static int logi_dj_raw_event(struct hid_device *hdev,
			     struct hid_report *report, u8 *data,
			     int size)
{
	struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev);
	struct dj_report *dj_report = (struct dj_report *) data;
	unsigned long flags;
	bool report_processed = false;

	dbg_hid("%s, size:%d\n", __func__, size);

	/* Here we receive all data coming from iface 2, there are 4 cases:
	 *
	 * 1) Data should continue its normal processing i.e. data does not
	 * come from the DJ collection, in which case we do nothing and
	 * return 0, so hid-core can continue normal processing (will forward
	 * to associated hidraw device)
	 *
	 * 2) Data is from DJ collection, and is intended for this driver i. e.
	 * data contains arrival, departure, etc notifications, in which case
	 * we queue them for delayed processing by the work queue. We return 1
	 * to hid-core as no further processing is required from it.
	 *
	 * 3) Data is from DJ collection, and informs a connection change,
	 * if the change means rf link loss, then we must send a null report
	 * to the upper layer to discard potentially pressed keys that may be
	 * repeated forever by the input layer. Return 1 to hid-core as no
	 * further processing is required.
	 *
	 * 4) Data is from DJ collection and is an actual input event from
	 * a paired DJ device in which case we forward it to the correct hid
 	 * device (via hid_input_report() ) and return 1 so hid-core does not do
 	 * anything else with it.
 	 */
	if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) ||
	    (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) {
		dev_err(&hdev->dev, "%s: invalid device index:%d\n",
				__func__, dj_report->device_index);
		return false;
	}
 
 	spin_lock_irqsave(&djrcv_dev->lock, flags);
 	if (dj_report->report_id == REPORT_ID_DJ_SHORT) {
		switch (dj_report->report_type) {
		case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
		case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
			logi_dj_recv_queue_notification(djrcv_dev, dj_report);
			break;
		case REPORT_TYPE_NOTIF_CONNECTION_STATUS:
			if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] ==
			    STATUS_LINKLOSS) {
				logi_dj_recv_forward_null_report(djrcv_dev, dj_report);
			}
			break;
		default:
			logi_dj_recv_forward_report(djrcv_dev, dj_report);
		}
		report_processed = true;
	}
	spin_unlock_irqrestore(&djrcv_dev->lock, flags);

	return report_processed;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.