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kernel crash in |open()| syscall codepath (|marshal_nfs41_open()|
Posted by Anonymous on Sat 20th Apr 2024 09:03
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view followups (newest first): kernel crash in |open()| syscall codepath (|marshal_nfs41_open()| by Anonymous

  1.  
  2. ************* Preparing the environment for Debugger Extensions Gallery repositories **************
  3.    ExtensionRepository : Implicit
  4.    UseExperimentalFeatureForNugetShare : true
  5.    AllowNugetExeUpdate : true
  6.    NonInteractiveNuget : true
  7.    AllowNugetMSCredentialProviderInstall : true
  8.    AllowParallelInitializationOfLocalRepositories : true
  9.  
  10.    EnableRedirectToV8JsProvider : false
  11.  
  12.    -- Configuring repositories
  13.       ----> Repository : LocalInstalled, Enabled: true
  14.       ----> Repository : UserExtensions, Enabled: true
  15.  
  16. >>>>>>>>>>>>> Preparing the environment for Debugger Extensions Gallery repositories completed, duration 0.000 seconds
  17.  
  18. ************* Waiting for Debugger Extensions Gallery to Initialize **************
  19.  
  20. >>>>>>>>>>>>> Waiting for Debugger Extensions Gallery to Initialize completed, duration 0.063 seconds
  21.    ----> Repository : UserExtensions, Enabled: true, Packages count: 0
  22.    ----> Repository : LocalInstalled, Enabled: true, Packages count: 41
  23.  
  24. Microsoft (R) Windows Debugger Version 10.0.27553.1004 AMD64
  25. Copyright (c) Microsoft Corporation. All rights reserved.
  26.  
  27.  
  28. Loading Dump File [C:\Windows\MEMORY.DMP]
  29. Kernel Bitmap Dump File: Full address space is available
  30.  
  31. Symbol search path is: srv*
  32. Executable search path is:
  33. Windows 10 Kernel Version 19041 MP (4 procs) Free x64
  34. Product: WinNt, suite: TerminalServer SingleUserTS
  35. Edition build lab: 19041.1.amd64fre.vb_release.191206-1406
  36. Kernel base = 0xfffff806`21800000 PsLoadedModuleList = 0xfffff806`2242a790
  37. Debug session time: Sat Apr 20 05:11:48.922 2024 (UTC + 2:00)
  38. System Uptime: 0 days 13:11:20.592
  39. Loading Kernel Symbols
  40. ...............................................................
  41. ................................................................
  42. ........................................
  43. Loading User Symbols
  44. ...................................
  45. Loading unloaded module list
  46. .......
  47. For analysis of this file, run !analyze -v
  48. Unable to load image \SystemRoot\system32\DRIVERS\nfs41_driver.sys, Win32 error 0n2
  49. nt!KeBugCheckEx:
  50. fffff806`21bfda40 48894c2408      mov     qword ptr [rsp+8],rcx ss:0018:ffffa185`3a59de00=0000000000000027
  51. 1: kd> !analyze -v
  52. *******************************************************************************
  53. *                                                                             *
  54. *                        Bugcheck Analysis                                    *
  55. *                                                                             *
  56. *******************************************************************************
  57.  
  58. RDR_FILE_SYSTEM (27)
  59.     If you see RxExceptionFilter on the stack then the 2nd and 3rd parameters are the
  60.     exception record and context record. Do a .cxr on the 3rd parameter and then kb to
  61.     obtain a more informative stack trace.
  62.     The high 16 bits of the first parameter is the RDBSS BugCheck code, which is defined
  63.     as follows:
  64.      RDBSS_BUG_CHECK_CACHESUP  = 0xca550000,
  65.      RDBSS_BUG_CHECK_CLEANUP   = 0xc1ee0000,
  66.      RDBSS_BUG_CHECK_CLOSE     = 0xc10e0000,
  67.      RDBSS_BUG_CHECK_NTEXCEPT  = 0xbaad0000,
  68. Arguments:
  69. Arg1: 00000000baad0080
  70. Arg2: ffffa1853a59ee68
  71. Arg3: ffffa1853a59e6a0
  72. Arg4: fffff80621b52c46
  73.  
  74. Debugging Details:
  75. ------------------
  76.  
  77.  
  78. KEY_VALUES_STRING: 1
  79.  
  80.     Key  : AV.Fault
  81.     Value: Read
  82.  
  83.     Key  : Analysis.CPU.mSec
  84.     Value: 4202
  85.  
  86.     Key  : Analysis.Elapsed.mSec
  87.     Value: 4255
  88.  
  89.     Key  : Analysis.IO.Other.Mb
  90.     Value: 1
  91.  
  92.     Key  : Analysis.IO.Read.Mb
  93.     Value: 0
  94.  
  95.     Key  : Analysis.IO.Write.Mb
  96.     Value: 25
  97.  
  98.     Key  : Analysis.Init.CPU.mSec
  99.     Value: 2062
  100.  
  101.     Key  : Analysis.Init.Elapsed.mSec
  102.     Value: 15000
  103.  
  104.     Key  : Analysis.Memory.CommitPeak.Mb
  105.     Value: 140
  106.  
  107.     Key  : Bugcheck.Code.KiBugCheckData
  108.     Value: 0x27
  109.  
  110.     Key  : Bugcheck.Code.LegacyAPI
  111.     Value: 0x27
  112.  
  113.     Key  : Bugcheck.Code.TargetModel
  114.     Value: 0x27
  115.  
  116.     Key  : Failure.Bucket
  117.     Value: 0x27_nfs41_driver!unknown_function
  118.  
  119.     Key  : Failure.Hash
  120.     Value: {4656e746-fab9-91b9-4b6f-31f7b00e7916}
  121.  
  122.     Key  : Hypervisor.Enlightenments.Value
  123.     Value: 0
  124.  
  125.     Key  : Hypervisor.Enlightenments.ValueHex
  126.     Value: 0
  127.  
  128.     Key  : Hypervisor.Flags.AnyHypervisorPresent
  129.     Value: 0
  130.  
  131.     Key  : Hypervisor.Flags.ApicEnlightened
  132.     Value: 0
  133.  
  134.     Key  : Hypervisor.Flags.ApicVirtualizationAvailable
  135.     Value: 0
  136.  
  137.     Key  : Hypervisor.Flags.AsyncMemoryHint
  138.     Value: 0
  139.  
