I need some help debugging this deadlock. I would like to have general help but I am also wondering specifically about the call to KeWaitForSingleObject for thread ffffd50f38c4e040.
ffff8109`c62d8290 fffff809`25392ff2 : ffffd50f`345e0d00 00000000`00000000 ffffd50f`3dc63b00 00000000`00000000 : nt!KeWaitForSingleObject+0x233
ffff8109`c62d8380 fffff809`253bc3c6 : ffffd50f`3f4e51a0 ffffd50f`3dc63bc8 00000000`00000001 ffffd50f`441bfe00 : usbaudio!USBHwStopMIDIPipe+0x1a6
It seems that this thread is waiting for something with address ffffd50f3f4e51a0. If I do !locks ffffd50f3f4e51a0` I don’t get any information.
Below is all info that I have looked at so far.
3: kd> !locks
**** DUMP OF ALL RESOURCE OBJECTS ****
KD: Scanning for held locks..
Resource @ nt!IopDeviceTreeLock (0xfffff8032a059b20) Shared 1 owning threads
Contention Count = 117
Threads: ffffd50f38c4e040-01<*>
KD: Scanning for held locks.
Resource @ nt!PiEngineLock (0xfffff8032a059c20) Exclusively owned
Contention Count = 1839
NumberOfExclusiveWaiters = 1
Threads: ffffd50f38c4e040-01<*>
Threads Waiting On Exclusive Access:
ffffd50f3b66d040
KD: Scanning for held
39566 total locks, 2 locks currently held
-------------------------
3: kd> !locks -v fffff8032a059b20
Resource @ nt!IopDeviceTreeLock (0xfffff8032a059b20) Shared 1 owning threads
Contention Count = 117
Threads: ffffd50f38c4e040-01<*>
THREAD ffffd50f38c4e040 Cid 0004.01f4 Teb: 0000000000000000 Win32Thread: 0000000000000000 WAIT: (Executive) KernelMode Non-Alertable
ffffd50f345e0d00 NotificationEvent
IRP List:
ffffd50f409feab0: (0006,0550) Flags: 40000000 Mdl: 00000000
Not impersonating
DeviceMap ffffaa0f102467e0
Owning Process ffffd50f30eac040 Image: System
Attached Process N/A Image: N/A
Wait Start TickCount 919275 Ticks: 42240 (0:00:11:00.000)
Context Switch Count 64312 IdealProcessor: 3
UserTime 00:00:00.000
KernelTime 00:00:03.203
Win32 Start Address nt!ExpWorkerThread (0xfffff803296d95b0)
Stack Init ffff8109c62d8c90 Current ffff8109c62d7fc0
Base ffff8109c62d9000 Limit ffff8109c62d3000 Call 0000000000000000
Priority 13 BasePriority 12 PriorityDecrement 16 IoPriority 2 PagePriority 5
Child-SP RetAddr Call Site
ffff8109`c62d8000 fffff803`29656330 nt!KiSwapContext+0x76
ffff8109`c62d8140 fffff803`2965585f nt!KiSwapThread+0x500
ffff8109`c62d81f0 fffff803`29655103 nt!KiCommitThreadWait+0x14f
ffff8109`c62d8290 fffff809`25392ff2 nt!KeWaitForSingleObject+0x233
ffff8109`c62d8380 fffff809`253bc3c6 usbaudio!USBHwStopMIDIPipe+0x1a6
ffff8109`c62d83c0 fffff809`253ba60a usbaudio!USBHwStopAllMIDIPipes+0x42
ffff8109`c62d83f0 fffff809`253ba6b9 usbaudio!USBDeviceStop+0x3a
ffff8109`c62d8430 fffff809`253b136c usbaudio!USBDeviceSurpriseRemove+0x9
ffff8109`c62d8460 fffff809`27266ba3 usbaudio!DeviceSurpriseRemoval+0x20c
ffff8109`c62d84b0 fffff809`2725d5cb ks!CKsDevice::DispatchPnp+0x2e3
ffff8109`c62d8520 fffff809`253b19e3 ks!KsDispatchIrp+0xfb
