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KERNEL_EXPAND_STACK_ACTIVE
Expanded kernel stack still active for KERNEL_EXPAND_STACK_ACTIVE
KERNEL_EXPAND_STACK_ACTIVE is bug check code 0x00000107. Some kernel paths temporarily expand a thread stack for complex callouts. This bug check indicates the thread tried to terminate or make a Win32 callout while that expanded stack state was still active, suggesting broken stack/lifetime ordering.
How to read it in a dump for KERNEL_EXPAND_STACK_ACTIVE
- Identify the thread, expanded-stack state, and callout path.
- Graphics, file-system, registry, or callback-heavy drivers can create deep stack paths.
- Stack usage and cleanup order matter more than raw memory usage.
What to check for KERNEL_EXPAND_STACK_ACTIVE
- Inspect stack expansion frames and the driver just above the kernel transition.
- Look for callbacks that terminate a thread or call out while cleanup is incomplete.
- Use verifier and stack usage analysis for suspect drivers.
References for KERNEL_EXPAND_STACK_ACTIVE
Dump evidence for KERNEL_EXPAND_STACK_ACTIVE
For KERNEL_EXPAND_STACK_ACTIVE, preserve the complete dump, the four bug-check parameters, the exact Windows build, loaded-module list, and the event timeline immediately before the stop. For KERNEL_EXPAND_STACK_ACTIVE, allStat summarizes the condition as “A thread is terminating or attempting a win32 callout while running on an expanded stack.”; that sentence identifies the failure class, while the parameters and stack determine which object, driver, processor, or subsystem instance was involved.
Analysis order for KERNEL_EXPAND_STACK_ACTIVE
- Run WinDbg
!analyze -v, then inspect the documented meaning of each KERNEL_EXPAND_STACK_ACTIVE parameter instead of relying only on the probably-caused-by line. - For KERNEL_EXPAND_STACK_ACTIVE, find the earliest abnormal event: driver update, firmware change, device reset, storage error, verifier report, resource exhaustion, or application hang connected with kernel / expand / stack / active.
- For KERNEL_EXPAND_STACK_ACTIVE, keep third-party filter, security, storage, graphics, and virtualization drivers in the module inventory; removing evidence before dump analysis can obscure the responsible path.
Do not repeatedly reboot a machine affected by KERNEL_EXPAND_STACK_ACTIVE before collecting the dump and event logs. For KERNEL_EXPAND_STACK_ACTIVE, recovery actions should follow the component identified by the stack and parameters, not merely the symbolic stop-code name.
Dump evidence for KERNEL_EXPAND_STACK_ACTIVE
For KERNEL_EXPAND_STACK_ACTIVE, preserve the complete dump, the four bug-check parameters, the exact Windows build, loaded-module list, and the event timeline immediately before the stop. For KERNEL_EXPAND_STACK_ACTIVE, allStat summarizes the condition as “A thread is terminating or attempting a win32 callout while running on an expanded stack.”; that sentence identifies the failure class, while the parameters and stack determine which object, driver, processor, or subsystem instance was involved.
Analysis order for KERNEL_EXPAND_STACK_ACTIVE
- Run WinDbg
!analyze -v, then inspect the documented meaning of each KERNEL_EXPAND_STACK_ACTIVE parameter instead of relying only on the probably-caused-by line. - For KERNEL_EXPAND_STACK_ACTIVE, find the earliest abnormal event: driver update, firmware change, device reset, storage error, verifier report, resource exhaustion, or application hang connected with kernel / expand / stack / active.
- For KERNEL_EXPAND_STACK_ACTIVE, keep third-party filter, security, storage, graphics, and virtualization drivers in the module inventory; removing evidence before dump analysis can obscure the responsible path.
Do not repeatedly reboot a machine affected by KERNEL_EXPAND_STACK_ACTIVE before collecting the dump and event logs. For KERNEL_EXPAND_STACK_ACTIVE, recovery actions should follow the component identified by the stack and parameters, not merely the symbolic stop-code name.
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