I need help with system assert (c0000420) on debugger

NTDEV
1

Problem: In non-debug environment system locks up, the only option is to reboot

Detail: All I see the follwoing system assert and there is nothing related to my driver or any another driver in all the system CPU(s). Any help how to debug this further.

Assertion failure - code c0000420 (first chance)
1: kd> kb
RetAddr : Args to Child : Call Site
fffff8000266ae7f : 0000000000000000 fffffa6001727bc0 000003c4ef1a22a5 fffffa6001703a00 : nt! ?? ::FNODOBFM::string’+0x2e75
fffffa60009eb552 : fffffa60009ea435 0000000cb8d066ea 0000000000000001 fffffa6001700180 : nt!KiSecondaryClockInterrupt+0x11f fffffa60009ea435 : 0000000cb8d066ea 0000000000000001 fffffa6001700180 fffffa6001700180 : processr!C1Halt+0x2
fffff80002675b83 : 0000000001cae679 000000000000000c fffffa60017007f0 fffffa6001703580 : processr!C1Idle+0x9 fffff800026758a1 : fffffa6001700180 fffffa6000000000 0000000cb8faa9d0 0000000000000000 : nt!PoIdle+0x183
fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiIdleLoop+0x21 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 0068000000000000 : 0xfffffa60 1: kd\> ~0 0: kd\> kb RetAddr : Args to Child : Call Site fffff80002a592c2 : 0000000000000000 fffffa6001bc3990 0000000073504669 fffffa6001bc3730 : nt!KeFreezeExecution+0x65
fffff800026c6db4 : fffffa6001bc3240 fffffa6001bc3910 fffffa6000861110 fffffa8007124aa0 : nt!KdEnterDebugger+0x72 fffff80002a59133 : fffffa6001bc3240 fffffa6001bc3990 fffffa6001bc3910 fffffa800384f040 : nt! ?? ::FNODOBFM::string'+0xe804 fffff800026aa6f2 : fffffa6001bc3868 fffffa6001bc3910 fffffa6001bc3910 fffffa80043243a0 : nt!KdpTrap+0x2f
fffff800026712a9 : fffffa6001bc3868 fffff8000278a680 fffffa6001bc3910 0000000000026160 : nt!KiDispatchException+0xae fffff80002670970 : 0000000000000000 0000000000000000 0000000000000046 fffff8000266a5b1 : nt!KiExceptionDispatch+0xa9
fffff8000262d421 : ffff0000062a3f86 0000000000000282 fffff8000278a680 fffffa60078317b5 : nt!KiRaiseAssertion+0xb0 fffff8000266ad4a : fffff80002b5c460 fffffa6001bc3bc0 000003c4ef1a2c7e fffff80002b5c460 : nt! ?? ::FNODOBFM::string'+0x2e75 fffff80002b39f04 : 0000000000000000 0000000000000000 0000000000000000 fffff8000266a501 : nt!KeUpdateSystemTime+0xea
fffff8000266a50d : fffffa80092313b8 fffffa8004326d00 fffffa8004326328 fffffa8008fe5c08 : hal!HalpHpetClockInterrupt+0x8c fffff8000263c6cc : fffffa80043243a0 fffffa80043243a0 fffffa80043243a0 fffffa8004326328 : nt!KiInterruptDispatchNoLock+0x14d
fffff8000287bf37 : fffffa60078327d0 fffffa8004326328 fffffa800384f040 91fa60c3cededa01 : nt!KiExecuteDpc+0xec fffff800026ae616 : fffffa60017de180 fffffa800384f040 fffffa60017e7d40 0000000000000000 : nt!PspSystemThreadStartup+0x57
0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiStartSystemThread+0x16 0: kd\> ~2 2: kd\> kb RetAddr : Args to Child : Call Site fffff800026a9f11 : 0000000000000000 fffffa6002cbf6b2 0000000000000002 fffffa80051f1628 : nt!KxWaitForSpinLockAndAcquire+0x27
fffff80002a592c2 : 0000000000000000 fffffa60017969f0 0000000000000001 fffffa6001796790 : nt!KeFreezeExecution+0x71 fffff800026c6db4 : fffffa60017962a0 fffffa6001796970 0000000000000000 fffffa800716b860 : nt!KdEnterDebugger+0x72
fffff80002a59133 : fffffa60017962a0 fffffa60017969f0 fffffa6001796970 fffffa6001778d40 : nt! ?? ::FNODOBFM::string’+0xe804
fffff800026aa6f2 : fffffa60017968c8 fffffa6001796970 fffffa6001796970 fffffa6002c020d4 : nt!KdpTrap+0x2f fffff800026712a9 : fffffa60017968c8 fffffa600176f180 fffffa6001796970 0000000000026160 : nt!KiDispatchException+0xae
fffff80002670970 : fffffa8003d461b0 fffffa8004175b30 fffffa8005f0a000 00000000000001f8 : nt!KiExceptionDispatch+0xa9 fffff8000262d421 : fffffa600176f180 fffffa6001796b40 0000000000026160 fffffa6001778d40 : nt!KiRaiseAssertion+0xb0
fffff8000266ae7f : 0000000000000000 fffffa6001796bc0 000003c4ef1a22e9 fffffa6001772a00 : nt! ?? ::FNODOBFM::string’+0x2e75
fffffa60009eb552 : fffffa60009ea435 0000000cb8d06790 0000000000000000 0000000000000001 : nt!KiSecondaryClockInterrupt+0x11f fffffa60009ea435 : 0000000cb8d06790 0000000000000000 0000000000000001 fffffa600176f180 : processr!C1Halt+0x2
fffff80002675b83 : fffffa80051f0118 fffffa6001772580 fffffa8004bd88e0 0000000000000000 : processr!C1Idle+0x9 fffff800026758a1 : fffffa600176f180 fffffa6000000000 0000000cb8faaa76 0000000000000000 : nt!PoIdle+0x183
fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiIdleLoop+0x21 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 0068000000000000 : 0xfffffa60 2: kd\> ~3 3: kd\> kb RetAddr : Args to Child : Call Site fffff800026a9f11 : 0000000000000000 0000000000000003 0000000000000000 0000000000000000 : nt!KxWaitForSpinLockAndAcquire+0x24
fffff80002a592c2 : 0000000000000000 fffffa60005fc9f0 fffffa800432a6f0 fffffa60005fc790 : nt!KeFreezeExecution+0x71 fffff800026c6db4 : fffffa60005fc2a0 fffffa60005fc970 0000000000000000 0000000000000000 : nt!KdEnterDebugger+0x72
fffff80002a59133 : fffffa60005fc2a0 fffffa60005fc9f0 fffffa60005fc970 fffffa60017e7d40 : nt! ?? ::FNODOBFM::string’+0xe804
fffff800026aa6f2 : fffffa60005fc8c8 fffffa60005fc970 fffffa60005fc970 fffffa6002c020d4 : nt!KdpTrap+0x2f fffff800026712a9 : fffffa60005fc8c8 fffffa60017de180 fffffa60005fc970 0000000000026160 : nt!KiDispatchException+0xae
fffff80002670970 : fffffa8003d461b0 fffffa8004175b30 fffffa8005f0a000 00000000000001c0 : nt!KiExceptionDispatch+0xa9 fffff8000262d421 : fffffa60017de180 fffffa60005fcb40 0000000000026160 fffffa60017e7d40 : nt!KiRaiseAssertion+0xb0
fffff8000266ae7f : 0000000000000000 fffffa60005fcbc0 000003c4ef1a2335 fffffa60017e1a00 : nt! ?? ::FNODOBFM::string’+0x2e75
fffffa60009eb552 : fffffa60009ea435 0000000cb8d066ff 0000000000000000 fffffa60017de180 : nt!KiSecondaryClockInterrupt+0x11f fffffa60009ea435 : 0000000cb8d066ff 0000000000000000 fffffa60017de180 fffffa60017e1580 : processr!C1Halt+0x2
fffff80002675b83 : 0000000000000000 fffffa8005db4000 0000000000000003 0000000000000222 : processr!C1Idle+0x9 fffff800026758a1 : fffffa60017de180 fffffa6000000000 0000000cb8faa9e5 0000000000000000 : nt!PoIdle+0x183
fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiIdleLoop+0x21 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 0068000000000000 : 0xfffffa60 3: kd\> ~4 4: kd\> kb RetAddr : Args to Child : Call Site fffff800026a9f11 : 0000000000000000 0000000000000000 fffffa6000ee8510 fffffa8009751030 : nt!KxWaitForSpinLockAndAcquire+0x24
fffff80002a592c2 : 0000000000000000 fffffa600185b9f0 fffffa8000000001 fffffa600185b790 : nt!KeFreezeExecution+0x71 fffff800026c6db4 : fffffa600185b2a0 fffffa600185b970 fffffa6000ee8510 fffffa6000ec1301 : nt!KdEnterDebugger+0x72
fffff80002a59133 : fffffa600185b2a0 fffffa600185b9f0 fffffa600185b970 fffffa60005a2d40 : nt! ?? ::FNODOBFM::string’+0xe804
fffff800026aa6f2 : fffffa600185b8c8 fffffa600185b970 fffffa600185b970 fffffa600185b1b0 : nt!KdpTrap+0x2f fffff800026712a9 : fffffa600185b8c8 fffffa6000599180 fffffa600185b970 0000000000026160 : nt!KiDispatchException+0xae
fffff80002670970 : 0000000001cae679 0000000000000008 fffffa8004bd8b40 fffffa80042c05c0 : nt!KiExceptionDispatch+0xa9 fffff8000262d421 : fffffa6000599180 fffffa600185bb40 0000000000026160 fffffa60005a2d40 : nt!KiRaiseAssertion+0xb0
fffff8000266ae7f : 0000000000000000 fffffa600185bbc0 000003c4ef1a2809 fffffa600059ca00 : nt! ?? ::FNODOBFM::string’+0x2e75
fffffa60009eb552 : fffffa60009ea435 0000000cb8d0672b fffffa6000599180 fffffa600059c580 : nt!KiSecondaryClockInterrupt+0x11f fffffa60009ea435 : 0000000cb8d0672b fffffa6000599180 fffffa600059c580 0000000000000000 : processr!C1Halt+0x2
fffff80002675b83 : 0000000001cae600 0000000000000001 fffffa8004bd8b00 0000000000000fa4 : processr!C1Idle+0x9 fffff800026758a1 : fffffa6000599180 fffffa6000000000 0000000cb8faaa11 0000000000000000 : nt!PoIdle+0x183
fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiIdleLoop+0x21 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 0068000000000000 : 0xfffffa60 4: kd\> ~5 5: kd\> kb RetAddr : Args to Child : Call Site fffff800026a9f11 : 0000000000000000 0000000000000000 fffffa6000ee8510 fffffa80045d0a50 : nt!KxWaitForSpinLockAndAcquire+0x24
fffff80002a592c2 : 0000000000000000 fffffa60018ca9f0 fffffa8000000001 fffffa60018ca790 : nt!KeFreezeExecution+0x71 fffff800026c6db4 : fffffa60018ca2a0 fffffa60018ca970 fffffa6000ee8510 fffffa800716b740 : nt!KdEnterDebugger+0x72
fffff80002a59133 : fffffa60018ca2a0 fffffa60018ca9f0 fffffa60018ca970 fffffa60018acd40 : nt! ?? ::FNODOBFM::string’+0xe804