  140.     Key  : Hypervisor.Flags.CoreSchedulerRequested
  141.     Value: 0
  142.  
  143.     Key  : Hypervisor.Flags.CpuManager
  144.     Value: 0
  145.  
  146.     Key  : Hypervisor.Flags.DeprecateAutoEoi
  147.     Value: 0
  148.  
  149.     Key  : Hypervisor.Flags.DynamicCpuDisabled
  150.     Value: 0
  151.  
  152.     Key  : Hypervisor.Flags.Epf
  153.     Value: 0
  154.  
  155.     Key  : Hypervisor.Flags.ExtendedProcessorMasks
  156.     Value: 0
  157.  
  158.     Key  : Hypervisor.Flags.HardwareMbecAvailable
  159.     Value: 0
  160.  
  161.     Key  : Hypervisor.Flags.MaxBankNumber
  162.     Value: 0
  163.  
  164.     Key  : Hypervisor.Flags.MemoryZeroingControl
  165.     Value: 0
  166.  
  167.     Key  : Hypervisor.Flags.NoExtendedRangeFlush
  168.     Value: 0
  169.  
  170.     Key  : Hypervisor.Flags.NoNonArchCoreSharing
  171.     Value: 0
  172.  
  173.     Key  : Hypervisor.Flags.Phase0InitDone
  174.     Value: 0
  175.  
  176.     Key  : Hypervisor.Flags.PowerSchedulerQos
  177.     Value: 0
  178.  
  179.     Key  : Hypervisor.Flags.RootScheduler
  180.     Value: 0
  181.  
  182.     Key  : Hypervisor.Flags.SynicAvailable
  183.     Value: 0
  184.  
  185.     Key  : Hypervisor.Flags.UseQpcBias
  186.     Value: 0
  187.  
  188.     Key  : Hypervisor.Flags.Value
  189.     Value: 0
  190.  
  191.     Key  : Hypervisor.Flags.ValueHex
  192.     Value: 0
  193.  
  194.     Key  : Hypervisor.Flags.VpAssistPage
  195.     Value: 0
  196.  
  197.     Key  : Hypervisor.Flags.VsmAvailable
  198.     Value: 0
  199.  
  200.     Key  : Hypervisor.RootFlags.AccessStats
  201.     Value: 0
  202.  
  203.     Key  : Hypervisor.RootFlags.CrashdumpEnlightened
  204.     Value: 0
  205.  
  206.     Key  : Hypervisor.RootFlags.CreateVirtualProcessor
  207.     Value: 0
  208.  
  209.     Key  : Hypervisor.RootFlags.DisableHyperthreading
  210.     Value: 0
  211.  
  212.     Key  : Hypervisor.RootFlags.HostTimelineSync
  213.     Value: 0
  214.  
  215.     Key  : Hypervisor.RootFlags.HypervisorDebuggingEnabled
  216.     Value: 0
  217.  
  218.     Key  : Hypervisor.RootFlags.IsHyperV
  219.     Value: 0
  220.  
  221.     Key  : Hypervisor.RootFlags.LivedumpEnlightened
  222.     Value: 0
  223.  
  224.     Key  : Hypervisor.RootFlags.MapDeviceInterrupt
  225.     Value: 0
  226.  
  227.     Key  : Hypervisor.RootFlags.MceEnlightened
  228.     Value: 0
  229.  
  230.     Key  : Hypervisor.RootFlags.Nested
  231.     Value: 0
  232.  
  233.     Key  : Hypervisor.RootFlags.StartLogicalProcessor
  234.     Value: 0
  235.  
  236.     Key  : Hypervisor.RootFlags.Value
  237.     Value: 0
  238.  
  239.     Key  : Hypervisor.RootFlags.ValueHex
  240.     Value: 0
  241.  
  242.     Key  : SecureKernel.HalpHvciEnabled
  243.     Value: 0
  244.  
  245.     Key  : WER.OS.Branch
  246.     Value: vb_release
  247.  
  248.     Key  : WER.OS.Version
  249.     Value: 10.0.19041.1
  250.  
  251.  
  252. BUGCHECK_CODE:  27
  253.  
  254. BUGCHECK_P1: baad0080
  255.  
  256. BUGCHECK_P2: ffffa1853a59ee68
  257.  
  258. BUGCHECK_P3: ffffa1853a59e6a0
  259.  
  260. BUGCHECK_P4: fffff80621b52c46
  261.  
  262. FILE_IN_CAB:  MEMORY.DMP
  263.  
  264. EXCEPTION_RECORD:  ffffa1853a59ee68 -- (.exr 0xffffa1853a59ee68)
  265. ExceptionAddress: fffff80621b52c46 (nt!CountUnicodeToUTF8+0x0000000000000032)
  266.    ExceptionCode: c0000005 (Access violation)
  267.   ExceptionFlags: 00000000
  268. NumberParameters: 2
  269.    Parameter[0]: 0000000000000000
  270.    Parameter[1]: 0000001400000000
  271. Attempt to read from address 0000001400000000
  272.  
  273. CONTEXT:  ffffa1853a59e6a0 -- (.cxr 0xffffa1853a59e6a0)
  274. rax=000000000000002e rbx=0000000000000000 rcx=0000000000000000
  275. rdx=000000000000002e rsi=ffffe00d8c4fa2b0 rdi=ffffa1853a59f120
  276. rip=fffff80621b52c46 rsp=ffffa1853a59f0a8 rbp=00000000000007ff
  277.  r8=ffffa1853a59f120  r9=0000001400000000 r10=0000000000000000
  278. r11=000000140000005c r12=ffffe00d8df81920 r13=ffffe00d8ac92200
  279. r14=ffffe00d8df817c0 r15=fffff80626417640
  280. iopl=0         nv up ei ng nz ac pe cy
  281. cs=0010  ss=0018  ds=002b  es=002b  fs=0053  gs=002b             efl=00050293
  282. nt!CountUnicodeToUTF8+0x32:
  283. fffff806`21b52c46 410fb701        movzx   eax,word ptr [r9] ds:002b:00000014`00000000=????
  284. Resetting default scope
  285.  
  286. BLACKBOXBSD: 1 (!blackboxbsd)
  287.  
  288.  
  289. BLACKBOXNTFS: 1 (!blackboxntfs)
  290.  
  291.  
  292. BLACKBOXPNP: 1 (!blackboxpnp)
  293.  
  294.  
  295. BLACKBOXWINLOGON: 1
  296.  
