BSOD 84 (LM_SERVER_INTERNAL_ERROR): causes and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The legacy LAN Manager server component detected an internal kernel failure.

Could be also:
Constant	Type	OS
ERROR_OUT_OF_STRUCTURES	Win32 error	Windows
EILSEQ	errno	Linux
EOVERFLOW	errno	Mac
ELIBBAD	errno	Solaris

LM_SERVER_INTERNAL_ERROR

Legacy server service kernel failure

LM_SERVER_INTERNAL_ERROR is bug check code 0x00000054. This historical bug check is associated with the server/redirector era of Windows networking. It is most useful when the stack shows server, SMB, redirector, or file-sharing kernel components rather than a modern user-mode service crash.

How to read it in a dump

Use the stack to separate server, redirector, file-system filter, and transport components.
The symbolic name is legacy; do not assume the old LAN Manager product is installed.
The crash is in kernel network/file-sharing code, not simply a failed file share connection.

What to check

Check SMB/server service drivers, antivirus/file-system filters, and network redirector state.
Correlate with heavy file sharing, DFS paths, oplock/lease activity, or filter-driver updates.
Use verifier carefully on file-system and network filters in a test reproduction.

References

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