix synack elog crash
X-Git-Tag: v21.01-rc0~168
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=d2f5174dd045da53395939cd55a0f6e2821f6dcf;p=vpp.git

tcp: fix synack elog crash

The elog track, if enabled, must be initalized before synack is sent.

Type: fix

Signed-off-by: Ivan Shvedunov <ivan4th@gmail.com>
Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I0c585f466c9a5cbc13af971ae4951b93f9913c5f
---

diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index bdaa28ec3d0..b8c889ee1cc 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -2640,10 +2640,11 @@ tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 
       child->tx_fifo_size = transport_tx_fifo_size (&child->connection);
 
-      tcp_send_synack (child);
-
+      /* This initializes elog track, must be done before synack */
       TCP_EVT (TCP_EVT_SYN_RCVD, child, 1);
 
+      tcp_send_synack (child);
+
     done:
 
       if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))