![]() All I/O Verifier failures bug check with the code DRIVER_VERIFIER_IOMANAGER_VIOLATION (0xC9).Checks are made in IoCallDriver, IoCompleteRequest, and IoFreeIrp to catch driver error messages.All IRPs allocated through IoAllocateIrp are allocated from special pool, if available.It detects illegal or inconsistent use of I/O routines. When this option is active, Driver Verifier allocates the driver's IRPs from a special pool, and monitors the driver's I/O handling. When this option is active, Driver Verifier checks to see if the driver has freed all its memory allocations when it's unloaded. If the driver attempts to access paged memory at the wrong IRQL or while holding a spin lock, Driver Verifier detects this behavior. When this option is active, Driver Verifier places extreme memory pressure on the driver by invalidating pageable code. This special pool is monitored for memory overruns, memory underruns, and memory that's accessed after it's freed. When this option is active, Driver Verifier allocates most of the driver's memory requests from a special pool. ![]() Dereferencing an object that already has a reference count of 0.Trying to call KeWaitXxx at IRQL >= DISPATCH_LEVEL.Verifies that the driver doesn't have pending operations while unloading, such as pending DPCs or worker threads.Freed allocations aren't pointing to active timer objects.No random (uninitialized) values are specified to these application programming interfaces (APIs).Non-paged pool allocations/frees are made at the correct IRQL (DISPATCH_LEVEL or below).Paged pool allocations/frees are made at the correct IRQL (APC_LEVEL or below).Spin lock acquisitions/releases are made at the appropriate IRQL. ![]()
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