ffff8109`c62d8550 fffff803`29785867 usbaudio!UsbAudioIrpDispatcher+0x143
ffff8109`c62d8590 fffff803`29ddcf1a nt!IopfCallDriver+0x53
ffff8109`c62d85d0 fffff803`29842189 nt!IovCallDriver+0x266
ffff8109`c62d8610 fffff809`252916bf nt!IofCallDriver+0x1f74e9
ffff8109`c62d8650 fffff809`25291023 ksthunk!CKernelFilterDevice::DispatchIrp+0x23b
ffff8109`c62d86b0 fffff803`29785867 ksthunk!CKernelFilterDevice::DispatchIrpBridge+0x13
ffff8109`c62d86e0 fffff803`29ddcf1a nt!IopfCallDriver+0x53
ffff8109`c62d8720 fffff803`29842189 nt!IovCallDriver+0x266
ffff8109`c62d8760 fffff803`29a864b4 nt!IofCallDriver+0x1f74e9
ffff8109`c62d87a0 fffff803`29b5e0c8 nt!IopSynchronousCall+0xf8
ffff8109`c62d8810 fffff803`29b5ba18 nt!IopRemoveDevice+0x108
ffff8109`c62d88c0 fffff803`29b5dcc4 nt!PnpSurpriseRemoveLockedDeviceNode+0xb0
ffff8109`c62d8920 fffff803`29b5d9bf nt!PnpDeleteLockedDeviceNode+0x88
ffff8109`c62d8960 fffff803`29b5c10a nt!PnpDeleteLockedDeviceNodes+0xf7
ffff8109`c62d89e0 fffff803`29b5280b nt!PnpProcessQueryRemoveAndEject+0x1da
ffff8109`c62d8ac0 fffff803`29ab69de nt!PnpProcessTargetDeviceEvent+0xeb
ffff8109`c62d8af0 fffff803`296d96b5 nt!PnpDeviceEventWorker+0x2ce
ffff8109`c62d8b70 fffff803`2971c8e5 nt!ExpWorkerThread+0x105
ffff8109`c62d8c10 fffff803`2981b4b8 nt!PspSystemThreadStartup+0x55
ffff8109`c62d8c60 00000000`00000000 nt!KiStartSystemThread+0x28
1 total locks
3: kd> !locks -v 0xfffff8032a059c20
Resource @ nt!PiEngineLock (0xfffff8032a059c20) Exclusively owned
Contention Count = 1839
NumberOfExclusiveWaiters = 1
Threads: ffffd50f38c4e040-01<*>
THREAD ffffd50f38c4e040 Cid 0004.01f4 Teb: 0000000000000000 Win32Thread: 0000000000000000 WAIT: (Executive) KernelMode Non-Alertable
ffffd50f345e0d00 NotificationEvent
IRP List:
ffffd50f409feab0: (0006,0550) Flags: 40000000 Mdl: 00000000
Not impersonating
DeviceMap ffffaa0f102467e0
Owning Process ffffd50f30eac040 Image: System
Attached Process N/A Image: N/A
Wait Start TickCount 919275 Ticks: 42240 (0:00:11:00.000)
Context Switch Count 64312 IdealProcessor: 3
UserTime 00:00:00.000
KernelTime 00:00:03.203
Win32 Start Address nt!ExpWorkerThread (0xfffff803296d95b0)
Stack Init ffff8109c62d8c90 Current ffff8109c62d7fc0
Base ffff8109c62d9000 Limit ffff8109c62d3000 Call 0000000000000000
Priority 13 BasePriority 12 PriorityDecrement 16 IoPriority 2 PagePriority 5
Child-SP RetAddr Call Site
ffff8109`c62d8000 fffff803`29656330 nt!KiSwapContext+0x76
ffff8109`c62d8140 fffff803`2965585f nt!KiSwapThread+0x500
ffff8109`c62d81f0 fffff803`29655103 nt!KiCommitThreadWait+0x14f
ffff8109`c62d8290 fffff809`25392ff2 nt!KeWaitForSingleObject+0x233
ffff8109`c62d8380 fffff809`253bc3c6 usbaudio!USBHwStopMIDIPipe+0x1a6
ffff8109`c62d83c0 fffff809`253ba60a usbaudio!USBHwStopAllMIDIPipes+0x42
ffff8109`c62d83f0 fffff809`253ba6b9 usbaudio!USBDeviceStop+0x3a
ffff8109`c62d8430 fffff809`253b136c usbaudio!USBDeviceSurpriseRemove+0x9
