vcl: handle rx notifications on reused sessions

Type: fix

Ignore events on sessions that have been reused but not fully
initialized.

Change-Id: Ided020eb5245d665d0a2e4a9e1f8a6dddebae009
Signed-off-by: Florin Coras <fcoras@cisco.com>
(cherry picked from commit bd52e46fe8193182cce150292e9df1c517795011)

diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 72ec4f4..70df750 100644 (file)
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -1971,6 +1971,8 @@ vppcom_session_write_msg (uint32_t session_handle, void *buf, size_t n)
 }
 
 #define vcl_fifo_rx_evt_valid_or_break(_s)                             \
+if (PREDICT_FALSE (!_s->rx_fifo))                                      \
+  break;                                                               \
 if (PREDICT_FALSE (svm_fifo_is_empty (_s->rx_fifo)))                   \
   {                                                                    \
     if (!vcl_session_is_ct (_s))                                       \