fffff800026aa6f2 : fffffa60018ca8c8 fffffa60018ca970 fffffa60018ca970 fffffa60018ca1b0 : nt!KdpTrap+0x2f fffff800026712a9 : fffffa60018ca8c8 fffffa60018a3180 fffffa60018ca970 0000000000026160 : nt!KiDispatchException+0xae
fffff80002670970 : fffffa8004bd8c70 fffffa80042c0400 fffffa8004bb1000 fffff800026763b4 : nt!KiExceptionDispatch+0xa9 fffff8000262d421 : fffffa60018a3180 fffffa60018cab40 0000000000026160 fffffa60018acd40 : nt!KiRaiseAssertion+0xb0
fffff8000266ae7f : 0000000000000000 fffffa60018cabc0 000003c4ef1a2537 fffffa60018a6a00 : nt! ?? ::FNODOBFM::string’+0x2e75
fffffa60009eb552 : fffffa60009ea435 0000000cb8d06741 fffffa60018a3180 fffffa60018a6580 : nt!KiSecondaryClockInterrupt+0x11f fffffa60009ea435 : 0000000cb8d06741 fffffa60018a3180 fffffa60018a6580 0000000000000000 : processr!C1Halt+0x2
fffff80002675b83 : 0000000001cae600 0000000000000001 fffffa8004bd8c00 00000000000053cf : processr!C1Idle+0x9 fffff800026758a1 : fffffa60018a3180 fffffa6000000000 0000000cb8faaa27 0000000000000000 : nt!PoIdle+0x183
fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiIdleLoop+0x21 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 0068000000000000 : 0xfffffa60 5: kd\> ~6 6: kd\> kb RetAddr : Args to Child : Call Site fffff80002a592c2 : 0000000000000000 fffffa60019399f0 fffffa8000000002 fffffa6001939790 : nt!KeFreezeExecution+0x65
fffff800026c6db4 : fffffa60019392a0 fffffa6001939970 fffffa6000ee8510 fffffa6000ec1301 : nt!KdEnterDebugger+0x72 fffff80002a59133 : fffffa60019392a0 fffffa60019399f0 fffffa6001939970 fffffa600191bd40 : nt! ?? ::FNODOBFM::string'+0xe804 fffff800026aa6f2 : fffffa60019398c8 fffffa6001939970 fffffa6001939970 fffffa60019391b0 : nt!KdpTrap+0x2f
fffff800026712a9 : fffffa60019398c8 fffffa6001912180 fffffa6001939970 0000000000026160 : nt!KiDispatchException+0xae fffff80002670970 : fffffa8004bd8da0 fffffa80042c0440 0000000000000001 0000000000000000 : nt!KiExceptionDispatch+0xa9
fffff8000262d421 : fffffa6001912180 fffffa6001939b40 0000000000026160 fffffa600191bd40 : nt!KiRaiseAssertion+0xb0 fffff8000266ae7f : 0000000000000000 fffffa6001939bc0 000003c4ef1a25c5 fffffa6001915a00 : nt! ?? ::FNODOBFM::string'+0x2e75 fffffa60009eb552 : fffffa60009ea435 0000000cb8d0676c 00000000a6de70e8 0000000000000006 : nt!KiSecondaryClockInterrupt+0x11f
fffffa60009ea435 : 0000000cb8d0676c 00000000a6de70e8 0000000000000006 fffffa6001912180 : processr!C1Halt+0x2 fffff80002675b83 : 0000000001cae679 0000000000000006 fffffa8004bd8da0 0000000000000000 : processr!C1Idle+0x9
fffff800026758a1 : fffffa6001912180 fffffa6000000000 0000000cb8faaa52 0000000000000000 : nt!PoIdle+0x183 fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiIdleLoop+0x21
00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 0068000000000000 : 0xfffffa60
6: kd> ~7
7: kd> kb
RetAddr : Args to Child : Call Site
fffff80002a592c2 : 0000000000000000 fffffa60019a89f0 fffffa8000000001 fffffa60019a8790 : nt!KeFreezeExecution+0x65 fffff800026c6db4 : fffffa60019a82a0 fffffa60019a8970 fffffa6000ee8510 fffffa800992b110 : nt!KdEnterDebugger+0x72
fffff80002a59133 : fffffa60019a82a0 fffffa60019a89f0 fffffa60019a8970 fffffa600198ad40 : nt! ?? ::FNODOBFM::string’+0xe804
fffff800026aa6f2 : fffffa60019a88c8 fffffa60019a8970 fffffa60019a8970 fffffa60019a81b0 : nt!KdpTrap+0x2f fffff800026712a9 : fffffa60019a88c8 fffffa6001981180 fffffa60019a8970 0000000000026160 : nt!KiDispatchException+0xae
fffff80002670970 : 0000000000000007 0000000000000001 0000000000000001 0000000000000000 : nt!KiExceptionDispatch+0xa9 fffff8000262d421 : fffffa6001981180 fffffa60019a8b40 0000000000026160 fffffa600198ad40 : nt!KiRaiseAssertion+0xb0
fffff8000266ae7f : 0000000000000000 fffffa60019a8bc0 000003c4ef1a2bd0 fffffa6001984a00 : nt! ?? ::FNODOBFM::string’+0x2e75
fffffa60009eb552 : fffffa60009ea435 0000000cb8d06756 0000000000000000 fffffa8004d94bf0 : nt!KiSecondaryClockInterrupt+0x11f fffffa60009ea435 : 0000000cb8d06756 0000000000000000 fffffa8004d94bf0 fffffa6001981180 : processr!C1Halt+0x2
fffff80002675b83 : fffffa8004d94c08 fffffa6034776478 0000000000000000 fffffa6001984580 : processr!C1Idle+0x9 fffff800026758a1 : fffffa6001981180 fffffa6000000000 0000000cb8faaa3c 0000000000000000 : nt!PoIdle+0x183
fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiIdleLoop+0x21 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 00680000`00000000 : 0xfffffa60