ffff8109`c62d8460 fffff809`27266ba3 usbaudio!DeviceSurpriseRemoval+0x20c
ffff8109`c62d84b0 fffff809`2725d5cb ks!CKsDevice::DispatchPnp+0x2e3
ffff8109`c62d8520 fffff809`253b19e3 ks!KsDispatchIrp+0xfb
ffff8109`c62d8550 fffff803`29785867 usbaudio!UsbAudioIrpDispatcher+0x143
ffff8109`c62d8590 fffff803`29ddcf1a nt!IopfCallDriver+0x53
ffff8109`c62d85d0 fffff803`29842189 nt!IovCallDriver+0x266
ffff8109`c62d8610 fffff809`252916bf nt!IofCallDriver+0x1f74e9
ffff8109`c62d8650 fffff809`25291023 ksthunk!CKernelFilterDevice::DispatchIrp+0x23b
ffff8109`c62d86b0 fffff803`29785867 ksthunk!CKernelFilterDevice::DispatchIrpBridge+0x13
ffff8109`c62d86e0 fffff803`29ddcf1a nt!IopfCallDriver+0x53
ffff8109`c62d8720 fffff803`29842189 nt!IovCallDriver+0x266
ffff8109`c62d8760 fffff803`29a864b4 nt!IofCallDriver+0x1f74e9
ffff8109`c62d87a0 fffff803`29b5e0c8 nt!IopSynchronousCall+0xf8
ffff8109`c62d8810 fffff803`29b5ba18 nt!IopRemoveDevice+0x108
ffff8109`c62d88c0 fffff803`29b5dcc4 nt!PnpSurpriseRemoveLockedDeviceNode+0xb0
ffff8109`c62d8920 fffff803`29b5d9bf nt!PnpDeleteLockedDeviceNode+0x88
ffff8109`c62d8960 fffff803`29b5c10a nt!PnpDeleteLockedDeviceNodes+0xf7
ffff8109`c62d89e0 fffff803`29b5280b nt!PnpProcessQueryRemoveAndEject+0x1da
ffff8109`c62d8ac0 fffff803`29ab69de nt!PnpProcessTargetDeviceEvent+0xeb
ffff8109`c62d8af0 fffff803`296d96b5 nt!PnpDeviceEventWorker+0x2ce
ffff8109`c62d8b70 fffff803`2971c8e5 nt!ExpWorkerThread+0x105
ffff8109`c62d8c10 fffff803`2981b4b8 nt!PspSystemThreadStartup+0x55
ffff8109`c62d8c60 00000000`00000000 nt!KiStartSystemThread+0x28
Threads Waiting On Exclusive Access:
ffffd50f3b66d040
1 total locks
3: kd> !thread ffffd50f38c4e040
THREAD ffffd50f38c4e040 Cid 0004.01f4 Teb: 0000000000000000 Win32Thread: 0000000000000000 WAIT: (Executive) KernelMode Non-Alertable
ffffd50f345e0d00 NotificationEvent
IRP List:
ffffd50f409feab0: (0006,0550) Flags: 40000000 Mdl: 00000000
Not impersonating
DeviceMap ffffaa0f102467e0
Owning Process ffffd50f30eac040 Image: System
Attached Process N/A Image: N/A
Wait Start TickCount 919275 Ticks: 42240 (0:00:11:00.000)
Context Switch Count 64312 IdealProcessor: 3
UserTime 00:00:00.000
KernelTime 00:00:03.203
Win32 Start Address nt!ExpWorkerThread (0xfffff803296d95b0)
Stack Init ffff8109c62d8c90 Current ffff8109c62d7fc0
Base ffff8109c62d9000 Limit ffff8109c62d3000 Call 0000000000000000
Priority 13 BasePriority 12 PriorityDecrement 16 IoPriority 2 PagePriority 5
Child-SP RetAddr : Args to Child : Call Site
ffff8109`c62d8000 fffff803`29656330 : fffff803`27dad180 fffff803`ffffffff ffffd50f`30e8c090 fffff803`299b79bf : nt!KiSwapContext+0x76
ffff8109`c62d8140 fffff803`2965585f : ffffd50f`00000000 00000000`00000003 ffff8109`c62d8300 ffffd50f`00000000 : nt!KiSwapThread+0x500
ffff8109`c62d81f0 fffff803`29655103 : fffff803`00000000 fffff809`00000000 00000000`00000000 ffffd50f`38c4e180 : nt!KiCommitThreadWait+0x14f
