static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev)
{
	struct vfio_devices devs = { .cur_index = 0 };
	int i = 0, ret = -EINVAL;
	bool needs_reset = false, slot = false;
	struct vfio_pci_device *tmp;

	if (!pci_probe_reset_slot(vdev->pdev->slot))
		slot = true;
	else if (pci_probe_reset_bus(vdev->pdev->bus))
		return;

	if (vfio_pci_for_each_slot_or_bus(vdev->pdev, vfio_pci_count_devs,
					  &i, slot) || !i)
		return;

	devs.max_index = i;
	devs.devices = kcalloc(i, sizeof(struct vfio_device *), GFP_KERNEL);
	if (!devs.devices)
		return;

	if (vfio_pci_for_each_slot_or_bus(vdev->pdev,
					  vfio_pci_get_devs, &devs, slot))
		goto put_devs;

	for (i = 0; i < devs.cur_index; i++) {
		tmp = vfio_device_data(devs.devices[i]);
		if (tmp->needs_reset)
			needs_reset = true;
		if (tmp->refcnt)
			goto put_devs;
	}

	if (needs_reset)
		ret = slot ? pci_try_reset_slot(vdev->pdev->slot) :
			     pci_try_reset_bus(vdev->pdev->bus);

put_devs:
	for (i = 0; i < devs.cur_index; i++) {
		tmp = vfio_device_data(devs.devices[i]);
		if (!ret)
			tmp->needs_reset = false;

		if (!tmp->refcnt && !disable_idle_d3)
			pci_set_power_state(tmp->pdev, PCI_D3hot);

		vfio_device_put(devs.devices[i]);
	}

	kfree(devs.devices);
}

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.