  297. PROCESS_NAME:  nfsd_debug.exe
  298.  
  299. READ_ADDRESS: unable to get nt!PspSessionIdBitmap
  300.  0000001400000000
  301.  
  302. ERROR_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%p verwies auf Arbeitsspeicher bei 0x%p. Der Vorgang %s konnte im Arbeitsspeicher nicht durchgef hrt werden.
  303.  
  304. EXCEPTION_CODE_STR:  c0000005
  305.  
  306. EXCEPTION_PARAMETER1:  0000000000000000
  307.  
  308. EXCEPTION_PARAMETER2:  0000001400000000
  309.  
  310. EXCEPTION_STR:  0xc0000005
  311.  
  312. STACK_TEXT:  
  313. ffffa185`3a59f0a8 fffff806`21f04ab7     : 00000000`00000000 ffffe00d`8df817c0 00000000`00000000 fffff806`263e6a5b : nt!CountUnicodeToUTF8+0x32
  314. ffffa185`3a59f0b0 fffff806`263e4f88     : ffffe00d`8c4fa2b0 ffffe00d`8df817c0 ffffe00d`8c4fa2b0 fffff806`21e297f0 : nt!RtlUnicodeToUTF8N+0x1a7
  315. ffffa185`3a59f0f0 fffff806`263e6ea6     : ffffcc04`a6679ac0 ffffe00d`8ca02000 00000000`00002000 ffffa185`3a59f278 : nfs41_driver+0x4f88
  316. ffffa185`3a59f140 fffff806`263e49d3     : ffffe00d`83902e60 ffffe00d`8ca02000 00000000`00002000 ffffa185`3a59f278 : nfs41_driver+0x6ea6
  317. ffffa185`3a59f1e0 fffff806`263f06c7     : ffffe00d`8c4fa2b0 ffffe00d`83902e60 ffffa185`3a59f278 ffffa185`3a599000 : nfs41_driver+0x49d3
  318. ffffa185`3a59f240 fffff806`263ea018     : ffffe00d`8c4fa2b0 00000000`00282018 00000004`00000004 00000000`00000000 : nfs41_driver+0x106c7
  319. ffffa185`3a59f2b0 fffff806`26417976     : ffffe00d`8c4fa2b0 ffffe00d`84737060 00000000`00000002 ffffe00d`8c4fa2b0 : nfs41_driver+0xa018
  320. ffffa185`3a59f330 fffff806`26417698     : ffffe00d`8c4fa2b0 ffffe00d`8c4fa2b0 ffffe00d`84737000 ffffe00d`8c4fa2b0 : nfs41_driver+0x37976
  321. ffffa185`3a59f360 fffff806`263f6092     : 00000000`00000000 ffffe00d`8df817c0 ffffe00d`84737001 00000000`00000000 : nfs41_driver+0x37698
  322. ffffa185`3a59f390 fffff806`2640e97d     : fffff806`26401370 ffffe00d`83802100 ffffffff`ffffffff ffffe00d`84737060 : nfs41_driver+0x16092
  323. ffffa185`3a59f490 fffff806`263eab67     : ffffe00d`8db8c340 00000000`00000002 01da9262`307fc929 fffff806`40d66536 : nfs41_driver+0x2e97d
  324. ffffa185`3a59f4c0 fffff806`21a2d935     : ffffe00d`84737060 ffffe00d`8df817c0 ffffe00d`8baa6730 fffff806`21a3d25b : nfs41_driver+0xab67
  325. ffffa185`3a59f500 fffff806`2566f248     : fffff806`25668000 00000000`00000000 ffffe00d`849ebc60 ffffe00d`8d70dea8 : nt!IofCallDriver+0x55
  326. ffffa185`3a59f540 fffff806`2566ed99     : ffffcc04`9d699140 00000000`00000000 fffff806`25668000 00000000`00000000 : mup!MupiCallUncProvider+0xb8
  327. ffffa185`3a59f5b0 fffff806`2566ecce     : ffffe00d`8df817c0 ffffe00d`8d70dea0 ffffe00d`8ac92250 00000000`00000000 : mup!MupStateMachine+0x59
  328. ffffa185`3a59f5e0 fffff806`21a2d935     : ffffe00d`8ac92250 00000000`00000000 ffffe00d`8db8c340 00000000`00000001 : mup!MupFsdIrpPassThrough+0x17e
  329. ffffa185`3a59f650 fffff806`1ea94a76     : 00000000`00282018 ffffa185`3a59f850 ffffe00d`84737060 fffff806`21e2f321 : nt!IofCallDriver+0x55
  330. ffffa185`3a59f690 fffff806`21a2d935     : 00000000`00000002 ffffe00d`8df819b0 ffffa185`20206f49 ffffa185`3a59f850 : FLTMGR!FltpDispatch+0xd6
  331. ffffa185`3a59f6f0 fffff806`21e2e30c     : 00000000`00000001 00000000`00282018 ffffe00d`8ac92250 ffffe00d`8b866080 : nt!IofCallDriver+0x55
  332. ffffa185`3a59f730 fffff806`21e2df5a     : 00000000`00282018 ffffa185`3a59fa80 00000000`00000000 00000000`00282018 : nt!IopSynchronousServiceTail+0x34c
  333. ffffa185`3a59f7d0 fffff806`21e2d236     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!IopXxxControlFile+0xd0a
  334. ffffa185`3a59f920 fffff806`21c119c5     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!NtDeviceIoControlFile+0x56
  335. ffffa185`3a59f990 00007ffc`0d44d0c4     : 00007ffc`0ad2358b 00000026`9d0fa790 00007ff7`af9f243b 00007ffb`b3c47ce0 : nt!KiSystemServiceCopyEnd+0x25
  336. 00000026`9d0fa738 00007ffc`0ad2358b     : 00000026`9d0fa790 00007ff7`af9f243b 00007ffb`b3c47ce0 00000026`00000000 : ntdll!NtDeviceIoControlFile+0x14
  337. 00000026`9d0fa740 00007ffc`0b8f5921     : 00000000`00282018 00000000`00000000 00000000`00000000 00000000`00000000 : KERNELBASE!DeviceIoControl+0x6b
  338. 00000026`9d0fa7b0 00007ff7`af9c5344     : 00000000`00000000 00000000`0000001f 00000026`9d0fa840 00000000`00000000 : KERNEL32!DeviceIoControlImplementation+0x81
  339. 00000026`9d0fa800 00007ff7`af9c522b     : 00007ff7`afa14010 00000000`00000000 00000000`00000000 00000000`00000000 : nfsd_debug!nfsd_worker_thread_main+0xe4 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\daemon\nfs41_daemon.c @ 113]
  340. 00000026`9d0ffb70 00007ffb`b3af2d20     : 00007ff7`afa14010 00000000`00000000 00000000`00000000 00000000`00000000 : nfsd_debug!nfsd_thread_main+0x2b [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\daemon\nfs41_daemon.c @ 172]
  341. 00000026`9d0ffbf0 00000000`00000000     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ucrtbased!thread_start<unsigned int (__cdecl*)(void *),1>+0xb0 [minkernel\crts\ucrt\src\appcrt\startup\thread.cpp @ 97]
  342.  
