BSOD 418 (WIN32K_CALLOUT_WATCHDOG_BUGCHECK): causes and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: WIN32K_CALLOUT_WATCHDOG_BUGCHECK

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Constant	Type	OS
HTTP_STATUS_TEAPOT	HTTP Code	Any

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WIN32K_CALLOUT_WATCHDOG_LIVEDUMP	CALL_HAS_NOT_RETURNED_WATCHDOG_TIMEOUT_LIVEDUMP

WIN32K_CALLOUT_WATCHDOG_BUGCHECK

WIN32K_CALLOUT_WATCHDOG_BUGCHECK is bug check 0x1A2. Microsoft states that a callout to Win32k did not return promptly. Parameter 1 identifies the thread blocking prompt return from the Win32k callout; parameters 2, 3, and 4 are reserved.

This is the bug-check counterpart, not the 0x1A1 live-dump code

WIN32K_CALLOUT_WATCHDOG_LIVEDUMP (0x1A1) is explicitly reserved for live dumps and can never be used for a real bug check. The 0x1A2 value is the stop-code counterpart. Keep the distinction because a live dump allows the operating system to continue, whereas a bug check represents a system stop.

Thread-centered analysis

Start with the thread address in parameter 1 and inspect that thread's stack and wait state.
Determine what the thread is waiting on or executing and which component is preventing prompt return from the callout.
Do not decode reserved arguments as timeout durations or object addresses.

References

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