BufAfterReqCompletedReadA rule (kmdf)

The BufAfterReqCompletedReadA rule specifies that within the EvtIoRead callback function, the I/O request buffer retrieved cannot be accessed after the I/O request is completed. There are 14 DDIs that serve as possible buffer access methods.

Within the driver's EvtIoRead callback function, the request buffer that was retrieved by calling WdfRequestRetrieveOutputBuffer or WdfRequestRetrieveUnsafeUserOutputBuffer cannot be accessed after calling WdfRequestComplete, WdfRequestCompleteWithInformation, or WdfRequestCompleteWithPriorityBoost on the I/O request.

Driver model KMDF

How to test

At compile time

Run Static Driver Verifier and specify the BufAfterReqCompletedReadA 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_BUFFER WdfMemoryAssignBuffer WdfMemoryCopyFromBuffer WdfMemoryCopyToBuffer WdfMemoryCreatePreallocated WdfRequestComplete WdfRequestCompleteWithInformation WdfRequestCompleteWithPriorityBoost WdfRequestRetrieveOutputBuffer WdfRequestRetrieveUnsafeUserOutputBuffer RtlCompareMemory RtlMoveMemory RtlZeroMemory ZwReadFile