  343.  
  344. SYMBOL_NAME:  nfs41_driver+4f88
  345.  
  346. MODULE_NAME: nfs41_driver
  347.  
  348. IMAGE_NAME:  nfs41_driver.sys
  349.  
  350. STACK_COMMAND:  .cxr 0xffffa1853a59e6a0 ; kb
  351.  
  352. BUCKET_ID_FUNC_OFFSET:  4f88
  353.  
  354. FAILURE_BUCKET_ID:  0x27_nfs41_driver!unknown_function
  355.  
  356. OS_VERSION:  10.0.19041.1
  357.  
  358. BUILDLAB_STR:  vb_release
  359.  
  360. OSPLATFORM_TYPE:  x64
  361.  
  362. OSNAME:  Windows 10
  363.  
  364. FAILURE_ID_HASH:  {4656e746-fab9-91b9-4b6f-31f7b00e7916}
  365.  
  366. Followup:     MachineOwner
  367. ---------
  368.  
  369.  
  370. ************* Path validation summary **************
  371. Response                         Time (ms)     Location
  372. Deferred                                       srv*
  373. OK                                             C:\cygwin64\lib\msnfs41client
  374. 1: kd> .lines -e
  375. Line number information will be loaded
  376. 1: kd> !analyze -v
  377. *******************************************************************************
  378. *                                                                             *
  379. *                        Bugcheck Analysis                                    *
  380. *                                                                             *
  381. *******************************************************************************
  382.  
  383. RDR_FILE_SYSTEM (27)
  384.     If you see RxExceptionFilter on the stack then the 2nd and 3rd parameters are the
  385.     exception record and context record. Do a .cxr on the 3rd parameter and then kb to
  386.     obtain a more informative stack trace.
  387.     The high 16 bits of the first parameter is the RDBSS BugCheck code, which is defined
  388.     as follows:
  389.      RDBSS_BUG_CHECK_CACHESUP  = 0xca550000,
  390.      RDBSS_BUG_CHECK_CLEANUP   = 0xc1ee0000,
  391.      RDBSS_BUG_CHECK_CLOSE     = 0xc10e0000,
  392.      RDBSS_BUG_CHECK_NTEXCEPT  = 0xbaad0000,
  393. Arguments:
  394. Arg1: 00000000baad0080
  395. Arg2: ffffa1853a59ee68
  396. Arg3: ffffa1853a59e6a0
  397. Arg4: fffff80621b52c46
  398.  
  399. Debugging Details:
  400. ------------------
  401.  
  402.  
  403. KEY_VALUES_STRING: 1
  404.  
  405.     Key  : AV.Fault
  406.     Value: Read
  407.  
  408.     Key  : Analysis.CPU.mSec
  409.     Value: 3624
  410.  
  411.     Key  : Analysis.Elapsed.mSec
  412.     Value: 3627
  413.  
  414.     Key  : Analysis.IO.Other.Mb
  415.     Value: 1
  416.  
  417.     Key  : Analysis.IO.Read.Mb
  418.     Value: 2
  419.  
  420.     Key  : Analysis.IO.Write.Mb
  421.     Value: 27
  422.  
  423.     Key  : Analysis.Init.CPU.mSec
  424.     Value: 9687
  425.  
  426.     Key  : Analysis.Init.Elapsed.mSec
  427.     Value: 261833
  428.  
  429.     Key  : Analysis.Memory.CommitPeak.Mb
  430.     Value: 148
  431.  
  432.     Key  : Bugcheck.Code.KiBugCheckData
  433.     Value: 0x27
  434.  
  435.     Key  : Bugcheck.Code.LegacyAPI
  436.     Value: 0x27
  437.  
  438.     Key  : Bugcheck.Code.TargetModel
  439.     Value: 0x27
  440.  
  441.     Key  : Failure.Bucket
  442.     Value: 0x27_nfs41_driver!length_as_utf8
  443.  
  444.     Key  : Failure.Hash
  445.     Value: {a57fa22e-8926-234c-4e0e-1cefe23c0547}
  446.  
  447.     Key  : Hypervisor.Enlightenments.Value
  448.     Value: 0
  449.  
  450.     Key  : Hypervisor.Enlightenments.ValueHex
  451.     Value: 0
  452.  
  453.     Key  : Hypervisor.Flags.AnyHypervisorPresent
  454.     Value: 0
  455.  
  456.     Key  : Hypervisor.Flags.ApicEnlightened
  457.     Value: 0
  458.  
  459.     Key  : Hypervisor.Flags.ApicVirtualizationAvailable
  460.     Value: 0
  461.  
  462.     Key  : Hypervisor.Flags.AsyncMemoryHint
  463.     Value: 0
  464.  
  465.     Key  : Hypervisor.Flags.CoreSchedulerRequested
  466.     Value: 0
  467.  
  468.     Key  : Hypervisor.Flags.CpuManager
  469.     Value: 0
  470.  
  471.     Key  : Hypervisor.Flags.DeprecateAutoEoi
  472.     Value: 0
  473.  
  474.     Key  : Hypervisor.Flags.DynamicCpuDisabled
  475.     Value: 0
  476.  
  477.     Key  : Hypervisor.Flags.Epf
  478.     Value: 0
  479.  
  480.     Key  : Hypervisor.Flags.ExtendedProcessorMasks
  481.     Value: 0
  482.  
  483.     Key  : Hypervisor.Flags.HardwareMbecAvailable
  484.     Value: 0
  485.  
  486.     Key  : Hypervisor.Flags.MaxBankNumber
  487.     Value: 0
  488.  
  489.     Key  : Hypervisor.Flags.MemoryZeroingControl
  490.     Value: 0
  491.  
