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[NTOSKRNL] Implement IopCheckTopDeviceHint()

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Pierre Schweitzer 2018-10-05 10:45:21 +02:00
parent 670a7ac718
commit 779d87b483
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7
ntoskrnl/include/internal/io.h
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@ -1299,6 +1299,13 @@ IopGetFileInformation(
OUT PULONG ReturnedLength
);
BOOLEAN
NTAPI
IopVerifyDeviceObjectOnStack(
IN PDEVICE_OBJECT BaseDeviceObject,
IN PDEVICE_OBJECT TopDeviceObjectHint
);
//
// I/O Timer Routines
//

48
ntoskrnl/io/iomgr/file.c
View file

@ -266,6 +266,54 @@ IopDoNameTransmogrify(IN PIRP Irp,
ExFreePool(DataBuffer);
}
NTSTATUS
IopCheckTopDeviceHint(IN OUT PDEVICE_OBJECT * DeviceObject,
IN POPEN_PACKET OpenPacket,
BOOLEAN DirectOpen)
{
PDEVICE_OBJECT LocalDevice;
DEVICE_TYPE DeviceType;
LocalDevice = *DeviceObject;
/* Direct open is not allowed */
if (DirectOpen)
{
return STATUS_INVALID_PARAMETER;
}
/* Validate we have a file system device */
DeviceType = LocalDevice->DeviceType;
if (DeviceType != FILE_DEVICE_DISK_FILE_SYSTEM &&
DeviceType != FILE_DEVICE_CD_ROM_FILE_SYSTEM &&
DeviceType != FILE_DEVICE_TAPE_FILE_SYSTEM &&
DeviceType != FILE_DEVICE_NETWORK_FILE_SYSTEM &&
DeviceType != FILE_DEVICE_DFS_FILE_SYSTEM)
{
return STATUS_INVALID_PARAMETER;
}
/* Verify the hint and if it's OK, return it */
if (IopVerifyDeviceObjectOnStack(LocalDevice, OpenPacket->TopDeviceObjectHint))
{
*DeviceObject = OpenPacket->TopDeviceObjectHint;
return STATUS_SUCCESS;
}
/* Failure case here */
/* If we thought was had come through a mount point,
* actually update we didn't and return the error
*/
if (OpenPacket->TraversedMountPoint)
{
OpenPacket->TraversedMountPoint = FALSE;
return STATUS_MOUNT_POINT_NOT_RESOLVED;
}
/* Otherwise, just return the fact the hint is invalid */
return STATUS_INVALID_DEVICE_OBJECT_PARAMETER;
}
NTSTATUS
NTAPI
IopParseDevice(IN PVOID ParseObject,