VBoxSVC crashed with SIGSEGV in malloc()

[mastaiza]

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ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: virtualbox 4.1.2-dfsg-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu2
Architecture: i386
Date: Sat Oct 8 00:02:00 2011
ExecutablePath: /usr/lib/virtualbox/VBoxSVC
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
ProcCmdline: /usr/lib/virtualbox/VBoxSVC --auto-shutdown
SegvAnalysis:
 Segfault happened at: 0x688f71: mov %ecx,0x8(%ebp)
 PC (0x00688f71) ok
 source "%ecx" ok
 destination "0x8(%ebp)" (0xee2e6011) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: virtualbox
StacktraceTop:
 ?? () from /lib/i386-linux-gnu/libc.so.6
 malloc () from /lib/i386-linux-gnu/libc.so.6
 RTSemEventCreateEx () from /usr/lib/virtualbox/VBoxRT.so
 RTCritSectInitEx () from /usr/lib/virtualbox/VBoxRT.so
 ?? ()
Title: VBoxSVC crashed with SIGSEGV in malloc()
UpgradeStatus: Upgraded to oneiric on 2011-09-25 (12 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 _int_malloc (av=0x792400, bytes=84) at malloc.c:4439
 __GI___libc_malloc (bytes=84) at malloc.c:3660
 RTSemEventCreateEx (phEventSem=0x9e9cb04, fFlags=1, hClass=0x0, pszNameFmt=0x0) at /build/buildd/virtualbox-4.1.2-dfsg/src/VBox/Runtime/r3/posix/semevent-posix.cpp:114
 RTCritSectInitEx (pCritSect=0x9e9caf0, fFlags=0, hClass=0x0, uSubClass=2, pszNameFmt=0x0) at /build/buildd/virtualbox-4.1.2-dfsg/src/VBox/Runtime/generic/critsect-generic.cpp:94
 util::WriteLockHandle::WriteLockHandle (this=0x9ee202c, lockClass=util::LOCKCLASS_OBJECTSTATE) at /build/buildd/virtualbox-4.1.2-dfsg/src/VBox/Main/glue/AutoLock.cpp:245