* we can be pretty sure that we have a valid parse unit */
if (!unpack_parse_unit(&pu1, pc, pc->index - 13) ||
!unpack_parse_unit(&pu, pc, pc->index - 13 - pu1.prev_pu_offset) ||
- pu.next_pu_offset != pu1.prev_pu_offset) {
+ pu.next_pu_offset != pu1.prev_pu_offset ||
+ pc->index < pc->dirac_unit_size + 13LL + pu1.prev_pu_offset
+ ) {
pc->index -= 9;
*buf_size = next-9;
pc->header_bytes_needed = 9;