[vbox-dev] null pointer in macGuestSize

[Ribhi Kamal]

I've been seeing a crash when closing VirtualBox.exe that is almost never
reproducible. Few days ago I managed to get a crash dump and ran the
analysis, see below. At the time of the crash, I was closing the virtual
machine after it had been running for ~24 hours. Unfortunately, I can't
find the log files

I'm using the following:
VirtualBox 4.2.8 (Cross compiled with VS2010-SP1 on windows 7 64bit, Target
Host = x86)
Host Win7 32bit
Guest Linux 2.6 32bit
Build Type: Release

Please let me know if you have any questions.

Thanks,
Ribhi

Log files:
Successful: https://www.dropbox.com/s/xrvcr8sud4z63ia/Success.log
Crash: https://www.dropbox.com/s/p5pslbt3sl9cpeo/Crash.log


0:000> !analyze -v -f
*******************************************************************************

*
*
*                        Exception
Analysis                                   *
*
*
*******************************************************************************


GetPageUrlData failed, server returned HTTP status 404
URL requested:
http://watson.microsoft.com/StageOne/VirtualBox_exe/4_2_8_0/51420e3b/unknown/0_0_0_0/bbbbbbb4/80000003/00000000.htm?Retriage=1

FAULTING_IP:
VirtualBox!UIMachineView::maxGuestSize+18
[c:\vboxbuild\virtualbox\4.2.8\src\src\vbox\frontends\virtualbox\src\runtime\uimachineview.cpp
@ 702]
*0145ed68 f00fc70f        lock cmpxchg8b qword ptr [edi] *

EXCEPTION_RECORD:  ffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 00000000
   ExceptionCode: 80000003 (Break instruction exception)
  ExceptionFlags: 00000000
NumberParameters: 0

FAULTING_THREAD:  00000ef4

DEFAULT_BUCKET_ID:  STATUS_BREAKPOINT

PROCESS_NAME:  VirtualBox.exe

ERROR_CODE: (NTSTATUS) 0x80000003 - {EXCEPTION}  Breakpoint  A breakpoint
has been reached.

EXCEPTION_CODE: (HRESULT) 0x80000003 (2147483651) - One or more arguments
are invalid

MOD_LIST: <ANALYSIS/>

NTGLOBALFLAG:  0

APPLICATION_VERIFIER_FLAGS:  0

ADDITIONAL_DEBUG_TEXT:  Followup set based on attribute
[Is_ChosenCrashFollowupThread] from Frame:[0] on thread:[PSEUDO_THREAD]

LAST_CONTROL_TRANSFER:  from 0143bea0 to 0145ed68

PRIMARY_PROBLEM_CLASS:  STATUS_BREAKPOINT

BUGCHECK_STR:  APPLICATION_FAULT_STATUS_BREAKPOINT_NULL_POINTER_READ

STACK_TEXT:
03a3ca98 0145ed68 virtualbox!UIMachineView::maxGuestSize+0x18
03a3cab0 0143bea0 virtualbox!UIFrameBuffer::VideoModeSupported+0x30
03a3cac8 6927c724 vboxc!vmmdevVideoModeSupported+0x74
03a3caec 690b4edc vboxdd!vmmdevRequestHandler+0xecc
03a3fb5c 72f198d1 vboxvmm!IOMIOPortWrite+0x91
03a3fb84 72f0891f vboxvmm!HWACCMR3RestartPendingIOInstr+0xcf
03a3fba4 72ea303c vboxvmm!emR3ExecuteIOInstruction+0x1c
03a3fc78 72ea3589 vboxvmm!emR3HwaccmHandleRC+0x189
03a3fc8c 72ea3788 vboxvmm!emR3HwAccExecute+0x168
03a3fcb0 72ea0d84 vboxvmm!EMR3ExecuteVM+0x274
03a3fcd8 72efb2aa vboxvmm!vmR3EmulationThreadWithId+0x45a
03a3fcf8 72efb2f4 vboxvmm!vmR3EmulationThread+0x14
03a3fd0c 69ca1523 vboxrt!rtThreadMain+0x33
03a3fd38 69ce539b vboxrt!rtThreadNativeMain+0x6b
03a3fd58 6bb6c556 msvcr100!_endthreadex+0x3f
03a3fd90 6bb6c600 msvcr100!_endthreadex+0xce
03a3fd9c 76b4ed6c kernel32!BaseThreadInitThunk+0xe
03a3fda8 7722377b ntdll!__RtlUserThreadStart+0x70
03a3fde8 7722374e ntdll!_RtlUserThreadStart+0x1b


STACK_COMMAND:  .cxr 0000000003A3C7B4 ; kb ; dds 3a3ca98 ; kb

FOLLOWUP_IP:
VirtualBox!UIMachineView::maxGuestSize+0
[c:\vboxbuild\virtualbox\4.2.8\src\src\vbox\frontends\virtualbox\src\runtime\uimachineview.cpp
@ 701]
0145ed50 83ec0c          sub     esp,0Ch

FAULTING_SOURCE_CODE:
   697:                       RT_MAKE_U64(maxSize.height(),
maxSize.width()));
   698: }
   699:
   700: QSize UIMachineView::maxGuestSize()
>  701: {
   702:     uint64_t u64Size = ASMAtomicReadU64(&m_u64MaxGuestSize);
   703:     return QSize(int(RT_HI_U32(u64Size)), int(RT_LO_U32(u64Size)));
   704: }
   705:
   706: QSize UIMachineView::guestSizeHint()


SYMBOL_NAME:  virtualbox!UIMachineView::maxGuestSize+0

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: VirtualBox

IMAGE_NAME:  VirtualBox.exe

DEBUG_FLR_IMAGE_TIMESTAMP:  51420e3b

FAILURE_BUCKET_ID:
STATUS_BREAKPOINT_80000003_VirtualBox.exe!UIMachineView::maxGuestSize

BUCKET_ID:
APPLICATION_FAULT_STATUS_BREAKPOINT_NULL_POINTER_READ_virtualbox!UIMachineView::maxGuestSize+0


WATSON_STAGEONE_URL:
http://watson.microsoft.com/StageOne/VirtualBox_exe/4_2_8_0/51420e3b/unknown/0_0_0_0/bbbbbbb4/80000003/00000000.htm?Retriage=1

Followup: MachineOwner
---------

-- 
-- Ribhi
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