  492.     Key  : Hypervisor.Flags.NoExtendedRangeFlush
  493.     Value: 0
  494.  
  495.     Key  : Hypervisor.Flags.NoNonArchCoreSharing
  496.     Value: 0
  497.  
  498.     Key  : Hypervisor.Flags.Phase0InitDone
  499.     Value: 0
  500.  
  501.     Key  : Hypervisor.Flags.PowerSchedulerQos
  502.     Value: 0
  503.  
  504.     Key  : Hypervisor.Flags.RootScheduler
  505.     Value: 0
  506.  
  507.     Key  : Hypervisor.Flags.SynicAvailable
  508.     Value: 0
  509.  
  510.     Key  : Hypervisor.Flags.UseQpcBias
  511.     Value: 0
  512.  
  513.     Key  : Hypervisor.Flags.Value
  514.     Value: 0
  515.  
  516.     Key  : Hypervisor.Flags.ValueHex
  517.     Value: 0
  518.  
  519.     Key  : Hypervisor.Flags.VpAssistPage
  520.     Value: 0
  521.  
  522.     Key  : Hypervisor.Flags.VsmAvailable
  523.     Value: 0
  524.  
  525.     Key  : Hypervisor.RootFlags.AccessStats
  526.     Value: 0
  527.  
  528.     Key  : Hypervisor.RootFlags.CrashdumpEnlightened
  529.     Value: 0
  530.  
  531.     Key  : Hypervisor.RootFlags.CreateVirtualProcessor
  532.     Value: 0
  533.  
  534.     Key  : Hypervisor.RootFlags.DisableHyperthreading
  535.     Value: 0
  536.  
  537.     Key  : Hypervisor.RootFlags.HostTimelineSync
  538.     Value: 0
  539.  
  540.     Key  : Hypervisor.RootFlags.HypervisorDebuggingEnabled
  541.     Value: 0
  542.  
  543.     Key  : Hypervisor.RootFlags.IsHyperV
  544.     Value: 0
  545.  
  546.     Key  : Hypervisor.RootFlags.LivedumpEnlightened
  547.     Value: 0
  548.  
  549.     Key  : Hypervisor.RootFlags.MapDeviceInterrupt
  550.     Value: 0
  551.  
  552.     Key  : Hypervisor.RootFlags.MceEnlightened
  553.     Value: 0
  554.  
  555.     Key  : Hypervisor.RootFlags.Nested
  556.     Value: 0
  557.  
  558.     Key  : Hypervisor.RootFlags.StartLogicalProcessor
  559.     Value: 0
  560.  
  561.     Key  : Hypervisor.RootFlags.Value
  562.     Value: 0
  563.  
  564.     Key  : Hypervisor.RootFlags.ValueHex
  565.     Value: 0
  566.  
  567.     Key  : SecureKernel.HalpHvciEnabled
  568.     Value: 0
  569.  
  570.     Key  : WER.OS.Branch
  571.     Value: vb_release
  572.  
  573.     Key  : WER.OS.Version
  574.     Value: 10.0.19041.1
  575.  
  576.  
  577. BUGCHECK_CODE:  27
  578.  
  579. BUGCHECK_P1: baad0080
  580.  
  581. BUGCHECK_P2: ffffa1853a59ee68
  582.  
  583. BUGCHECK_P3: ffffa1853a59e6a0
  584.  
  585. BUGCHECK_P4: fffff80621b52c46
  586.  
  587. FILE_IN_CAB:  MEMORY.DMP
  588.  
  589. EXCEPTION_RECORD:  ffffa1853a59ee68 -- (.exr 0xffffa1853a59ee68)
  590. ExceptionAddress: fffff80621b52c46 (nt!CountUnicodeToUTF8+0x0000000000000032)
  591.    ExceptionCode: c0000005 (Access violation)
  592.   ExceptionFlags: 00000000
  593. NumberParameters: 2
  594.    Parameter[0]: 0000000000000000
  595.    Parameter[1]: 0000001400000000
  596. Attempt to read from address 0000001400000000
  597.  
  598. CONTEXT:  ffffa1853a59e6a0 -- (.cxr 0xffffa1853a59e6a0)
  599. rax=000000000000002e rbx=0000000000000000 rcx=0000000000000000
  600. rdx=000000000000002e rsi=ffffe00d8c4fa2b0 rdi=ffffa1853a59f120
  601. rip=fffff80621b52c46 rsp=ffffa1853a59f0a8 rbp=00000000000007ff
  602.  r8=ffffa1853a59f120  r9=0000001400000000 r10=0000000000000000
  603. r11=000000140000005c r12=ffffe00d8df81920 r13=ffffe00d8ac92200
  604. r14=ffffe00d8df817c0 r15=fffff80626417640
  605. iopl=0         nv up ei ng nz ac pe cy
  606. cs=0010  ss=0018  ds=002b  es=002b  fs=0053  gs=002b             efl=00050293
  607. nt!CountUnicodeToUTF8+0x32:
  608. fffff806`21b52c46 410fb701        movzx   eax,word ptr [r9] ds:002b:00000014`00000000=????
  609. Resetting default scope
  610.  
  611. BLACKBOXBSD: 1 (!blackboxbsd)
  612.  
  613.  
  614. BLACKBOXNTFS: 1 (!blackboxntfs)
  615.  
  616.  
  617. BLACKBOXPNP: 1 (!blackboxpnp)
  618.  
  619.  
  620. BLACKBOXWINLOGON: 1
  621.  
  622. PROCESS_NAME:  nfsd_debug.exe
  623.  
  624. READ_ADDRESS:  0000001400000000
  625.  
  626. ERROR_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%p verwies auf Arbeitsspeicher bei 0x%p. Der Vorgang %s konnte im Arbeitsspeicher nicht durchgef hrt werden.
  627.  
  628. EXCEPTION_CODE_STR:  c0000005
  629.  
  630. EXCEPTION_PARAMETER1:  0000000000000000
  631.  
  632. EXCEPTION_PARAMETER2:  0000001400000000
  633.  
  634. EXCEPTION_STR:  0xc0000005
  635.  
