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RPC_NT_SS_IN_NULL_CONTEXT
NULL RPC context handle passed as input
RPC_NT_SS_IN_NULL_CONTEXT is about an RPC context handle, a server-maintained state token that is returned to the client and passed back on later calls. It is not a Windows kernel handle or a binding handle.
For an [in] context-handle parameter, a NULL value cannot identify server-side state. This usually means the client skipped the open/create call that returns the context, reused a handle after close, or lost context state during recovery.
What to check
- Trace the open/create call that originally returns the context handle and the close call that sets it back to NULL.
- Check client error paths that continue with a context variable after a failed initialization call.
- Do not replace this with a binding-handle fix; the binding may be valid while the application context is NULL.
References
- Microsoft MIDL: context_handle attribute
- The Open Group: DCE RPC context handles
- Microsoft RPC: handles
- Microsoft Open Specifications: MS-RPCE overview
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