Actually, my X session crashed, and upon next login I got the dialogue box about VBoxSVC crashing as well.
ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: virtualbox 4.1.6-dfsg-2
ProcVersionSignature: Ubuntu 3.2.0-4.10-generic 3.2.0-rc5
Uname: Linux 3.2.0-4-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
CheckboxSubmission: dd3689fa6394f60ec14dbe98d0bab891
CheckboxSystem: b633b4f40868d491c2ae5b50030ce6f3
Date: Tue Dec 13 01:35:28 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/virtualbox/VBoxSVC
ExecutableTimestamp: 1321828585
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
ProcCmdline: /usr/lib/virtualbox/VBoxSVC --auto-shutdown
ProcCwd: /
ProcEnviron:
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
SegvAnalysis:
Segfault happened at: 0x7ff8649ecd16: mov 0x8(%rbx),%rdx
PC (0x7ff8649ecd16) ok
source "0x8(%rbx)" (0x7ff758002897) not located in a known VMA region (needed readable region)!
destination "%rdx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: virtualbox
StacktraceTop:
?? () from /lib/x86_64-linux-gnu/libc.so.6
?? () from /lib/x86_64-linux-gnu/libc.so.6
free () from /lib/x86_64-linux-gnu/libc.so.6
?? () from /lib/x86_64-linux-gnu/libc.so.6
iconv_close () from /lib/x86_64-linux-gnu/libc.so.6
Title: VBoxSVC crashed with SIGSEGV in free()
UpgradeStatus: Upgraded to precise on 2011-12-12 (0 days ago)
UserGroups: adm admin cdrom dialout disk libvirtd lpadmin plugdev sambashare vde2-net
StacktraceTop:
malloc_consolidate (av=0x7ff858000020) at malloc.c:5153
malloc_consolidate (av=0x7ff858000020) at malloc.c:5115
_int_free (av=0x7ff858000020, p=<optimized out>) at malloc.c:5034
__GI___libc_free (mem=<optimized out>) at malloc.c:3738
__gconv_close (cd=0x7ff858001630) at gconv_close.c:56