static bool check_raw_mode_ok(const struct bpf_func_proto *fn)
{
	int count = 0;

	if (fn->arg1_type == ARG_PTR_TO_UNINIT_MEM)
		count++;
	if (fn->arg2_type == ARG_PTR_TO_UNINIT_MEM)
		count++;
	if (fn->arg3_type == ARG_PTR_TO_UNINIT_MEM)
		count++;
	if (fn->arg4_type == ARG_PTR_TO_UNINIT_MEM)
		count++;
	if (fn->arg5_type == ARG_PTR_TO_UNINIT_MEM)
		count++;

	/* We only support one arg being in raw mode at the moment,
	 * which is sufficient for the helper functions we have
	 * right now.
	 */
	return count <= 1;
}

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