2

Processor zero is your issue, it’s raising an ASSERT because a DPC is taking
(or took) too long. Can’t tell any more information from the output
provided, you need to dig more into what DPC that is/was.

-scott

–
Scott Noone
Consulting Associate
OSR Open Systems Resources, Inc.
http://www.osronline.com

wrote in message news:xxxxx@ntdev…
> Problem: In non-debug environment system locks up, the only option is to
> reboot
>
> Detail: All I see the follwoing system assert and there is nothing related
> to my driver or any another driver in all the system CPU(s). Any help how
> to debug this further.
>
> Assertion failure - code c0000420 (first chance)
> 1: kd> kb
> RetAddr : Args to Child
> : Call Site
> fffff8000266ae7f : 0000000000000000 fffffa6001727bc0 000003c4ef1a22a5
> fffffa6001703a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d066ea 0000000000000001
> fffffa6001700180 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d066ea 0000000000000001 fffffa6001700180 <br>&gt; fffffa6001700180 : processr!C1Halt+0x2
> fffff80002675b83 : 0000000001cae679 000000000000000c fffffa60017007f0
> fffffa6001703580 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa6001700180 fffffa6000000000 0000000cb8faa9d0 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 1: kd&gt; ~0<br>&gt; 0: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff80002a592c2 : 0000000000000000 fffffa6001bc3990 0000000073504669 <br>&gt; fffffa6001bc3730 : nt!KeFreezeExecution+0x65
> fffff800026c6db4 : fffffa6001bc3240 fffffa6001bc3910 fffffa6000861110
> fffffa8007124aa0 : nt!KdEnterDebugger+0x72<br>&gt; fffff80002a59133 : fffffa6001bc3240 fffffa6001bc3990 fffffa6001bc3910 <br>&gt; fffffa800384f040 : nt! ?? ::FNODOBFM::string'+0xe804<br>&gt; fffff800026aa6f2 : fffffa6001bc3868 fffffa6001bc3910 fffffa6001bc3910 <br>&gt; fffffa80043243a0 : nt!KdpTrap+0x2f
> fffff800026712a9 : fffffa6001bc3868 fffff8000278a680 fffffa6001bc3910
> 0000000000026160 : nt!KiDispatchException+0xae<br>&gt; fffff80002670970 : 0000000000000000 0000000000000000 0000000000000046 <br>&gt; fffff8000266a5b1 : nt!KiExceptionDispatch+0xa9
> fffff8000262d421 : ffff0000062a3f86 0000000000000282 fffff8000278a680
> fffffa60078317b5 : nt!KiRaiseAssertion+0xb0<br>&gt; fffff8000266ad4a : fffff80002b5c460 fffffa6001bc3bc0 000003c4ef1a2c7e <br>&gt; fffff80002b5c460 : nt! ?? ::FNODOBFM::string'+0x2e75<br>&gt; fffff80002b39f04 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; fffff8000266a501 : nt!KeUpdateSystemTime+0xea
> fffff8000266a50d : fffffa80092313b8 fffffa8004326d00 fffffa8004326328
> fffffa8008fe5c08 : hal!HalpHpetClockInterrupt+0x8c<br>&gt; fffff8000263c6cc : fffffa80043243a0 fffffa80043243a0 fffffa80043243a0 <br>&gt; fffffa8004326328 : nt!KiInterruptDispatchNoLock+0x14d
> fffff8000287bf37 : fffffa60078327d0 fffffa8004326328 fffffa800384f040
> 91fa60c3cededa01 : nt!KiExecuteDpc+0xec<br>&gt; fffff800026ae616 : fffffa60017de180 fffffa800384f040 fffffa60017e7d40 <br>&gt; 0000000000000000 : nt!PspSystemThreadStartup+0x57
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiStartSystemThread+0x16<br>&gt; 0: kd&gt; ~2<br>&gt; 2: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff800026a9f11 : 0000000000000000 fffffa6002cbf6b2 0000000000000002 <br>&gt; fffffa80051f1628 : nt!KxWaitForSpinLockAndAcquire+0x27
> fffff80002a592c2 : 0000000000000000 fffffa60017969f0 0000000000000001
> fffffa6001796790 : nt!KeFreezeExecution+0x71<br>&gt; fffff800026c6db4 : fffffa60017962a0 fffffa6001796970 0000000000000000 <br>&gt; fffffa800716b860 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa60017962a0 fffffa60017969f0 fffffa6001796970
> fffffa6001778d40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa60017968c8 fffffa6001796970 fffffa6001796970
> fffffa6002c020d4 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa60017968c8 fffffa600176f180 fffffa6001796970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : fffffa8003d461b0 fffffa8004175b30 fffffa8005f0a000
> 00000000000001f8 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa600176f180 fffffa6001796b40 0000000000026160 <br>&gt; fffffa6001778d40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa6001796bc0 000003c4ef1a22e9
> fffffa6001772a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d06790 0000000000000000
> 0000000000000001 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d06790 0000000000000000 0000000000000001 <br>&gt; fffffa600176f180 : processr!C1Halt+0x2
> fffff80002675b83 : fffffa80051f0118 fffffa6001772580 fffffa8004bd88e0
> 0000000000000000 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa600176f180 fffffa6000000000 0000000cb8faaa76 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 2: kd&gt; ~3<br>&gt; 3: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff800026a9f11 : 0000000000000000 0000000000000003 0000000000000000 <br>&gt; 0000000000000000 : nt!KxWaitForSpinLockAndAcquire+0x24
> fffff80002a592c2 : 0000000000000000 fffffa60005fc9f0 fffffa800432a6f0
> fffffa60005fc790 : nt!KeFreezeExecution+0x71<br>&gt; fffff800026c6db4 : fffffa60005fc2a0 fffffa60005fc970 0000000000000000 <br>&gt; 0000000000000000 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa60005fc2a0 fffffa60005fc9f0 fffffa60005fc970
> fffffa60017e7d40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa60005fc8c8 fffffa60005fc970 fffffa60005fc970
> fffffa6002c020d4 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa60005fc8c8 fffffa60017de180 fffffa60005fc970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : fffffa8003d461b0 fffffa8004175b30 fffffa8005f0a000
> 00000000000001c0 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa60017de180 fffffa60005fcb40 0000000000026160 <br>&gt; fffffa60017e7d40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa60005fcbc0 000003c4ef1a2335
> fffffa60017e1a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d066ff 0000000000000000
> fffffa60017de180 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d066ff 0000000000000000 fffffa60017de180 <br>&gt; fffffa60017e1580 : processr!C1Halt+0x2
> fffff80002675b83 : 0000000000000000 fffffa8005db4000 0000000000000003
> 0000000000000222 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa60017de180 fffffa6000000000 0000000cb8faa9e5 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 3: kd&gt; ~4<br>&gt; 4: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff800026a9f11 : 0000000000000000 0000000000000000 fffffa6000ee8510 <br>&gt; fffffa8009751030 : nt!KxWaitForSpinLockAndAcquire+0x24
