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STATUS_FLT_BUFFER_TOO_SMALL
STATUS_FLT_BUFFER_TOO_SMALL identifies an output-buffer contract problem in a Filter Manager operation. It is not evidence that the kernel is out of memory: the caller supplied storage that cannot hold the requested entry, and the documented result for this status must be treated as unavailable.
Capture the exact Flt* routine, the supplied byte count, the object being queried, and any API-specific required-length output. Some calls support a size-discovery/retry pattern; others require a fixed structure or report a different status. Do not reuse partially filled data unless that specific routine documents it as valid.
Useful distinction
- Buffer too small concerns the caller's output storage.
- STATUS_INSUFFICIENT_RESOURCES concerns an allocation failure inside the component.
- STATUS_FLT_NAME_CACHE_MISS is a lookup result, not a sizing result.
Filter Manager API reference | NTSTATUS reference | Minifilter samples
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