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-rw-r--r--src/vnet/tcp/tcp_input.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index d297ee7ed3e..10f50fefc09 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -1401,7 +1401,9 @@ process_ack:
if (!tcp_in_cong_recovery (tc))
return 0;
*error = TCP_ERROR_ACK_DUP;
- return vnet_buffer (b)->tcp.data_len ? 0 : -1;
+ if (vnet_buffer (b)->tcp.data_len || tcp_is_fin (th))
+ return 0;
+ return -1;
}
/*