> fffff80002a592c2 : 0000000000000000 fffffa600185b9f0 fffffa8000000001
> fffffa600185b790 : nt!KeFreezeExecution+0x71<br>&gt; fffff800026c6db4 : fffffa600185b2a0 fffffa600185b970 fffffa6000ee8510 <br>&gt; fffffa6000ec1301 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa600185b2a0 fffffa600185b9f0 fffffa600185b970
> fffffa60005a2d40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa600185b8c8 fffffa600185b970 fffffa600185b970
> fffffa600185b1b0 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa600185b8c8 fffffa6000599180 fffffa600185b970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : 0000000001cae679 0000000000000008 fffffa8004bd8b40
> fffffa80042c05c0 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa6000599180 fffffa600185bb40 0000000000026160 <br>&gt; fffffa60005a2d40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa600185bbc0 000003c4ef1a2809
> fffffa600059ca00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d0672b fffffa6000599180
> fffffa600059c580 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d0672b fffffa6000599180 fffffa600059c580 <br>&gt; 0000000000000000 : processr!C1Halt+0x2
> fffff80002675b83 : 0000000001cae600 0000000000000001 fffffa8004bd8b00
> 0000000000000fa4 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa6000599180 fffffa6000000000 0000000cb8faaa11 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 4: kd&gt; ~5<br>&gt; 5: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff800026a9f11 : 0000000000000000 0000000000000000 fffffa6000ee8510 <br>&gt; fffffa80045d0a50 : nt!KxWaitForSpinLockAndAcquire+0x24
> fffff80002a592c2 : 0000000000000000 fffffa60018ca9f0 fffffa8000000001
> fffffa60018ca790 : nt!KeFreezeExecution+0x71<br>&gt; fffff800026c6db4 : fffffa60018ca2a0 fffffa60018ca970 fffffa6000ee8510 <br>&gt; fffffa800716b740 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa60018ca2a0 fffffa60018ca9f0 fffffa60018ca970
> fffffa60018acd40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa60018ca8c8 fffffa60018ca970 fffffa60018ca970
> fffffa60018ca1b0 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa60018ca8c8 fffffa60018a3180 fffffa60018ca970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : fffffa8004bd8c70 fffffa80042c0400 fffffa8004bb1000
> fffff800026763b4 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa60018a3180 fffffa60018cab40 0000000000026160 <br>&gt; fffffa60018acd40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa60018cabc0 000003c4ef1a2537
> fffffa60018a6a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d06741 fffffa60018a3180
> fffffa60018a6580 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d06741 fffffa60018a3180 fffffa60018a6580 <br>&gt; 0000000000000000 : processr!C1Halt+0x2
> fffff80002675b83 : 0000000001cae600 0000000000000001 fffffa8004bd8c00
> 00000000000053cf : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa60018a3180 fffffa6000000000 0000000cb8faaa27 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 5: kd&gt; ~6<br>&gt; 6: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff80002a592c2 : 0000000000000000 fffffa60019399f0 fffffa8000000002 <br>&gt; fffffa6001939790 : nt!KeFreezeExecution+0x65
> fffff800026c6db4 : fffffa60019392a0 fffffa6001939970 fffffa6000ee8510
> fffffa6000ec1301 : nt!KdEnterDebugger+0x72<br>&gt; fffff80002a59133 : fffffa60019392a0 fffffa60019399f0 fffffa6001939970 <br>&gt; fffffa600191bd40 : nt! ?? ::FNODOBFM::string'+0xe804<br>&gt; fffff800026aa6f2 : fffffa60019398c8 fffffa6001939970 fffffa6001939970 <br>&gt; fffffa60019391b0 : nt!KdpTrap+0x2f
> fffff800026712a9 : fffffa60019398c8 fffffa6001912180 fffffa6001939970
> 0000000000026160 : nt!KiDispatchException+0xae<br>&gt; fffff80002670970 : fffffa8004bd8da0 fffffa80042c0440 0000000000000001 <br>&gt; 0000000000000000 : nt!KiExceptionDispatch+0xa9
> fffff8000262d421 : fffffa6001912180 fffffa6001939b40 0000000000026160
> fffffa600191bd40 : nt!KiRaiseAssertion+0xb0<br>&gt; fffff8000266ae7f : 0000000000000000 fffffa6001939bc0 000003c4ef1a25c5 <br>&gt; fffffa6001915a00 : nt! ?? ::FNODOBFM::string'+0x2e75<br>&gt; fffffa60009eb552 : fffffa60009ea435 0000000cb8d0676c 00000000a6de70e8 <br>&gt; 0000000000000006 : nt!KiSecondaryClockInterrupt+0x11f
> fffffa60009ea435 : 0000000cb8d0676c 00000000a6de70e8 0000000000000006
> fffffa6001912180 : processr!C1Halt+0x2<br>&gt; fffff80002675b83 : 0000000001cae679 0000000000000006 fffffa8004bd8da0 <br>&gt; 0000000000000000 : processr!C1Idle+0x9
> fffff800026758a1 : fffffa6001912180 fffffa6000000000 0000000cb8faaa52
> 0000000000000000 : nt!PoIdle+0x183<br>&gt; fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!KiIdleLoop+0x21
> 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4<br>&gt; 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0068000000000000 : 0xfffffa60
> 6: kd> ~7
> 7: kd> kb
> RetAddr : Args to Child
> : Call Site
> fffff80002a592c2 : 0000000000000000 fffffa60019a89f0 fffffa8000000001
> fffffa60019a8790 : nt!KeFreezeExecution+0x65<br>&gt; fffff800026c6db4 : fffffa60019a82a0 fffffa60019a8970 fffffa6000ee8510 <br>&gt; fffffa800992b110 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa60019a82a0 fffffa60019a89f0 fffffa60019a8970
> fffffa600198ad40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa60019a88c8 fffffa60019a8970 fffffa60019a8970
> fffffa60019a81b0 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa60019a88c8 fffffa6001981180 fffffa60019a8970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : 0000000000000007 0000000000000001 0000000000000001
> 0000000000000000 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa6001981180 fffffa60019a8b40 0000000000026160 <br>&gt; fffffa600198ad40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa60019a8bc0 000003c4ef1a2bd0
> fffffa6001984a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d06756 0000000000000000
> fffffa8004d94bf0 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d06756 0000000000000000 fffffa8004d94bf0 <br>&gt; fffffa6001981180 : processr!C1Halt+0x2
> fffff80002675b83 : fffffa8004d94c08 fffffa6034776478 0000000000000000
> fffffa6001984580 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa6001981180 fffffa6000000000 0000000cb8faaa3c <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 00680000`00000000 : 0xfffffa60
>
>