  636. STACK_TEXT:  
  637. ffffa185`3a59f0a8 fffff806`21f04ab7     : 00000000`00000000 ffffe00d`8df817c0 00000000`00000000 fffff806`263e6a5b : nt!CountUnicodeToUTF8+0x32
  638. ffffa185`3a59f0b0 fffff806`263e4f88     : ffffe00d`8c4fa2b0 ffffe00d`8df817c0 ffffe00d`8c4fa2b0 fffff806`21e297f0 : nt!RtlUnicodeToUTF8N+0x1a7
  639. ffffa185`3a59f0f0 fffff806`263e6ea6     : ffffcc04`a6679ac0 ffffe00d`8ca02000 00000000`00002000 ffffa185`3a59f278 : nfs41_driver!length_as_utf8+0x38 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 529]
  640. ffffa185`3a59f140 fffff806`263e49d3     : ffffe00d`83902e60 ffffe00d`8ca02000 00000000`00002000 ffffa185`3a59f278 : nfs41_driver!marshal_nfs41_open+0xa6 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 708]
  641. ffffa185`3a59f1e0 fffff806`263f06c7     : ffffe00d`8c4fa2b0 ffffe00d`83902e60 ffffa185`3a59f278 ffffa185`3a599000 : nfs41_driver!handle_upcall+0x163 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 1444]
  642. ffffa185`3a59f240 fffff806`263ea018     : ffffe00d`8c4fa2b0 00000000`00282018 00000004`00000004 00000000`00000000 : nfs41_driver!nfs41_upcall+0xe7 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 1637]
  643. ffffa185`3a59f2b0 fffff806`26417976     : ffffe00d`8c4fa2b0 ffffe00d`84737060 00000000`00000002 ffffe00d`8c4fa2b0 : nfs41_driver!nfs41_DevFcbXXXControlFile+0x128 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 2477]
  644. ffffa185`3a59f330 fffff806`26417698     : ffffe00d`8c4fa2b0 ffffe00d`8c4fa2b0 ffffe00d`84737000 ffffe00d`8c4fa2b0 : nfs41_driver!RxXXXControlFileCallthru+0x76 [base\fs\rdr2\rdbss\ntdevfcb.c @ 130]
  645. ffffa185`3a59f360 fffff806`263f6092     : 00000000`00000000 ffffe00d`8df817c0 ffffe00d`84737001 00000000`00000000 : nfs41_driver!RxCommonDevFCBIoCtl+0x58 [base\fs\rdr2\rdbss\ntdevfcb.c @ 491]
  646. ffffa185`3a59f390 fffff806`2640e97d     : fffff806`26401370 ffffe00d`83802100 ffffffff`ffffffff ffffe00d`84737060 : nfs41_driver!RxFsdCommonDispatch+0x442 [base\fs\rdr2\rdbss\ntfsd.c @ 848]
  647. ffffa185`3a59f490 fffff806`263eab67     : ffffe00d`8db8c340 00000000`00000002 01da9262`307fc929 fffff806`40d66536 : nfs41_driver!RxFsdDispatch+0xfd [base\fs\rdr2\rdbss\ntfsd.c @ 442]
  648. ffffa185`3a59f4c0 fffff806`21a2d935     : ffffe00d`84737060 ffffe00d`8df817c0 ffffe00d`8baa6730 fffff806`21a3d25b : nfs41_driver!nfs41_FsdDispatch+0x67 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 6922]
  649. ffffa185`3a59f500 fffff806`2566f248     : fffff806`25668000 00000000`00000000 ffffe00d`849ebc60 ffffe00d`8d70dea8 : nt!IofCallDriver+0x55
  650. ffffa185`3a59f540 fffff806`2566ed99     : ffffcc04`9d699140 00000000`00000000 fffff806`25668000 00000000`00000000 : mup!MupiCallUncProvider+0xb8
  651. ffffa185`3a59f5b0 fffff806`2566ecce     : ffffe00d`8df817c0 ffffe00d`8d70dea0 ffffe00d`8ac92250 00000000`00000000 : mup!MupStateMachine+0x59
  652. ffffa185`3a59f5e0 fffff806`21a2d935     : ffffe00d`8ac92250 00000000`00000000 ffffe00d`8db8c340 00000000`00000001 : mup!MupFsdIrpPassThrough+0x17e
  653. ffffa185`3a59f650 fffff806`1ea94a76     : 00000000`00282018 ffffa185`3a59f850 ffffe00d`84737060 fffff806`21e2f321 : nt!IofCallDriver+0x55
  654. ffffa185`3a59f690 fffff806`21a2d935     : 00000000`00000002 ffffe00d`8df819b0 ffffa185`20206f49 ffffa185`3a59f850 : FLTMGR!FltpDispatch+0xd6
  655. ffffa185`3a59f6f0 fffff806`21e2e30c     : 00000000`00000001 00000000`00282018 ffffe00d`8ac92250 ffffe00d`8b866080 : nt!IofCallDriver+0x55
  656. ffffa185`3a59f730 fffff806`21e2df5a     : 00000000`00282018 ffffa185`3a59fa80 00000000`00000000 00000000`00282018 : nt!IopSynchronousServiceTail+0x34c
  657. ffffa185`3a59f7d0 fffff806`21e2d236     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!IopXxxControlFile+0xd0a
  658. ffffa185`3a59f920 fffff806`21c119c5     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!NtDeviceIoControlFile+0x56
  659. ffffa185`3a59f990 00007ffc`0d44d0c4     : 00007ffc`0ad2358b 00000026`9d0fa790 00007ff7`af9f243b 00007ffb`b3c47ce0 : nt!KiSystemServiceCopyEnd+0x25
  660. 00000026`9d0fa738 00007ffc`0ad2358b     : 00000026`9d0fa790 00007ff7`af9f243b 00007ffb`b3c47ce0 00000026`00000000 : ntdll!NtDeviceIoControlFile+0x14
  661. 00000026`9d0fa740 00007ffc`0b8f5921     : 00000000`00282018 00000000`00000000 00000000`00000000 00000000`00000000 : KERNELBASE!DeviceIoControl+0x6b
  662. 00000026`9d0fa7b0 00007ff7`af9c5344     : 00000000`00000000 00000000`0000001f 00000026`9d0fa840 00000000`00000000 : KERNEL32!DeviceIoControlImplementation+0x81
  663. 00000026`9d0fa800 00007ff7`af9c522b     : 00007ff7`afa14010 00000000`00000000 00000000`00000000 00000000`00000000 : nfsd_debug!nfsd_worker_thread_main+0xe4 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\daemon\nfs41_daemon.c @ 113]
  664. 00000026`9d0ffb70 00007ffb`b3af2d20     : 00007ff7`afa14010 00000000`00000000 00000000`00000000 00000000`00000000 : nfsd_debug!nfsd_thread_main+0x2b [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\daemon\nfs41_daemon.c @ 172]
  665. 00000026`9d0ffbf0 00000000`00000000     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ucrtbased!thread_start<unsigned int (__cdecl*)(void *),1>+0xb0 [minkernel\crts\ucrt\src\appcrt\startup\thread.cpp @ 97]
  666.  
