DF - Fuzz random IOCTL test (Reliability)

During random tests, the Fuzz test issues a series of calls to the DeviceIoControl function with function codes, device types, data transfer methods, and access requirements that are selected at random from a specified range of values. The calls include input and output buffers with valid and invalid buffer pointers and lengths, and randomly generated content.

The Fuzz test performs the random tests on all devices opened during the Basic Open Test and additional open tests. You can customize this test by using the following parameters:

  • Use MinFunctionCode and MaxFunctionCode to specify the range of IOCTL or FSCTL function codes used in the calls
  • Use MinDeviceType and MaxDeviceType to specify the range of device types used in the calls
  • Use SeedNumber to specify a seed number for the random number generating routine.

The function that the Fuzz test uses to generate random numbers for the test uses a seed number, a starting number for the random-number-generating algorithm. To reproduce the test conditions, use the seed number parameter to specify the seed number that was used in the original test trial.

A Tailored Random Test is included as part of the random test. The tailored random test uses the results of the random test to examine the drivers response to FSCTL requests in more detail. The tailored random test probes areas that the random test missed and those on which the driver did not respond as expected based on the status returned by the random test calls.

Test binary: Devfund_FuzzTest.dll Test methods: DoRandomFSCTLTest

Test details

Specifications
  • Device.DevFund.Reliability.BasicReliabilityAndPerformance
  • Device.DevFund.Reliability.BasicSecurity
  • Device.DevFund.DriverFramework.KMDF.Reliability
  • Device.DevFund.DriverFramework.UMDF.Reliability
Platforms
  • Windows 10, client editions (x86)
  • Windows 10, client editions (x64)
  • Windows Server 2016 (x64)
  • Windows 10, client editions (ARM64)
  • Windows 10, mobile edition (ARM)
  • Windows 10, mobile edition (ARM64)
Supported Releases
  • Windows 10
  • Windows 10, version 1511
  • Windows 10, version 1607
  • Windows 10, version 1703
  • Windows 10, version 1709
  • Windows 10, version 1803
  • Windows 10, version 1809
  • Next update to Windows 10
Expected run time (in minutes) 15
Category Scenario
Timeout (in minutes) 180
Requires reboot false
Requires special configuration true
Type automatic

 

Additional documentation

Tests in this feature area might have additional documentation, including prerequisites, setup, and troubleshooting information, that can be found in the following topic(s):

Running the test

Before you run the test, complete the test setup as described in the test requirements: Device.Fundamentals Reliability Testing Prerequisites.

Troubleshooting

For generic troubleshooting of HLK test failures, see Troubleshooting Windows HLK Test Failures.

For troubleshooting information specific to the Device Fundamentals tests in the HLK and WDK, see Device.DevFund additional documentation.

More information

Parameters

Parameter name Parameter description
DQ A WDTF SDEL query that is used to identify the target device(s) - http://go.microsoft.com/fwlink/?LinkId=232678
Wpa2PskAesSsid Required ONLY if DUT or one of its child devices is a WiFi adapter. Please provide SSID of a WPA2 AES WiFi network that the test can use to test the WiFi adapter. The default is 'kitstestssid'.
Wpa2PskPassword Required ONLY if DUT or one of its child devices is a WiFi adapter. Please provide password of the WPA2 AES WiFi network specified using the Wpa2PskAesSsid parameter. The default is 'password'.
ChangeBufferProtectionFlags True or False. Changes the memory protection flags of buffers passed to the tested device. The memory protection flags alternates between no access, read-only, and read-only with page guard.
Impersonate True or False. Runs the test as a non administrative user.
FillZeroPageWithNull True or False. Maps the zero page and fills it with NULL values. This test identifies drivers that do not verify a pointer reference before dereferencing a pointer.
DoPoolCheck True or False. Monitors the driver's use of the paged and nonpaged system memory pools by using pool tags and lookaside lists. This option also monitors changes in the number of exceptions handled which might indicate errors in exception handling.
DoSync True or False. Also opens device handles in SYNC mode (FILE_SYNCHRONOUS_IO_ALERT). Random read and write operations are skipped.
TestCycles Number of test cycles.
DriverVerifierAdditionalDrivers Additional drivers that should have Driver Verifier enabled
DriverVerifierExcludedFlags Placeholder for Driver Verifier flags that may be manually excluded for the test run
WDKDeviceID Device id of device under test
QueryHardwareID Hardware id of device under test
WDTFREMOTESYSTEM Required ONLY if DUT or one of its child devices is a wired NIC that doesn't have an IPv6 gateway address. If determined to be required, please provide an IPv6 address that the test NIC can ping to test network I/O. Eg: fe80::78b6:810:9c12:46cd
DriverVerifierCustomizeConfiguration Specifies that this test may want to automatically update Driver Verifier settings
MinDeviceType Specifies the minimum value of the DeviceType field in the IOCTLs. The minimum possible value is 0. Use -1 for automatic type detection (preferred).
MaxDeviceType Specifies the maximum value of the DeviceType field in the IOCTLs. The maximum possible value is 65535. Use -1 for automatic type detection (preferred).
MinFunctionCode Specifies the minimum value of the FunctionCode field in the IOCTLs. The minimum possible value is 0.
MaxFunctionCode Specifies the maximum value of the FunctionCode field in the IOCTLs. The maximum possible value is 4095.
MinInBuffer Specifies the minimum size, in bytes, of the input buffers that the test passes to the driver in IOCTLs.
MaxInBuffer Specifies the maximum size, in bytes, of the input buffers that the test passes to the driver in IOCTLs.
MinOutBuffer Specifies the minimum size, in bytes, of the output buffers that the test passes to the driver in IOCTLs.
MaxOutBuffer Specifies the maximum size, in bytes, of the output buffers that the test passes to the driver in IOCTLs.
MaxRandomCalls Specifies the maximum number of calls that the test issues.
MaxTailoredCalls Specifies the maximum number of calls that the test issues during the tailored random test.
SeedNumber Specified the seed number used in generating random IOCTLs.