3

+1

mm

4

Thanks Scott. I’ll dig more into this.

5

Attach WinDbg and enable Verifier, WDF verifier also if it’s a WDF driver.
Even though it’s a release build you can still set breakpoints in the
driver. If you step however, be prepared for some violent movements of the
cursor.

Gary G. Little
H (952) 223-1349
C (952) 454-4629
xxxxx@comcast.net

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of
xxxxx@yahoo.com
Sent: Thursday, April 29, 2010 1:50 PM
To: Windows System Software Devs Interest List
Subject: RE:[ntdev] I need help with system assert (c0000420) on debugger

Thanks Scott. I’ll dig more into this.

NTDEV is sponsored by OSR

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__________ Information from ESET Smart Security, version of virus signature
database 5073 (20100429) __________

The message was checked by ESET Smart Security.

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__________ Information from ESET Smart Security, version of virus signature
database 5073 (20100429) __________

The message was checked by ESET Smart Security.

http://www.eset.com

6

What happens if you issue “gn” in the debugger ? What OS is this on ?

//Daniel

wrote in message news:xxxxx@ntdev…
> Problem: In non-debug environment system locks up, the only option is to
> reboot
>
> Detail: All I see the follwoing system assert and there is nothing related
> to my driver or any another driver in all the system CPU(s). Any help how
> to debug this further.
>
> Assertion failure - code c0000420 (first chance)
> 1: kd> kb
> RetAddr : Args to Child
> : Call Site
> fffff8000266ae7f : 0000000000000000 fffffa6001727bc0 000003c4ef1a22a5
> fffffa6001703a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d066ea 0000000000000001
> fffffa6001700180 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d066ea 0000000000000001 fffffa6001700180 <br>&gt; fffffa6001700180 : processr!C1Halt+0x2
> fffff80002675b83 : 0000000001cae679 000000000000000c fffffa60017007f0
> fffffa6001703580 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa6001700180 fffffa6000000000 0000000cb8faa9d0 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 1: kd&gt; ~0<br>&gt; 0: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff80002a592c2 : 0000000000000000 fffffa6001bc3990 0000000073504669 <br>&gt; fffffa6001bc3730 : nt!KeFreezeExecution+0x65
> fffff800026c6db4 : fffffa6001bc3240 fffffa6001bc3910 fffffa6000861110
> fffffa8007124aa0 : nt!KdEnterDebugger+0x72<br>&gt; fffff80002a59133 : fffffa6001bc3240 fffffa6001bc3990 fffffa6001bc3910 <br>&gt; fffffa800384f040 : nt! ?? ::FNODOBFM::string'+0xe804<br>&gt; fffff800026aa6f2 : fffffa6001bc3868 fffffa6001bc3910 fffffa6001bc3910 <br>&gt; fffffa80043243a0 : nt!KdpTrap+0x2f
> fffff800026712a9 : fffffa6001bc3868 fffff8000278a680 fffffa6001bc3910
> 0000000000026160 : nt!KiDispatchException+0xae<br>&gt; fffff80002670970 : 0000000000000000 0000000000000000 0000000000000046 <br>&gt; fffff8000266a5b1 : nt!KiExceptionDispatch+0xa9
> fffff8000262d421 : ffff0000062a3f86 0000000000000282 fffff8000278a680
> fffffa60078317b5 : nt!KiRaiseAssertion+0xb0<br>&gt; fffff8000266ad4a : fffff80002b5c460 fffffa6001bc3bc0 000003c4ef1a2c7e <br>&gt; fffff80002b5c460 : nt! ?? ::FNODOBFM::string'+0x2e75<br>&gt; fffff80002b39f04 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; fffff8000266a501 : nt!KeUpdateSystemTime+0xea
> fffff8000266a50d : fffffa80092313b8 fffffa8004326d00 fffffa8004326328
> fffffa8008fe5c08 : hal!HalpHpetClockInterrupt+0x8c<br>&gt; fffff8000263c6cc : fffffa80043243a0 fffffa80043243a0 fffffa80043243a0 <br>&gt; fffffa8004326328 : nt!KiInterruptDispatchNoLock+0x14d
> fffff8000287bf37 : fffffa60078327d0 fffffa8004326328 fffffa800384f040
> 91fa60c3cededa01 : nt!KiExecuteDpc+0xec<br>&gt; fffff800026ae616 : fffffa60017de180 fffffa800384f040 fffffa60017e7d40 <br>&gt; 0000000000000000 : nt!PspSystemThreadStartup+0x57
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiStartSystemThread+0x16<br>&gt; 0: kd&gt; ~2<br>&gt; 2: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff800026a9f11 : 0000000000000000 fffffa6002cbf6b2 0000000000000002 <br>&gt; fffffa80051f1628 : nt!KxWaitForSpinLockAndAcquire+0x27
> fffff80002a592c2 : 0000000000000000 fffffa60017969f0 0000000000000001
> fffffa6001796790 : nt!KeFreezeExecution+0x71<br>&gt; fffff800026c6db4 : fffffa60017962a0 fffffa6001796970 0000000000000000 <br>&gt; fffffa800716b860 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa60017962a0 fffffa60017969f0 fffffa6001796970
> fffffa6001778d40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa60017968c8 fffffa6001796970 fffffa6001796970
