MemAfterReqCompletedReadA rule (kmdf)

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

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

This rule considers the following memory access methods:

WdfMemoryGetBuffer WDF_MEMORY_DESCRIPTOR_INIT_HANDLE WdfMemoryAssignBuffer WdfMemoryCopyToBuffer WdfMemoryCopyFromBuffer WdfObjectReference WdfObjectDereference WdfObjectDelete

Driver model: KMDF

How to test

At compile time

Run Static Driver Verifier and specify the MemAfterReqCompletedReadA 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 WdfRequestRetrieveOutputMemory