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[PCI] Filter out devices with null vendor and device ID

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Some virtual machines errorneously expose null PCI device function
on PIIX4 chipset where an USB controller should normally reside.

Windows pci.sys driver does not enumerate these devices.

Affected virtual machines:
- Connectix Virtual PC 5.1.370
- Connectix Virtual PC 5.2.418
- Microsoft Virtual PC 2004 SP1 (5.3.582.27)
- Microsoft Virtual PC 2007 SP1 (6.0.156.0)

Non-affected virtual machines:
- Connectix Virtual PC 4.0
- Microsoft Hyper-V

Fixes CORE-17636.
This commit is contained in:
Stanislav Motylkov 2021-06-17 17:04:09 +03:00
parent c7954134d0
commit a4405f9610
No known key found for this signature in database
GPG key ID: AFE513258CBA9E92
1 changed files with 6 additions and 0 deletions
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6
drivers/bus/pci/fdo.c
View file

@ -151,6 +151,12 @@ FdoEnumerateDevices(
PciConfig.VendorID, PciConfig.VendorID,
PciConfig.DeviceID); PciConfig.DeviceID);
if (PciConfig.VendorID == 0 && PciConfig.DeviceID == 0)
{
DPRINT("Filter out devices with null vendor and device ID\n");
continue;
}
Status = FdoLocateChildDevice(&Device, DeviceExtension, SlotNumber, &PciConfig); Status = FdoLocateChildDevice(&Device, DeviceExtension, SlotNumber, &PciConfig);
if (!NT_SUCCESS(Status)) if (!NT_SUCCESS(Status))
{ {