> fffffa6002c020d4 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa60017968c8 fffffa600176f180 fffffa6001796970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : fffffa8003d461b0 fffffa8004175b30 fffffa8005f0a000
> 00000000000001f8 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa600176f180 fffffa6001796b40 0000000000026160 <br>&gt; fffffa6001778d40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa6001796bc0 000003c4ef1a22e9
> fffffa6001772a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d06790 0000000000000000
> 0000000000000001 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d06790 0000000000000000 0000000000000001 <br>&gt; fffffa600176f180 : processr!C1Halt+0x2
> fffff80002675b83 : fffffa80051f0118 fffffa6001772580 fffffa8004bd88e0
> 0000000000000000 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa600176f180 fffffa6000000000 0000000cb8faaa76 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 2: kd&gt; ~3<br>&gt; 3: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff800026a9f11 : 0000000000000000 0000000000000003 0000000000000000 <br>&gt; 0000000000000000 : nt!KxWaitForSpinLockAndAcquire+0x24
> fffff80002a592c2 : 0000000000000000 fffffa60005fc9f0 fffffa800432a6f0
> fffffa60005fc790 : nt!KeFreezeExecution+0x71<br>&gt; fffff800026c6db4 : fffffa60005fc2a0 fffffa60005fc970 0000000000000000 <br>&gt; 0000000000000000 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa60005fc2a0 fffffa60005fc9f0 fffffa60005fc970
> fffffa60017e7d40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa60005fc8c8 fffffa60005fc970 fffffa60005fc970
> fffffa6002c020d4 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa60005fc8c8 fffffa60017de180 fffffa60005fc970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : fffffa8003d461b0 fffffa8004175b30 fffffa8005f0a000
> 00000000000001c0 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa60017de180 fffffa60005fcb40 0000000000026160 <br>&gt; fffffa60017e7d40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa60005fcbc0 000003c4ef1a2335
> fffffa60017e1a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d066ff 0000000000000000
> fffffa60017de180 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d066ff 0000000000000000 fffffa60017de180 <br>&gt; fffffa60017e1580 : processr!C1Halt+0x2
> fffff80002675b83 : 0000000000000000 fffffa8005db4000 0000000000000003
> 0000000000000222 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa60017de180 fffffa6000000000 0000000cb8faa9e5 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 3: kd&gt; ~4<br>&gt; 4: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff800026a9f11 : 0000000000000000 0000000000000000 fffffa6000ee8510 <br>&gt; fffffa8009751030 : nt!KxWaitForSpinLockAndAcquire+0x24
> fffff80002a592c2 : 0000000000000000 fffffa600185b9f0 fffffa8000000001
> fffffa600185b790 : nt!KeFreezeExecution+0x71<br>&gt; fffff800026c6db4 : fffffa600185b2a0 fffffa600185b970 fffffa6000ee8510 <br>&gt; fffffa6000ec1301 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa600185b2a0 fffffa600185b9f0 fffffa600185b970
> fffffa60005a2d40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa600185b8c8 fffffa600185b970 fffffa600185b970
> fffffa600185b1b0 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa600185b8c8 fffffa6000599180 fffffa600185b970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : 0000000001cae679 0000000000000008 fffffa8004bd8b40
> fffffa80042c05c0 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa6000599180 fffffa600185bb40 0000000000026160 <br>&gt; fffffa60005a2d40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa600185bbc0 000003c4ef1a2809
> fffffa600059ca00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d0672b fffffa6000599180
> fffffa600059c580 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d0672b fffffa6000599180 fffffa600059c580 <br>&gt; 0000000000000000 : processr!C1Halt+0x2
> fffff80002675b83 : 0000000001cae600 0000000000000001 fffffa8004bd8b00
> 0000000000000fa4 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa6000599180 fffffa6000000000 0000000cb8faaa11 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 4: kd&gt; ~5<br>&gt; 5: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff800026a9f11 : 0000000000000000 0000000000000000 fffffa6000ee8510 <br>&gt; fffffa80045d0a50 : nt!KxWaitForSpinLockAndAcquire+0x24
> fffff80002a592c2 : 0000000000000000 fffffa60018ca9f0 fffffa8000000001
> fffffa60018ca790 : nt!KeFreezeExecution+0x71<br>&gt; fffff800026c6db4 : fffffa60018ca2a0 fffffa60018ca970 fffffa6000ee8510 <br>&gt; fffffa800716b740 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa60018ca2a0 fffffa60018ca9f0 fffffa60018ca970
> fffffa60018acd40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa60018ca8c8 fffffa60018ca970 fffffa60018ca970