ffff8109`c62d8290 fffff809`25392ff2 : ffffd50f`345e0d00 00000000`00000000 ffffd50f`3dc63b00 00000000`00000000 : nt!KeWaitForSingleObject+0x233
ffff8109`c62d8380 fffff809`253bc3c6 : ffffd50f`3f4e51a0 ffffd50f`3dc63bc8 00000000`00000001 ffffd50f`441bfe00 : usbaudio!USBHwStopMIDIPipe+0x1a6
ffff8109`c62d83c0 fffff809`253ba60a : 00000000`00000000 ffffd50f`441bfd40 ffffd50f`3dc63bc8 ffffd50f`00000001 : usbaudio!USBHwStopAllMIDIPipes+0x42
ffff8109`c62d83f0 fffff809`253ba6b9 : 00000000`00000000 00000000`00000000 ffffd50f`400c1be0 00000000`00000000 : usbaudio!USBDeviceStop+0x3a
ffff8109`c62d8430 fffff809`253b136c : 00000000`00000000 ffffd50f`409feee0 ffffd50f`400c1be0 ffffd50f`3dc63bc8 : usbaudio!USBDeviceSurpriseRemove+0x9
ffff8109`c62d8460 fffff809`27266ba3 : ffffd50f`409feab0 ffffd50f`409feee0 ffffd50f`48e03c50 ffffd50f`48e03c50 : usbaudio!DeviceSurpriseRemoval+0x20c
ffff8109`c62d84b0 fffff809`2725d5cb : ffffd50f`400c1be0 ffffd50f`48e03c50 00000000`00000000 ffffad7d`6c200000 : ks!CKsDevice::DispatchPnp+0x2e3
ffff8109`c62d8520 fffff809`253b19e3 : ffffd50f`409feab0 ffffd50f`400c1be0 ffffd50f`409feee0 00000000`00000000 : ks!KsDispatchIrp+0xfb
ffff8109`c62d8550 fffff803`29785867 : ffffd50f`409feab0 00000000`00000000 ffffd50f`48e03c50 ffffd50f`00000000 : usbaudio!UsbAudioIrpDispatcher+0x143
ffff8109`c62d8590 fffff803`29ddcf1a : ffffd50f`409feab0 ffffd50f`48e03c50 ffffd50f`409feab0 ffff8109`c62d8648 : nt!IopfCallDriver+0x53
ffff8109`c62d85d0 fffff803`29842189 : ffffd50f`409feab0 ffff8109`c62d86a0 ffffd50f`409feab0 ffffd50f`34a945b0 : nt!IovCallDriver+0x266
ffff8109`c62d8610 fffff809`252916bf : ffff8109`c62d86a8 ffffd50f`409feab0 ffffd50f`47ce0480 fffff803`29a864b4 : nt!IofCallDriver+0x1f74e9
ffff8109`c62d8650 fffff809`25291023 : ffffd50f`409feab0 ffffd50f`48e04c70 ffffd50f`00000000 ffffd50f`34a94750 : ksthunk!CKernelFilterDevice::DispatchIrp+0x23b
ffff8109`c62d86b0 fffff803`29785867 : ffffd50f`409fef70 fffff803`29de91ae ffffd50f`00000001 ffffd50f`00000000 : ksthunk!CKernelFilterDevice::DispatchIrpBridge+0x13
ffff8109`c62d86e0 fffff803`29ddcf1a : ffffd50f`409feab0 ffffd50f`48e04c70 ffffd50f`409feab0 fffff803`29de96c9 : nt!IopfCallDriver+0x53
ffff8109`c62d8720 fffff803`29842189 : ffffd50f`48e04c70 00000000`00000000 ffffd50f`48e04c70 ffffd50f`34a94750 : nt!IovCallDriver+0x266
ffff8109`c62d8760 fffff803`29a864b4 : 00000000`00000000 ffffd50f`48e04c70 ffff8109`c62d8850 00000000`00000000 : nt!IofCallDriver+0x1f74e9
ffff8109`c62d87a0 fffff803`29b5e0c8 : 00000000`00000017 ffffd50f`3dc272c0 ffffd50f`45fe6cb0 ffffd50f`3dc272c0 : nt!IopSynchronousCall+0xf8
ffff8109`c62d8810 fffff803`29b5ba18 : ffffaa0f`25d45770 00000000`00000000 00000000`0000030a 00000000`00000308 : nt!IopRemoveDevice+0x108
ffff8109`c62d88c0 fffff803`29b5dcc4 : ffffd50f`45fe6cb0 00000000`00000000 00000000`00000000 fffff803`29b5dc0b : nt!PnpSurpriseRemoveLockedDeviceNode+0xb0
