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MemAfterReqCompletedWriteA rule (kmdf)

The MemAfterReqCompletedWriteA rule specifies that within the EvtIoWrite callback function, the framework memory object cannot be accessed after the I/O request is completed.

Within the driver's EvtIoWrite callback function, the framework memory object that was retrieved by calling the WdfRequestRetrieveInputMemory method cannot be accessed after calling WdfRequestComplete, WdfRequestCompleteWithInformation, or WdfRequestCompleteWithPriorityBoost on the I/O request.

This rule considers the following eight access methods:

WdfMemoryGetBuffer

WDF_MEMORY_DESCRIPTOR_INIT_HANDLE

WdfMemoryAssignBuffer

WdfMemoryCopyToBuffer

WdfMemoryCopyFromBuffer

WdfObjectReference

WdfObjectDereference

WdfObjectDelete

Driver modelKMDF

How to test

At compile time

Run Static Driver Verifier and specify the MemAfterReqCompletedWriteA rule.

Use the following steps to run an analysis of your code:
  1. Prepare your code (use role type declarations).
  2. Run Static Driver Verifier.
  3. View and analyze the results.

For more information, see Using Static Driver Verifier to Find Defects in Drivers.

Applies to

WDF_MEMORY_DESCRIPTOR_INIT_HANDLE
WdfMemoryAssignBuffer
WdfMemoryCopyFromBuffer
WdfMemoryCopyToBuffer
WdfMemoryGetBuffer
WdfObjectDelete
WdfObjectDereference
WdfObjectReference
WdfRequestComplete
WdfRequestCompleteWithInformation
WdfRequestCompleteWithPriorityBoost
WdfRequestRetrieveInputMemory

 

 

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