Comment 2 for bug 621371

The relevant stack trace (also in CurrentDmesg.txt http://launchpadlibrarian.net/54082134/CurrentDmesg.txt):

[ 515.665089] Pid: 1561, comm: dbus-daemon Not tainted 2.6.35-16-generic #22-Ubuntu
[ 515.665093] Call Trace:
[ 515.665103] [<c013e642>] __schedule_bug+0x62/0x70
[ 515.665110] [<c05c4340>] schedule+0x760/0x7a0
[ 515.665115] [<c05c44c2>] _cond_resched+0x32/0x50
[ 515.665120] [<c01fac3e>] anon_vma_prepare+0x1e/0x130
[ 515.665124] [<c01f62ad>] expand_downwards+0x1d/0x170
[ 515.665130] [<c01df709>] ? __alloc_pages_nodemask+0xd9/0x1c0
[ 515.665134] [<c01f640d>] expand_stack+0xd/0x10
[ 515.665139] [<c01f032b>] do_anonymous_page+0x2fb/0x310
[ 515.665143] [<c05c60fd>] ? _raw_spin_lock+0xd/0x10
[ 515.665147] [<c01f4170>] handle_mm_fault+0x340/0x400
[ 515.665150] [<c01f4339>] __get_user_pages+0x109/0x3f0
[ 515.665154] [<c01f46c5>] get_user_pages+0x55/0x70
[ 515.665159] [<c021d3d2>] get_arg_page+0x52/0xb0
[ 515.665165] [<c035996b>] ? strnlen_user+0x2b/0x60
[ 515.665169] [<c021d500>] copy_strings+0xd0/0x180
[ 515.665173] [<c021d5d9>] copy_strings_kernel+0x29/0x40
[ 515.665177] [<c021efba>] do_execve+0x19a/0x2c0
[ 515.665181] [<c05c6d37>] ? error_code+0x73/0x78
[ 515.665185] [<c0359a9a>] ? strncpy_from_user+0x3a/0x70
[ 515.665192] [<c0109d97>] sys_execve+0x37/0x70
[ 515.665196] [<c010316e>] ptregs_execve+0x12/0x18
[ 515.665200] [<c05c6634>] ? syscall_call+0x7/0xb