data_len += b->total_length_not_including_first_buffer;
ASSERT (!b->total_length_not_including_first_buffer
- || (b->flags & VLIB_BUFFER_NEXT_PRESENT));
+ || (b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ || !(b->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID));
SCTP_ADV_DBG_OUTPUT ("b->current_length = %u, "
"b->current_data = %p "