session udp: add len check for tx dgrams

[vpp.git] / src / vnet / session / session_node.c

diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index f652f2e..6d1b6bd 100644 (file)
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -1236,6 +1236,13 @@ session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
              ctx->max_len_to_snd = 0;
              return;
            }
+         /* We cannot be sure apps have not enqueued incomplete dgrams */
+         if (PREDICT_FALSE (ctx->max_dequeue <
+                            ctx->hdr.data_length + sizeof (ctx->hdr)))
+           {
+             ctx->max_len_to_snd = 0;
+             return;
+           }
          ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
          len = ctx->hdr.data_length - ctx->hdr.data_offset;