It seems the driver is stuck on some sort of lock (spinlock?), but I am not sure, as I don't have PDB symbols. I have 2 cases of the manually created dumps of threads with high cpu - with the latest OEM drivers. Both threads are stuck at the same stacktrace, it looks they are spinning there. The info on the driver version is below the stacktrace. If you want a minidump or any other information - feel free to contact me. Thanks. Peter Kubini (peter.kubini@gmail.com) -------------------------------------------------------------------------------------------------- Dump #1: -------------------------------------------------------------------------------------------------- 0: kd> !thread -t 0n6168 THREAD ffffc30a81b6e040 Cid 0004.1818 Teb: 0000000000000000 Win32Thread: 0000000000000000 RUNNING on processor 3 Not impersonating DeviceMap ffffad0f5e2133c0 Owning Process ffffc30a756ba040 Image: System Attached Process N/A Image: N/A Wait Start TickCount 1082154 Ticks: 50 (0:00:00:00.781) Context Switch Count 171647 IdealProcessor: 3 UserTime 00:00:00.000 KernelTime 00:33:52.453 Win32 Start Address nt!ExpWorkerThread (0xfffff804516f42b0) Stack Init ffffe80ddd0ffc50 Current ffffe80ddd0ff110 Base ffffe80ddd100000 Limit ffffe80ddd0f9000 Call 0000000000000000 Priority 13 BasePriority 13 PriorityDecrement 0 IoPriority 2 PagePriority 5 Child-SP RetAddr : Args to Child : Call Site ffffe80d`dd0ff550 fffff804`6a204c73 : 00000000`00000012 ffffc30a`7cb4b4f0 00000000`00000011 ffffc30a`7bcf3710 : Netwbw02+0x1c404 ffffe80d`dd0ff590 fffff804`6a10b339 : 00000000`00000000 00000000`00000000 ffffc30a`7768fab8 ffffc30a`7bcf37e0 : Netwbw02+0x204c73 ffffe80d`dd0ff600 fffff804`6a0a8885 : ffffc30a`77698de0 00000000`00000000 ffffc30a`7ba9e7b0 fffff804`6a0a8406 : Netwbw02+0x10b339 ffffe80d`dd0ff680 fffff804`6a093c1b : ffffc30a`79216b50 00000000`00000000 ffffc30a`7769d620 00000000`00000000 : Netwbw02+0xa8885 ffffe80d`dd0ff6d0 fffff804`6a08d661 : ffffc30a`79216b50 ffffe80d`dd0ff8a0 00000000`00003151 ffffc30a`7cb4b4f0 : Netwbw02+0x93c1b ffffe80d`dd0ff720 fffff804`6a0a0ae5 : 00000000`00000000 00000000`000419f2 00000000`00000001 00000000`00003151 : Netwbw02+0x8d661 ffffe80d`dd0ff760 fffff804`6a09bc9e : ffffc30a`7768fb01 01d61966`00100000 00000000`000419f2 00000000`00000001 : Netwbw02+0xa0ae5 ffffe80d`dd0ff7a0 fffff804`6a07081e : fffff804`56545050 00000000`00000001 fffff804`6a215290 00000000`00000000 : Netwbw02+0x9bc9e ffffe80d`dd0ff920 fffff804`564f73d2 : ffffc30a`7cb4b4f0 ffffc30a`7bb3c1a0 ffffc30a`7bb3ea80 ffffe80d`dd0ffa10 : Netwbw02+0x7081e ffffe80d`dd0ff970 fffff804`564fbe32 : ffffc30a`7bb3c1a0 00000000`00000070 00000000`00000000 00000000`00000003 : ndis!ndisMInvokeReset+0x76 ffffe80d`dd0ff9c0 fffff804`564f7a3d : 00000000`00000000 ffffc30a`7bb3c1a0 ffffc30a`756bbd10 ffffc30a`8ab4cba0 : ndis!ndisMResetMiniportInternal+0x286 ffffe80d`dd0ffad0 fffff804`5647cb80 : ffffc30a`81b6e040 fffff804`51a34ce0 ffffc30a`756bbd10 fffff804`51d18cb0 : ndis!ndisQueuedResetMiniport+0x1d ffffe80d`dd0ffb00 fffff804`516f43b5 : ffffc30a`756bbd10 ffffc30a`756bbd00 fffff804`51a63400 00000000`00000000 : ndis!ndisWorkItemHandler+0x10 ffffe80d`dd0ffb30 fffff804`5166bcd5 : ffffc30a`81b6e040 00000000`00000080 ffffc30a`756ba040 00000000`00000000 : nt!ExpWorkerThread+0x105 ffffe80d`dd0ffbd0 fffff804`517c9998 : fffff804`4bf97180 ffffc30a`81b6e040 fffff804`5166bc80 00007ff8`274d0000 : nt!PspSystemThreadStartup+0x55 ffffe80d`dd0ffc20 00000000`00000000 : ffffe80d`dd100000 ffffe80d`dd0f9000 00000000`00000000 00000000`00000000 : nt!KiStartSystemThread+0x28 0: kd> !lmi Netwbw02 Loaded Module Info: [netwbw02] Module: Netwbw02 Base Address: fffff8046a000000 Image Name: Netwbw02.sys Machine Type: 34404 (X64) Time Stamp: 57fa69b6 Sun Oct 9 18:00:54 2016 Size: 38c000 CheckSum: 35e91c Characteristics: 22 Debug Data Dirs: Type Size VA Pointer CODEVIEW 90, 251f50, 250950 RSDS - GUID: {DCCCAF7E-E012-46BB-A484-2E9F35D7FAA7} Age: 1, Pdb: D:\jkp\workspace\WFWDRV_P4\18100\WFDRV26902\Source\drv\win_driver\Win_Driver\Miniport\WinB\obj_rel_winBx64\Netwbw02.pdb POGO 348, 251fe0, 2509e0 [Data not mapped] Image Type: MEMORY - Image read successfully from loaded memory. Symbol Type: NONE - PDB not found from symbol server. Load Report: no symbols loaded -------------------------------------------------------------------------------------------------- Dump #2: -------------------------------------------------------------------------------------------------- 0: kd> !thread -t 0n14696 THREAD ffffa08c965f66c0 Cid 0004.3968 Teb: 0000000000000000 Win32Thread: 0000000000000000 RUNNING on processor 2 Not impersonating DeviceMap ffffcb078cc134e0 Owning Process ffffa08c84c81040 Image: System Attached Process N/A Image: N/A Wait Start TickCount 11880855 Ticks: 31 (0:00:00:00.484) Context Switch Count 992166 IdealProcessor: 2 UserTime 00:00:00.000 KernelTime 00:42:08.921 Win32 Start Address nt!ExpWorkerThread (0xfffff801488f42b0) Stack Init ffff9d861bf57c50 Current ffff9d861bf57110 Base ffff9d861bf58000 Limit ffff9d861bf51000 Call 0000000000000000 Priority 13 BasePriority 13 PriorityDecrement 0 IoPriority 2 PagePriority 5 Child-SP RetAddr : Args to Child : Call Site ffff9d86`1bf57550 fffff801`608e4c73 : 00000000`00000012 ffffa08c`867118a0 00000000`00000011 ffffa08c`86e22310 : Netwbw02+0x1c404 ffff9d86`1bf57590 fffff801`607eb339 : 00000000`00000000 