int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
{
	unsigned size;

	if (!field)
		return -1;

	size = field->report_size;

	hid_dump_input(field->report->device, field->usage + offset, value);

	if (offset >= field->report_count) {
		hid_err(field->report->device, "offset (%d) exceeds report_count (%d)\n",
				offset, field->report_count);
		return -1;
	}
	if (field->logical_minimum < 0) {
		if (value != snto32(s32ton(value, size), size)) {
			hid_err(field->report->device, "value %d is out of range\n", value);
			return -1;
		}
	}
	field->value[offset] = value;
	return 0;
}

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