gdm-session-worker crashed with SIGSEGV in calloc()

[miked]

Dell Inspiron 1150 Laptop without Hard Drive Running Ubuntu 11.10 Oneric Ocelot Beta 1 off USB Drive with updates from Natty Narwhal 11.04 Final

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: gdm 3.0.4-0ubuntu10
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic i686
ApportVersion: 1.23-0ubuntu1
Architecture: i386
Date: Sat Sep 17 18:22:48 2011
ExecutablePath: /usr/lib/gdm/gdm-session-worker
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcCmdline: /usr/lib/gdm/gdm-session-worker
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
SegvAnalysis:
 Segfault happened at: 0x76af08: mov 0x4(%edi),%edx
 PC (0x0076af08) ok
 source "0x4(%edi)" (0x0a8f9fd4) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gdm
StacktraceTop:
 ?? () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /lib/i386-linux-gnu/libc.so.6
 calloc () from /lib/i386-linux-gnu/libc.so.6
 open_memstream () from /lib/i386-linux-gnu/libc.so.6
 __vsyslog_chk () from /lib/i386-linux-gnu/libc.so.6
Title: gdm-session-worker crashed with SIGSEGV in calloc()
UpgradeStatus: Upgraded to oneiric on 2011-09-12 (8 days ago)
UserGroups: admin

[Apport retracing service (apport)]

StacktraceTop:
 malloc_consolidate (av=0x875400) at malloc.c:5155
 malloc_consolidate (av=0x875400) at malloc.c:5089
 _int_malloc (av=0x875400, bytes=8192) at malloc.c:4373
 __libc_calloc (n=1, elem_size=8192) at malloc.c:4065
 __GI_open_memstream (bufloc=0xbf8abf20, sizeloc=0xbf8abf24) at memstream.c:86

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.