What does BSOD 58 (SYSTEM_UNWIND_PREVIOUS_USER) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The kernel attempted an invalid unwind involving a previous user-mode context.

Could be also:
Constant	Type	OS
ERROR_BAD_NET_RESP	Win32 error	Windows
EDEADLOCK	errno	Linux
ESHUTDOWN	errno	Mac
EOWNERDEAD	errno	Solaris

SYSTEM_UNWIND_PREVIOUS_USER

Invalid unwind across user/kernel context

SYSTEM_UNWIND_PREVIOUS_USER is bug check code 0x0000003A. This bug check belongs to exception and stack-unwind handling. It indicates that control-flow or stack metadata did not match the expected transition between user and kernel contexts.

How to read it in a dump

Inspect trap frames, exception records, and stack frames around the transition.
Stack corruption, bad callback return, or code that damaged unwind state can be more important than the stop code itself.
A full dump helps distinguish user callback damage from kernel stack corruption.

What to check

Use WinDbg to examine the trap frame and call stack manually, not only !analyze output.
Check drivers using callbacks, system calls, or user-mode upcalls.
Look for memory corruption or overwritten return addresses.

References

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