Opened 9 years ago
Closed 9 years ago
#14415 closed defect (fixed)
Assertion failure 'Tag != 0' from VBoxDisp.dll
| Reported by: | Thomas Faber | Owned by: | |
|---|---|---|---|
| Component: | guest additions | Version: | VirtualBox 5.0.0 |
| Keywords: | Cc: | ||
| Guest type: | Windows | Host type: | all |
Description
When running VBox 5 with Guest Additions against a checked build of the Windows kernel, it will assert on startup. VBoxDisp is calling EngAllocMem with a Tag of zero, which is invalid. This is a regression, and worked fine in 4.x.
From a quick look through the source it seems to come from this line: src/VBox/Additions/WINNT/Graphics/Video/disp/xpdm/VBoxDispVBVA.cpp:305
return EngAllocMem(0, cb, 0);
WinDbg output:
*** Assertion failed: Tag != 0 *** Source File: d:\srvrtm\base\ntos\ex\pool.c, line 1839 Break repeatedly, break Once, Ignore, terminate Process, or terminate Thread (boipt)? b b Execute '.cxr F8646554' to dump context Break instruction exception - code 80000003 (first chance) nt!DbgBreakPoint: 811507a8 cc int 3 *** ERROR: Module load completed but symbols could not be loaded for VBoxDisp.dll *** ERROR: Symbol file could not be found. Defaulted to export symbols for WINSRV.DLL - *** ERROR: Symbol file could not be found. Defaulted to export symbols for CSRSRV.DLL - *** ERROR: Module load completed but symbols could not be loaded for CSRSS.EXE kd> .reload Connected to Windows Server 2003 3790 x86 compatible target at (Fri Aug 7 16:28:53.983 2015 (UTC + 2:00)), ptr64 FALSE Loading Kernel Symbols ............................................................... ............................. Loading User Symbols .......... Loading unloaded module list ........ *** ERROR: Module load completed but symbols could not be loaded for VBoxDisp.dll *** ERROR: Symbol file could not be found. Defaulted to export symbols for winsrv.dll - *** ERROR: Symbol file could not be found. Defaulted to export symbols for CSRSRV.dll - *** ERROR: Module load completed but symbols could not be loaded for csrss.exe kd> kp ChildEBP RetAddr f864653c 811529f6 nt!DbgBreakPoint f8646824 811823b9 nt!RtlAssert+0xba f8646884 bf876b12 nt!ExAllocatePoolWithTag+0x29 f8646898 bf88814a win32k!Win32AllocPool+0x1a f86468b0 bf9eb571 win32k!EngAllocMem+0x34 WARNING: Stack unwind information not available. Following frames may be wrong. f86468c4 bf9f6053 VBoxDisp+0x3571 f86468f4 bf9f6472 VBoxDisp+0xe053 f8646904 bf9f5669 VBoxDisp+0xe472 f8646928 bf9eb733 VBoxDisp+0xd669 f86469ac bf9e9e1f VBoxDisp+0x3733 f86469c4 bf807b5c VBoxDisp+0x1e1f f86469fc bf82be02 win32k!WatchdogDrvEnableSurface+0x36 f8646a18 bf820998 win32k!PDEVOBJ::bMakeSurface+0x43 f8646a78 bf81ebff win32k!hCreateHDEV+0x398 f8646bf4 bf8189fe win32k!DrvCreateMDEV+0x4f0 f8646ce8 bf81b8aa win32k!DrvChangeDisplaySettings+0x2eb f8646d24 bf812ba9 win32k!InitVideo+0x28 f8646d48 bf824314 win32k!UserInitialize+0x10d f8646d50 8116fdb5 win32k!NtUserInitialize+0x8b f8646d50 7c82ed64 nt!KiFastCallEntry+0x135 0015fd7c 75a8aa43 ntdll!KiFastSystemCallRet 0015fdb0 75a53496 winsrv!ConServerDllInitialization+0x55c 0015fe20 75a5306f CSRSRV!CsrUnhandledExceptionFilter+0x268 0015ff78 75a5313f CSRSRV!CsrPopulateDosDevices+0x603 0015ff8c 4a6810a7 CSRSRV!CsrServerInitialization+0x79 0015ffa4 4a68131e csrss+0x10a7 0015fff4 00000000 csrss+0x131e
Change History (3)
comment:1 by , 9 years ago
comment:2 by , 9 years ago
Fix is part of the latest 5.0 Guest Additions as can be found at our test builds page.
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Thanks. The fix will be part of the next 5.0.x maintenance release.