static void delayedwork_callback(struct work_struct *work)
{
	struct dj_receiver_dev *djrcv_dev =
		container_of(work, struct dj_receiver_dev, work);

	struct dj_report dj_report;
	unsigned long flags;
	int count;
	int retval;

	dbg_hid("%s\n", __func__);

	spin_lock_irqsave(&djrcv_dev->lock, flags);

	count = kfifo_out(&djrcv_dev->notif_fifo, &dj_report,
				sizeof(struct dj_report));

	if (count != sizeof(struct dj_report)) {
		dev_err(&djrcv_dev->hdev->dev, "%s: workitem triggered without "
			"notifications available\n", __func__);
		spin_unlock_irqrestore(&djrcv_dev->lock, flags);
		return;
	}

	if (!kfifo_is_empty(&djrcv_dev->notif_fifo)) {
		if (schedule_work(&djrcv_dev->work) == 0) {
			dbg_hid("%s: did not schedule the work item, was "
				"already queued\n", __func__);
		}
	}

	spin_unlock_irqrestore(&djrcv_dev->lock, flags);

	switch (dj_report.report_type) {
	case REPORT_TYPE_NOTIF_DEVICE_PAIRED:
		logi_dj_recv_add_djhid_device(djrcv_dev, &dj_report);
		break;
	case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
		logi_dj_recv_destroy_djhid_device(djrcv_dev, &dj_report);
		break;
	default:
	/* A normal report (i. e. not belonging to a pair/unpair notification)
	 * arriving here, means that the report arrived but we did not have a
	 * paired dj_device associated to the report's device_index, this
	 * means that the original "device paired" notification corresponding
	 * to this dj_device never arrived to this driver. The reason is that
	 * hid-core discards all packets coming from a device while probe() is
	 * executing. */
	if (!djrcv_dev->paired_dj_devices[dj_report.device_index]) {
		/* ok, we don't know the device, just re-ask the
		 * receiver for the list of connected devices. */
		retval = logi_dj_recv_query_paired_devices(djrcv_dev);
		if (!retval) {
			/* everything went fine, so just leave */
			break;
		}
		dev_err(&djrcv_dev->hdev->dev,
			"%s:logi_dj_recv_query_paired_devices "
			"error:%d\n", __func__, retval);
		}
		dbg_hid("%s: unexpected report type\n", __func__);
	}
}

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.