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FWP_E_NULL_POINTER
FWP_E_NULL_POINTER — 0x8032001C
FWP_E_NULL_POINTER means a required WFP structure, object pointer, or nested member is null at a management API boundary.
Operational meaning
A Windows Filtering Platform management call is defined by the exact FWPM structure revision, layer, sublayer, action, conditions, provider context, and BFE transaction. Zero-initialization and backing-buffer lifetime matter because the engine validates the submitted object graph, not the caller’s high-level intent.
A zero-length array has a valid pointer/count shape problem of its own; this code identifies a required null pointer.
Build the incident record
- Exact Fwpm* API, structure revision, and all top-level/nested pointers
- Condition/action arrays, provider/sublayer references, and session handle
- SDK header version and 32/64-bit structure layout
- Caller validation immediately before entering BFE
Tests that separate the causes
- Start with the smallest documented filter/provider object.
- Set one optional pointer at a time while keeping required members present.
- Run under page heap and static analysis to catch lifetime/null propagation.
Repair without losing evidence
Apply the smallest change that addresses the first rejected condition: Initialize the correct structure version, supply all required objects, and preserve referenced buffers until the API returns.
Close the incident only when positive and null-member boundary tests return the expected distinct statuses without BFE object leakage.
Technical references
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