  667.  
  668. FAULTING_SOURCE_LINE:  C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c
  669.  
  670. FAULTING_SOURCE_FILE:  C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c
  671.  
  672. FAULTING_SOURCE_LINE_NUMBER:  529
  673.  
  674. SYMBOL_NAME:  nfs41_driver!length_as_utf8+38
  675.  
  676. MODULE_NAME: nfs41_driver
  677.  
  678. IMAGE_NAME:  nfs41_driver.sys
  679.  
  680. STACK_COMMAND:  .cxr 0xffffa1853a59e6a0 ; kb
  681.  
  682. BUCKET_ID_FUNC_OFFSET:  38
  683.  
  684. FAILURE_BUCKET_ID:  0x27_nfs41_driver!length_as_utf8
  685.  
  686. OS_VERSION:  10.0.19041.1
  687.  
  688. BUILDLAB_STR:  vb_release
  689.  
  690. OSPLATFORM_TYPE:  x64
  691.  
  692. OSNAME:  Windows 10
  693.  
  694. FAILURE_ID_HASH:  {a57fa22e-8926-234c-4e0e-1cefe23c0547}
  695.  
  696. Followup:     MachineOwner
  697. ---------
  698.  
  699. 1: kd> kp
  700.  # Child-SP          RetAddr               Call Site
  701. 00 ffffa185`3a59ddf8 fffff806`263f7809     nt!KeBugCheckEx
  702. 01 ffffa185`3a59de00 fffff806`263f8fe0     nfs41_driver!RxExceptionFilter(struct _RX_CONTEXT * RxContext = 0xffffe00d`8c4fa2b0, struct _EXCEPTION_POINTERS * ExceptionPointer = 0xffffa185`3a59dee0)+0x159 [base\fs\rdr2\rdbss\ntexcept.c @ 126]
  703. 02 ffffa185`3a59de70 fffff806`21bd058f     nfs41_driver!RxFsdCommonDispatch$filt$0+0x15 [base\fs\rdr2\rdbss\ntfsd.c @ 876]
  704. 03 ffffa185`3a59deb0 fffff806`21c0856f     nt!_C_specific_handler+0x9f
  705. 04 ffffa185`3a59df20 fffff806`21aaab47     nt!RtlpExecuteHandlerForException+0xf
  706. 05 ffffa185`3a59df50 fffff806`21aa8a76     nt!RtlDispatchException+0x297
  707. 06 ffffa185`3a59e670 fffff806`21c123ac     nt!KiDispatchException+0x186
  708. 07 ffffa185`3a59ed30 fffff806`21c0dc0e     nt!KiExceptionDispatch+0x12c
  709. 08 ffffa185`3a59ef10 fffff806`21b52c46     nt!KiPageFault+0x44e
  710. 09 ffffa185`3a59f0a8 fffff806`21f04ab7     nt!CountUnicodeToUTF8+0x32
  711. 0a ffffa185`3a59f0b0 fffff806`263e4f88     nt!RtlUnicodeToUTF8N+0x1a7
  712. 0b ffffa185`3a59f0f0 fffff806`263e6ea6     nfs41_driver!length_as_utf8(struct _UNICODE_STRING * str = 0xffffcc04`a6679ac0 "--- memory read error at address 0x00000014`00000000 ---")+0x38 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 529]
  713. 0c ffffa185`3a59f140 fffff806`263e49d3     nfs41_driver!marshal_nfs41_open(struct _updowncall_entry * entry = 0xffffe00d`83902e60, unsigned char * buf = 0xffffe00d`8ca02000 "H???", unsigned long buf_len = 0x2000, unsigned long * len = 0xffffa185`3a59f278)+0xa6 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 708]
  714. 0d ffffa185`3a59f1e0 fffff806`263f06c7     nfs41_driver!handle_upcall(struct _RX_CONTEXT * RxContext = 0xffffe00d`8c4fa2b0, struct _updowncall_entry * entry = 0xffffe00d`83902e60, unsigned long * len = 0xffffa185`3a59f278)+0x163 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 1444]
  715. 0e ffffa185`3a59f240 fffff806`263ea018     nfs41_driver!nfs41_upcall(struct _RX_CONTEXT * RxContext = 0xffffe00d`8c4fa2b0)+0xe7 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 1637]
  716. 0f ffffa185`3a59f2b0 fffff806`26417976     nfs41_driver!nfs41_DevFcbXXXControlFile(struct _RX_CONTEXT * RxContext = 0xffffe00d`8c4fa2b0)+0x128 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 2477]
  717. 10 ffffa185`3a59f330 fffff806`26417698     nfs41_driver!RxXXXControlFileCallthru(struct _RX_CONTEXT * RxContext = 0xffffe00d`8c4fa2b0, struct _IRP * Irp = 0xffffe00d`8df817c0)+0x76 [base\fs\rdr2\rdbss\ntdevfcb.c @ 130]
  718. 11 ffffa185`3a59f360 fffff806`263f6092     nfs41_driver!RxCommonDevFCBIoCtl(struct _RX_CONTEXT * RxContext = 0xffffe00d`8c4fa2b0, struct _IRP * Irp = <Value unavailable error>)+0x58 [base\fs\rdr2\rdbss\ntdevfcb.c @ 491]
  719. 12 ffffa185`3a59f390 fffff806`2640e97d     nfs41_driver!RxFsdCommonDispatch(struct _RX_FSD_DISPATCH_VECTOR * DispatchVector = 0xfffff806`26401370, struct _IRP * Irp = 0xffffe00d`8df817c0, struct _FILE_OBJECT * FileObject = 0xffffffff`ffffffff, struct _RDBSS_DEVICE_OBJECT * RxDeviceObject = 0xffffe00d`84737060)+0x442 [base\fs\rdr2\rdbss\ntfsd.c @ 848]
  720. 13 ffffa185`3a59f490 fffff806`263eab67     nfs41_driver!RxFsdDispatch(struct _RDBSS_DEVICE_OBJECT * RxDeviceObject = <Value unavailable error>, struct _IRP * Irp = <Value unavailable error>)+0xfd [base\fs\rdr2\rdbss\ntfsd.c @ 442]
  721. 14 ffffa185`3a59f4c0 fffff806`21a2d935     nfs41_driver!nfs41_FsdDispatch(struct _DEVICE_OBJECT * dev = 0xffffe00d`84737060 Device for "\FileSystem\nfs41_driver", struct _IRP * Irp = 0xffffe00d`8df817c0)+0x67 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 6922]