ffff8109`c62d8920 fffff803`29b5d9bf : ffffd50f`45fe6cb0 ffff8109`c62d89a0 00000000`00000000 fffff803`29b5d6f8 : nt!PnpDeleteLockedDeviceNode+0x88
ffff8109`c62d8960 fffff803`29b5c10a : ffffd50f`419d5060 00000008`00000002 00000000`00000000 00000000`00000000 : nt!PnpDeleteLockedDeviceNodes+0xf7
ffff8109`c62d89e0 fffff803`29b5280b : ffff8109`c62d8b20 ffffd50f`472e6c00 ffff8109`c62d8b00 ffffaa0f`00000008 : nt!PnpProcessQueryRemoveAndEject+0x1da
ffff8109`c62d8ac0 fffff803`29ab69de : ffffaa0f`25d45770 ffffaa0f`24fb7450 ffffd50f`30ea9c00 00000000`00000000 : nt!PnpProcessTargetDeviceEvent+0xeb
ffff8109`c62d8af0 fffff803`296d96b5 : ffffd50f`38c4e040 ffffd50f`38c4e040 ffffd50f`30ea9cb0 ffffd50f`3d7b5c60 : nt!PnpDeviceEventWorker+0x2ce
ffff8109`c62d8b70 fffff803`2971c8e5 : ffffd50f`38c4e040 00000000`00000080 ffffd50f`30eac040 fffff803`2965ca00 : nt!ExpWorkerThread+0x105
ffff8109`c62d8c10 fffff803`2981b4b8 : ffffbd81`1fd00180 ffffd50f`38c4e040 fffff803`2971c890 ffff8109`c62d8c80 : nt!PspSystemThreadStartup+0x55
ffff8109`c62d8c60 00000000`00000000 : ffff8109`c62d9000 ffff8109`c62d3000 00000000`00000000 00000000`00000000 : nt!KiStartSystemThread+0x28
-----------------------------------
3: kd> !thread ffffd50f3b66d040
THREAD ffffd50f3b66d040 Cid 0004.16c4 Teb: 0000000000000000 Win32Thread: 0000000000000000 WAIT: (WrResource) KernelMode Non-Alertable
ffff8109c4ced800 SynchronizationEvent
Not impersonating
DeviceMap ffffaa0f102467e0
Owning Process ffffd50f30eac040 Image: System
Attached Process N/A Image: N/A
Wait Start TickCount 961429 Ticks: 86 (0:00:00:01.343)
Context Switch Count 139163 IdealProcessor: 2
UserTime 00:00:00.000
KernelTime 00:00:06.281
Win32 Start Address nt!ExpWorkerThread (0xfffff803296d95b0)
Stack Init ffff8109c4cedc90 Current ffff8109c4ced360
Base ffff8109c4cee000 Limit ffff8109c4ce8000 Call 0000000000000000
Priority 13 BasePriority 13 PriorityDecrement 0 IoPriority 2 PagePriority 5
Child-SP RetAddr : Args to Child : Call Site
ffff8109`c4ced3a0 fffff803`29656330 : ffffbd81`00000009 00000000`ffffffff 00000000`00000000 ffffd50f`3b720158 : nt!KiSwapContext+0x76
ffff8109`c4ced4e0 fffff803`2965585f : ffffffff`00000e53 00000000`00000000 ffff8109`c4ced6a0 ffffd50f`00000000 : nt!KiSwapThread+0x500
ffff8109`c4ced590 fffff803`29655103 : 00000000`00000019 00000000`00000000 00000000`00000000 ffffd50f`3b66d180 : nt!KiCommitThreadWait+0x14f
ffff8109`c4ced630 fffff803`2965194d : ffff8109`c4ced800 ffffd50f`0000001b fffff803`29778700 fffff803`00000000 : nt!KeWaitForSingleObject+0x233
ffff8109`c4ced720 fffff803`2965b79e : fffff803`2a059c20 ffff8109`c4ced7e8 ffffaa0f`00010224 fffff803`29778710 : nt!ExpWaitForResource+0x6d
ffff8109`c4ced7a0 fffff803`29a8f336 : ffff8109`c4ced890 ffffd50f`348c2060 00000000`00000001 00000000`00000001 : nt!ExAcquireResourceExclusiveLite+0x1fe
