wdm-irqlexapclte2.md

title	description	ms.date	keywords	topic_type	ms.topic	api_name	api_type
IrqlExApcLte2 Rule (WDM)	The IrqlExApcLte2 rule specifies that the driver calls the following routines only at IRQL less than or equal to APC_LEVEL.	07/21/2021	IrqlExApcLte2 rule (wdm)	apiref	reference	IrqlExApcLte2	NA

IrqlExApcLte2 rule (wdm)

The IrqlExApcLte2 rule specifies that the driver calls the following routines only at IRQL less than or equal to APC_LEVEL.

• CmRegisterCallback

• CmUnRegisterCallback

• ExAllocateFromPagedLookasideList

• ExAllocatePoolWithQuota

• ExAllocatePoolWithQuotaTag

• ExDeletePagedLookasideList

• ExFreeToPagedLookasideList

• ExInitializePagedLookasideList

• ExRegisterCallback

• ExSetTimerResolution

• ExUnregisterCallback

• ProbeForRead

• ProbeForWrite

Driver model: WDM

Bug check(s) found with this rule: Bug Check 0xC4: DRIVER_VERIFIER_DETECTED_VIOLATION (0x00020006), Bug Check 0xA: IRQL_NOT_LESS_OR_EQUAL

How to test

At compile time
Run Static Driver Verifier and specify the IrqlExApcLte2 rule. Use the following steps to run an analysis of your code: Prepare your code (use role type declarations). Run Static Driver Verifier. View and analyze the results. For more information, see Using Static Driver Verifier to Find Defects in Drivers.

At run time
Run Driver Verifier and select the DDI compliance checking option.

Applies to

CmRegisterCallback CmRegisterCallbackEx CmUnRegisterCallback ExDeletePagedLookasideList ExInitializePagedLookasideList ExRegisterCallback ExSetTimerResolution ExUnregisterCallback ProbeForRead ProbeForWrite