What does NTSTATUS 0xC01C0016 (STATUS_FLT_CONTEXT_ALLOCATION_NOT_FOUND) mean?

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Description:

the minifilter requested a context type that was not registered for allocation

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STATUS_FLT_INSTANCE_NOT_FOUND	STATUS_FLT_INVALID_CONTEXT_REGISTRATION

STATUS_FLT_CONTEXT_ALLOCATION_NOT_FOUND

Filter Manager allocates only the context types declared by the minifilter's context-registration table. This status means that no registered allocation definition matched the requested context type or request.

Check the FLT_CONTEXT_REGISTRATION entries passed to FltRegisterFilter, including the context type, flags, size, and cleanup callback. Do not replace a missing Filter Manager context with an arbitrary side allocation when the state must follow an object or transaction lifecycle; that bypasses the framework's attachment and cleanup model.

What to inspect

The requested context type at the failing FltAllocateContext call.
The registration table compiled into the loaded driver, including its terminator.
Whether the context belongs on the filter, instance, volume, stream, handle, file, or transaction object.

FltAllocateContext | Managing minifilter contexts | NTSTATUS reference

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