ffff8109`c4ced830 fffff803`29b5b6bf : 00000000`00000000 ffffd50f`348c2060 00000000`00000000 fffff803`2a059b00 : nt!PpDevNodeLockTree+0xca
ffff8109`c4ced860 fffff803`29b5bcf9 : ffffd50f`482d4510 00000000`00000001 ffffd50f`482d4510 00000000`00000000 : nt!PnpDelayedRemoveWorker+0x2f
ffff8109`c4ced8a0 fffff803`29878528 : 00000000`00000000 ffffd50f`30ec66e0 ffffd50f`348c2060 00000000`000000ff : nt!PnpChainDereferenceComplete+0xfd
ffff8109`c4ced8d0 fffff803`296499d2 : ffffd50f`348c2060 00000000`00000001 ffffbd81`1ffe6910 00000000`00000000 : nt!IopCompleteUnloadOrDelete+0x172ae8
ffff8109`c4ced990 fffff803`29a57270 : ffffd50f`48f6c260 00000000`00000000 00000000`00000000 00000000`00000000 : nt!IopDecrementDeviceObjectRef+0x162
ffff8109`c4ced9f0 fffff803`29a5a950 : ffffd50f`30ef9140 00000000`00000000 ffffd50f`48f6c230 00000000`00000000 : nt!IopDeleteFile+0x210
ffff8109`c4ceda70 fffff803`29afd724 : 00000000`00000000 ffffd50f`48f6c230 fffff803`29afd520 ffffd50f`30ea9cb0 : nt!ObpRemoveObjectRoutine+0x80
ffff8109`c4cedad0 fffff803`296d96b5 : ffffd50f`3b66d040 fffff803`29afd520 ffffd50f`30ea9cb0 fffff803`00000000 : nt!ObpProcessRemoveObjectQueue+0x204
ffff8109`c4cedb70 fffff803`2971c8e5 : ffffd50f`3b66d040 00000000`00000080 ffffd50f`30eac040 c7c7c7c7`c7c7c700 : nt!ExpWorkerThread+0x105
ffff8109`c4cedc10 fffff803`2981b4b8 : ffffbd81`1ffe6180 ffffd50f`3b66d040 fffff803`2971c890 c7c7c7c7`c7c7c7c7 : nt!PspSystemThreadStartup+0x55
ffff8109`c4cedc60 00000000`00000000 : ffff8109`c4cee000 ffff8109`c4ce8000 00000000`00000000 00000000`00000000 : nt!KiStartSystemThread+0x28
How is YOUR driver involved in this? Usbaudio is trying to stop all activity on the MIDI endpoints in response to a surprise removal, and is apparently waiting for some unfinished activity on the pipe.
The device (also developed by me) exposes some USB interfaces that requires a custom driver. The device also expose USB interfaces which implements class compliant MIDI. Maybe there is something that needs to be done in the device so that the pipe can shutdown?
On the other hand there is nothing the device can do since it has been removed. I have an automatable USB switch and with that I can attach / detach the device many times. The above deadlock never happens with a device from another manufacturer.
It is generally the driver’s responsibility to terminate all outstanding IO operations that it controls from the driver to the (now missing) device. Are you using WDF for your driver? That would make handling surprise remove correctly easier. It would also aid in debugging as you could easily see if your driver has outstanding requests for your device.
Yes, I am using WDF.
Could some outstanding IO in my driver, that uses the vendor interfaces in the device, cause a class compliant driver to hang?
I did not have time to look at this for some time but I’ve been testing a bit more.