> fffffa60018ca1b0 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa60018ca8c8 fffffa60018a3180 fffffa60018ca970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : fffffa8004bd8c70 fffffa80042c0400 fffffa8004bb1000
> fffff800026763b4 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa60018a3180 fffffa60018cab40 0000000000026160 <br>&gt; fffffa60018acd40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa60018cabc0 000003c4ef1a2537
> fffffa60018a6a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d06741 fffffa60018a3180
> fffffa60018a6580 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d06741 fffffa60018a3180 fffffa60018a6580 <br>&gt; 0000000000000000 : processr!C1Halt+0x2
> fffff80002675b83 : 0000000001cae600 0000000000000001 fffffa8004bd8c00
> 00000000000053cf : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa60018a3180 fffffa6000000000 0000000cb8faaa27 <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 0068000000000000 : 0xfffffa60<br>&gt; 5: kd&gt; ~6<br>&gt; 6: kd&gt; kb<br>&gt; RetAddr : Args to Child <br>&gt; : Call Site<br>&gt; fffff80002a592c2 : 0000000000000000 fffffa60019399f0 fffffa8000000002 <br>&gt; fffffa6001939790 : nt!KeFreezeExecution+0x65
> fffff800026c6db4 : fffffa60019392a0 fffffa6001939970 fffffa6000ee8510
> fffffa6000ec1301 : nt!KdEnterDebugger+0x72<br>&gt; fffff80002a59133 : fffffa60019392a0 fffffa60019399f0 fffffa6001939970 <br>&gt; fffffa600191bd40 : nt! ?? ::FNODOBFM::string'+0xe804<br>&gt; fffff800026aa6f2 : fffffa60019398c8 fffffa6001939970 fffffa6001939970 <br>&gt; fffffa60019391b0 : nt!KdpTrap+0x2f
> fffff800026712a9 : fffffa60019398c8 fffffa6001912180 fffffa6001939970
> 0000000000026160 : nt!KiDispatchException+0xae<br>&gt; fffff80002670970 : fffffa8004bd8da0 fffffa80042c0440 0000000000000001 <br>&gt; 0000000000000000 : nt!KiExceptionDispatch+0xa9
> fffff8000262d421 : fffffa6001912180 fffffa6001939b40 0000000000026160
> fffffa600191bd40 : nt!KiRaiseAssertion+0xb0<br>&gt; fffff8000266ae7f : 0000000000000000 fffffa6001939bc0 000003c4ef1a25c5 <br>&gt; fffffa6001915a00 : nt! ?? ::FNODOBFM::string'+0x2e75<br>&gt; fffffa60009eb552 : fffffa60009ea435 0000000cb8d0676c 00000000a6de70e8 <br>&gt; 0000000000000006 : nt!KiSecondaryClockInterrupt+0x11f
> fffffa60009ea435 : 0000000cb8d0676c 00000000a6de70e8 0000000000000006
> fffffa6001912180 : processr!C1Halt+0x2<br>&gt; fffff80002675b83 : 0000000001cae679 0000000000000006 fffffa8004bd8da0 <br>&gt; 0000000000000000 : processr!C1Idle+0x9
> fffff800026758a1 : fffffa6001912180 fffffa6000000000 0000000cb8faaa52
> 0000000000000000 : nt!PoIdle+0x183<br>&gt; fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!KiIdleLoop+0x21
> 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4<br>&gt; 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0068000000000000 : 0xfffffa60
> 6: kd> ~7
> 7: kd> kb
> RetAddr : Args to Child
> : Call Site
> fffff80002a592c2 : 0000000000000000 fffffa60019a89f0 fffffa8000000001
> fffffa60019a8790 : nt!KeFreezeExecution+0x65<br>&gt; fffff800026c6db4 : fffffa60019a82a0 fffffa60019a8970 fffffa6000ee8510 <br>&gt; fffffa800992b110 : nt!KdEnterDebugger+0x72
> fffff80002a59133 : fffffa60019a82a0 fffffa60019a89f0 fffffa60019a8970
> fffffa600198ad40 : nt! ?? ::FNODOBFM::string’+0xe804
> fffff800026aa6f2 : fffffa60019a88c8 fffffa60019a8970 fffffa60019a8970
> fffffa60019a81b0 : nt!KdpTrap+0x2f<br>&gt; fffff800026712a9 : fffffa60019a88c8 fffffa6001981180 fffffa60019a8970 <br>&gt; 0000000000026160 : nt!KiDispatchException+0xae
> fffff80002670970 : 0000000000000007 0000000000000001 0000000000000001
> 0000000000000000 : nt!KiExceptionDispatch+0xa9<br>&gt; fffff8000262d421 : fffffa6001981180 fffffa60019a8b40 0000000000026160 <br>&gt; fffffa600198ad40 : nt!KiRaiseAssertion+0xb0
> fffff8000266ae7f : 0000000000000000 fffffa60019a8bc0 000003c4ef1a2bd0
> fffffa6001984a00 : nt! ?? ::FNODOBFM::string’+0x2e75
> fffffa60009eb552 : fffffa60009ea435 0000000cb8d06756 0000000000000000
> fffffa8004d94bf0 : nt!KiSecondaryClockInterrupt+0x11f<br>&gt; fffffa60009ea435 : 0000000cb8d06756 0000000000000000 fffffa8004d94bf0 <br>&gt; fffffa6001981180 : processr!C1Halt+0x2
> fffff80002675b83 : fffffa8004d94c08 fffffa6034776478 0000000000000000
> fffffa6001984580 : processr!C1Idle+0x9<br>&gt; fffff800026758a1 : fffffa6001981180 fffffa6000000000 0000000cb8faaa3c <br>&gt; 0000000000000000 : nt!PoIdle+0x183
> fffff80002842860 : 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 : nt!KiIdleLoop+0x21<br>&gt; 00000000fffffa60 : 0000000000000000 0000000000000000 0000000000000000 <br>&gt; 0000000000000000 : nt!zzz_AsmCodeRange_End+0x4
> 0000000000000000 : 0000000000000000 0000000000000000 0000000000000000
> 00680000`00000000 : 0xfffffa60
>
>