00000000`00000000 ffffa08c`87601608 ffffa08c`86e223f0 : Netwbw02+0x204c73 ffff9d86`1bf57600 fffff801`60788885 : ffffa08c`87618de0 00000000`00000000 ffffa08c`8b362310 fffff801`60788406 : Netwbw02+0x10b339 ffff9d86`1bf57680 fffff801`60773c1b : ffffa08c`8c5ddd30 00000000`00000000 ffffa08c`8760ba40 00000000`00000000 : Netwbw02+0xa8885 ffff9d86`1bf576d0 fffff801`6076d661 : ffffa08c`8c5ddd30 ffff9d86`1bf578a0 00000000`00003151 ffffa08c`867118a0 : Netwbw02+0x93c1b ffff9d86`1bf57720 fffff801`60780ae5 : 00000000`00000000 00000000`00133dc9 00000000`00000001 00000000`00003151 : Netwbw02+0x8d661 ffff9d86`1bf57760 fffff801`6077bc9e : ffffa08c`875d2501 01d61ee9`00100000 00000000`00133dc9 00000000`00000001 : Netwbw02+0xa0ae5 ffff9d86`1bf577a0 fffff801`6075081e : fffff801`4bb05050 00000000`00000001 fffff801`608f5290 00000000`00000000 : Netwbw02+0x9bc9e ffff9d86`1bf57920 fffff801`4bab73d2 : ffffa08c`867118a0 ffffa08c`8b23b1a0 ffffa08c`8b23a990 ffff9d86`1bf57a10 : Netwbw02+0x7081e ffff9d86`1bf57970 fffff801`4babbe32 : ffffa08c`8b23b1a0 00000000`00000070 00000000`00000000 00000000`00000003 : ndis!ndisMInvokeReset+0x76 ffff9d86`1bf579c0 fffff801`4bab7a3d : 00000000`00000000 ffffa08c`8b23b1a0 ffffa08c`84c94c20 ffffa08c`9ab0f440 : ndis!ndisMResetMiniportInternal+0x286 ffff9d86`1bf57ad0 fffff801`4ba3cb80 : ffffa08c`965f66c0 fffff801`48c34ce0 ffffa08c`84c94c20 fffff801`48f18cb0 : ndis!ndisQueuedResetMiniport+0x1d ffff9d86`1bf57b00 fffff801`488f43b5 : ffffa08c`84c94c20 ffffa08c`84c94c00 fffff801`48c63400 ffffa08c`84c94c20 : ndis!ndisWorkItemHandler+0x10 ffff9d86`1bf57b30 fffff801`4886bcd5 : ffffa08c`965f66c0 00000000`00000080 ffffa08c`84c81040 00000000`00000001 : nt!ExpWorkerThread+0x105 ffff9d86`1bf57bd0 fffff801`489c9998 : ffff8b00`d8980180 ffffa08c`965f66c0 fffff801`4886bc80 00007ffa`e9560000 : nt!PspSystemThreadStartup+0x55 ffff9d86`1bf57c20 00000000`00000000 : ffff9d86`1bf58000 ffff9d86`1bf51000 00000000`00000000 00000000`00000000 : nt!KiStartSystemThread+0x28 0: kd> !lmi Netwbw02 Loaded Module Info: [netwbw02] Module: Netwbw02 Base Address: fffff801606e0000 Image Name: Netwbw02.sys Machine Type: 34404 (X64) Time Stamp: 57fa69b6 Sun Oct 9 18:00:54 2016 Size: 38c000 CheckSum: 3607e7 Characteristics: 22 Debug Data Dirs: Type Size VA Pointer CODEVIEW 90, 251f50, 250950 RSDS - GUID: {DCCCAF7E-E012-46BB-A484-2E9F35D7FAA7} Age: 1, Pdb: D:\jkp\workspace\WFWDRV_P4\18100\WFDRV26902\Source\drv\win_driver\Win_Driver\Miniport\WinB\obj_rel_winBx64\Netwbw02.pdb POGO 348, 251fe0, 2509e0 [Data not mapped] Image Type: MEMORY - Image read successfully from loaded memory. Symbol Type: NONE - PDB not found from symbol server. Load Report: no symbols loaded