The device that I am using can also be configured to only expose class compliant audio and midi interfaces. If I put the device in that mode and after some time of attaching and detaching the device, the sound settings shows the device as available, even if the device is unplugged. If I then detach and attach the mouse I get a deadlock detected in Windbg:
Possible deadlock. Use !locks FFFFF80656252C40 to determine the resource owner
Break instruction exception - code 80000003 (first chance)
nt!ExpWaitForResource+0x1f25fa:
fffff806`55a3ceda cc int 3
0: kd> !locks FFFFF80656252C40
Resource @ nt!PiEngineLock (0xfffff80656252c40) Exclusively owned
Contention Count = 867
NumberOfExclusiveWaiters = 1
Threads: ffffb486b1981080-01<*>
Threads Waiting On Exclusive Access:
1 total locks
0: kd> !thread ffffb486b1981080
THREAD ffffb486b1981080 Cid 0004.00ec Teb: 0000000000000000 Win32Thread: 0000000000000000 WAIT: (Executive) KernelMode Non-Alertable
ffffb486b97f4e70 NotificationEvent
IRP List:
ffffb486b564aab0: (0006,0550) Flags: 40000000 Mdl: 00000000
Not impersonating
DeviceMap ffffc983f9646420
Owning Process ffffb486b18cc040 Image: System
Attached Process N/A Image: N/A
Wait Start TickCount 148625 Ticks: 3059454 (0:13:16:43.968)
Context Switch Count 38827 IdealProcessor: 2
UserTime 00:00:00.000
KernelTime 00:00:01.703
Win32 Start Address nt!ExpWorkerThread (0xfffff806558d25b0)
Stack Init ffffc8023c1cbc90 Current ffffc8023c1cafc0
Base ffffc8023c1cc000 Limit ffffc8023c1c6000 Call 0000000000000000
Priority 12 BasePriority 12 PriorityDecrement 0 IoPriority 2 PagePriority 5
Child-SP RetAddr : Args to Child : Call Site
ffffc802`3c1cb000 fffff806`5584f330 : ffffe780`3eb6c180 fffff806`ffffffff ffffb486`b188ff50 fffff806`55bb09bf : nt!KiSwapContext+0x76
ffffc802`3c1cb140 fffff806`5584e85f : ffffb486`00000003 00000000`00000002 ffffc802`3c1cb300 ffffb486`00000000 : nt!KiSwapThread+0x500
ffffc802`3c1cb1f0 fffff806`5584e103 : fffff806`00000000 fffff80e`00000000 00000000`00000000 ffffb486`b19811c0 : nt!KiCommitThreadWait+0x14f
ffffc802`3c1cb290 fffff80e`a1522ff2 : ffffb486`b97f4e70 00000000`00000000 ffffb486`bb6e6000 00000000`00000000 : nt!KeWaitForSingleObject+0x233
ffffc802`3c1cb380 fffff80e`a154c3c6 : ffffb486`bbce55c0 ffffb486`bb6e60d8 00000000`00000001 ffffb486`bad03c50 : usbaudio!USBHwStopMIDIPipe+0x1a6
ffffc802`3c1cb3c0 fffff80e`a154a60a : 00000000`00000000 ffffb486`bad03b90 ffffb486`bb6e60d8 ffffb486`00000001 : usbaudio!USBHwStopAllMIDIPipes+0x42
ffffc802`3c1cb3f0 fffff80e`a154a6b9 : 00000000`00000000 00000000`00000000 ffffb486`bc22dbe0 ffffffff`ffffffff : usbaudio!USBDeviceStop+0x3a
ffffc802`3c1cb430 fffff80e`a154136c : 00000000`00000000 ffffb486`b564aee0 ffffb486`bc22dbe0 ffffb486`bb6e60d8 : usbaudio!USBDeviceSurpriseRemove+0x9
ffffc802`3c1cb460 fffff80e`7c546ba3 : ffffb486`b564aab0 ffffb486`b564aee0 ffffb486`bb78e650 ffffb486`bb78e650 : usbaudio!DeviceSurpriseRemoval+0x20c
ffffc802`3c1cb4b0 fffff80e`7c53d5cb : ffffb486`bc22dbe0 ffffb486`bb78e650 00000000`00000000 ffffd770`18000000 : ks!CKsDevice::DispatchPnp+0x2e3
