static OPJ_BOOL opj_pi_next_lrcp(opj_pi_iterator_t * pi) {
	opj_pi_comp_t *comp = NULL;
	opj_pi_resolution_t *res = NULL;
	OPJ_UINT32 index = 0;
	
	if (!pi->first) {
		comp = &pi->comps[pi->compno];
		res = &comp->resolutions[pi->resno];
		goto LABEL_SKIP;
	} else {
		pi->first = 0;
	}

	for (pi->layno = pi->poc.layno0; pi->layno < pi->poc.layno1; pi->layno++) {
		for (pi->resno = pi->poc.resno0; pi->resno < pi->poc.resno1;
		pi->resno++) {
			for (pi->compno = pi->poc.compno0; pi->compno < pi->poc.compno1; pi->compno++) {
				comp = &pi->comps[pi->compno];
				if (pi->resno >= comp->numresolutions) {
					continue;
				}
				res = &comp->resolutions[pi->resno];
				if (!pi->tp_on){
					pi->poc.precno1 = res->pw * res->ph;
				}
				for (pi->precno = pi->poc.precno0; pi->precno < pi->poc.precno1; pi->precno++) {
					index = pi->layno * pi->step_l + pi->resno * pi->step_r + pi->compno * pi->step_c + pi->precno * pi->step_p;
					if (!pi->include[index]) {
						pi->include[index] = 1;
						return OPJ_TRUE;
					}
LABEL_SKIP:;
				}
			}
		}
	}
	
	return OPJ_FALSE;
}

The product reads data past the end, or before the beginning, of the intended buffer.