SpinlockRelease rule (wdm)

The SpinlockRelease rule specifies that calls to KeReleaseSpinLock are made in strict alternation with KeAcquireSpinLock and KeAcquireSpinLockRaiseToDpc. That is, the driver must call KeReleaseSpinLock after calling KeAcquireSpinLock or KeAcquireSpinLockRaiseToDpc and before subsequent calls to KeAcquireSpinLock or to KeAcquireSpinLockRaiseToDpc.

Driver model: WDM

Bug check(s) found with this rule: Bug Check 0xC4: DRIVER_VERIFIER_DETECTED_VIOLATION (0x0004000B)

How to test

At compile time
Run Static Driver Verifier and specify the SpinlockRelease 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 (additional) option.

Applies to

KeAcquireSpinLock KeAcquireSpinLockRaiseToDpc KeReleaseSpinLock KeTryToAcquireSpinLockAtDpcLevel