  722. 15 ffffa185`3a59f500 fffff806`2566f248     nt!IofCallDriver+0x55
  723. 16 ffffa185`3a59f540 fffff806`2566ed99     mup!MupiCallUncProvider+0xb8
  724. 17 ffffa185`3a59f5b0 fffff806`2566ecce     mup!MupStateMachine+0x59
  725. 18 ffffa185`3a59f5e0 fffff806`21a2d935     mup!MupFsdIrpPassThrough+0x17e
  726. 19 ffffa185`3a59f650 fffff806`1ea94a76     nt!IofCallDriver+0x55
  727. 1a ffffa185`3a59f690 fffff806`21a2d935     FLTMGR!FltpDispatch+0xd6
  728. 1b ffffa185`3a59f6f0 fffff806`21e2e30c     nt!IofCallDriver+0x55
  729. 1c ffffa185`3a59f730 fffff806`21e2df5a     nt!IopSynchronousServiceTail+0x34c
  730. 1d ffffa185`3a59f7d0 fffff806`21e2d236     nt!IopXxxControlFile+0xd0a
  731. 1e ffffa185`3a59f920 fffff806`21c119c5     nt!NtDeviceIoControlFile+0x56
  732. 1f ffffa185`3a59f990 00007ffc`0d44d0c4     nt!KiSystemServiceCopyEnd+0x25
  733. 20 00000026`9d0fa738 00007ffc`0ad2358b     ntdll!NtDeviceIoControlFile+0x14
  734. 21 00000026`9d0fa740 00007ffc`0b8f5921     KERNELBASE!DeviceIoControl+0x6b
  735. 22 00000026`9d0fa7b0 00007ff7`af9c5344     KERNEL32!DeviceIoControlImplementation+0x81
  736. 23 00000026`9d0fa800 00007ff7`af9c522b     nfsd_debug!nfsd_worker_thread_main(void * args = 0x00007ff7`afa14010)+0xe4 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\daemon\nfs41_daemon.c @ 113]
  737. 24 00000026`9d0ffb70 00007ffb`b3af2d20     nfsd_debug!nfsd_thread_main(void * args = 0x00007ff7`afa14010)+0x2b [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\daemon\nfs41_daemon.c @ 172]
  738. 25 00000026`9d0ffbf0 00000000`00000000     ucrtbased!thread_start<unsigned int (void * parameter = 0x00000206`7765d410)+0xb0 [minkernel\crts\ucrt\src\appcrt\startup\thread.cpp @ 97]
  739. 1: kd> .frame 0n12;dv /t /v
  740. 0c ffffa185`3a59f140 fffff806`263e49d3     nfs41_driver!marshal_nfs41_open+0xa6 [C:\cygwin64\home\roland_mainz\work\msnfs41_uidmapping\ms-nfs41-client\sys\nfs41_driver.c @ 708]
  741. ffffa185`3a59f1e0 struct _updowncall_entry * entry = 0xffffe00d`83902e60
  742. ffffa185`3a59f1e8 unsigned char * buf = 0xffffe00d`8ca02000 "H???"
  743. ffffa185`3a59f1f0 unsigned long buf_len = 0x2000
  744. ffffa185`3a59f1f8 unsigned long * len = 0xffffa185`3a59f278
  745. ffffa185`3a59f1c0 unsigned char * tmp = 0xffffe00d`8ca02020 ""
  746. ffffa185`3a59f1b0 long status = 0n0
  747. ffffa185`3a59f1b4 unsigned long header_len = 0
  748. 1: kd> dx -r1 ((nfs41_driver!_updowncall_entry *)0xffffe00d83902e60)
  749. ((nfs41_driver!_updowncall_entry *)0xffffe00d83902e60)                 : 0xffffe00d83902e60 [Type: _updowncall_entry *]
  750.     [+0x000] version          : 0x1ac48 [Type: unsigned long]
  751.     [+0x008] xid              : 172304800 [Type: __int64]
  752.     [+0x010] opcode           : 0x2 [Type: unsigned long]
  753.     [+0x014] status           : 0 [Type: long]
  754.     [+0x018] state            : NFS41_NOT_WAITING (3) [Type: _nfs41_updowncall_state]
  755.     [+0x020] lock             [Type: _FAST_MUTEX]
  756.     [+0x058] next             [Type: _LIST_ENTRY]
  757.     [+0x068] cond             [Type: _KEVENT]
  758.     [+0x080] errno            : 0x0 [Type: unsigned long]
  759.     [+0x084] async_op         : 0x0 [Type: unsigned char]
  760.     [+0x088] sec_ctx          [Type: _SECURITY_CLIENT_CONTEXT]
  761.     [+0x0d0] psec_ctx         : 0xffffe00d8cc4ff10 [Type: _SECURITY_CLIENT_CONTEXT *]
  762.     [+0x0d8] open_state       : 0xffffffffffffffff [Type: void *]
  763.     [+0x0e0] session          : 0x20677652770 [Type: void *]
  764.     [+0x0e8] filename         : 0xffffcc04a6679ac0 [Type: _UNICODE_STRING *]
  765.     [+0x0f0] buf              : 0x0 [Type: void *]
  766.     [+0x0f8] buf_len          : 0x0 [Type: unsigned long]
  767.     [+0x100] ChangeTime       : 0x0 [Type: unsigned __int64]
  768.     [+0x108] u                [Type: <unnamed-tag>]
  769. 1: kd> dx -r1 (*((nfs41_driver!_updowncall_entry *)0xffffe00d83902e60)).filename
  770. (*((nfs41_driver!_updowncall_entry *)0xffffe00d83902e60)).filename                 : 0xffffcc04a6679ac0 [Type: _UNICODE_STRING *]
  771.     [+0x000] Length           : 0x5c [Type: unsigned short]
  772.     [+0x002] MaximumLength    : 0x0 [Type: unsigned short]
  773.     [+0x008] Buffer           : 0x1400000000 : Unable to read memory at Address 0x1400000000 [Type: unsigned short *]

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