ffffc802`3c1cb520 fffff80e`a15419e3 : ffffb486`b564aab0 ffffb486`bc22dbe0 ffffb486`b564aee0 00000000`00000000 : ks!KsDispatchIrp+0xfb
ffffc802`3c1cb550 fffff806`5597e867 : ffffb486`b564aab0 00000000`00000000 ffffb486`bb78e650 ffffb486`00000000 : usbaudio!UsbAudioIrpDispatcher+0x143
ffffc802`3c1cb590 fffff806`55fd5f1a : ffffb486`b564aab0 ffffb486`bb78e650 ffffb486`b564aab0 ffffc802`3c1cb648 : nt!IopfCallDriver+0x53
ffffc802`3c1cb5d0 fffff806`55a3b189 : ffffb486`b564aab0 ffffc802`3c1cb6a0 ffffb486`b564aab0 ffffb486`ba326d50 : nt!IovCallDriver+0x266
ffffc802`3c1cb610 fffff80e`80c016bf : ffffc802`3c1cb6a8 ffffb486`b564aab0 ffffb486`bbc41260 fffff806`55c7f4b4 : nt!IofCallDriver+0x1f74e9
ffffc802`3c1cb650 fffff80e`80c01023 : ffffb486`b564aab0 ffffb486`ba8e72b0 ffffb486`00000000 ffffb486`ba329110 : ksthunk!CKernelFilterDevice::DispatchIrp+0x23b
ffffc802`3c1cb6b0 fffff806`5597e867 : ffffb486`b564af70 fffff806`55fe21ae ffffb486`00000001 ffffb486`00000000 : ksthunk!CKernelFilterDevice::DispatchIrpBridge+0x13
ffffc802`3c1cb6e0 fffff806`55fd5f1a : ffffb486`b564aab0 ffffb486`ba8e72b0 ffffb486`b564aab0 fffff806`55fe26c9 : nt!IopfCallDriver+0x53
ffffc802`3c1cb720 fffff806`55a3b189 : ffffb486`ba8e72b0 00000000`00000000 ffffb486`ba8e72b0 ffffb486`ba329110 : nt!IovCallDriver+0x266
ffffc802`3c1cb760 fffff806`55c7f4b4 : 00000000`00000000 ffffb486`ba8e72b0 ffffc802`3c1cb850 00000000`00000000 : nt!IofCallDriver+0x1f74e9
ffffc802`3c1cb7a0 fffff806`55d57128 : 00000000`00000017 ffffb486`bb906800 ffffb486`bb11ecc0 ffffb486`bb906800 : nt!IopSynchronousCall+0xf8
ffffc802`3c1cb810 fffff806`55d54a78 : ffffc984`04f8a390 00000000`00000000 00000000`0000030a 00000000`00000308 : nt!IopRemoveDevice+0x108
ffffc802`3c1cb8c0 fffff806`55d56d24 : ffffb486`bb11ecc0 00000000`00000000 00000000`00000000 fffff806`55d56c6b : nt!PnpSurpriseRemoveLockedDeviceNode+0xb0
ffffc802`3c1cb920 fffff806`55d56a1f : ffffb486`bb11ecc0 ffffc802`3c1cb9a0 00000000`00000000 fffff806`55d566b9 : nt!PnpDeleteLockedDeviceNode+0x88
ffffc802`3c1cb960 fffff806`55d5516a : ffffb486`bcc8a0a0 00000007`00000002 00000000`00000000 00000000`00000000 : nt!PnpDeleteLockedDeviceNodes+0xf7
ffffc802`3c1cb9e0 fffff806`55d4b86b : ffffc802`3c1cbb20 ffffb486`b9d43c00 ffffc802`3c1cbb00 ffffc984`00000007 : nt!PnpProcessQueryRemoveAndEject+0x1da
ffffc802`3c1cbac0 fffff806`55caf9de : ffffc984`04f8a390 ffffc984`024393f0 ffffb486`b18acc00 00000000`00000000 : nt!PnpProcessTargetDeviceEvent+0xeb
ffffc802`3c1cbaf0 fffff806`558d26b5 : ffffb486`b1981080 ffffb486`b1981080 ffffb486`b18acce0 ffffb486`bb0f9c80 : nt!PnpDeviceEventWorker+0x2ce
ffffc802`3c1cbb70 fffff806`559158e5 : ffffb486`b1981080 00000000`00000080 ffffb486`b18cc040 00000000`00000000 : nt!ExpWorkerThread+0x105
ffffc802`3c1cbc10 fffff806`55a144b8 : ffffe780`3ede6180 ffffb486`b1981080 fffff806`55915890 00000000`00000000 : nt!PspSystemThreadStartup+0x55
ffffc802`3c1cbc60 00000000`00000000 : ffffc802`3c1cc000 ffffc802`3c1c6000 00000000`00000000 00000000`00000000 : nt!KiStartSystemThread+0x28