BUG: soft lockup - CPU#0 stuck for 64s! [watchdog/0:5]
Modules linked in: binfmt_misc vboxvideo drm vboxvfs snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm iptable_filter ip_tables x_tables snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq ppdev snd_timer snd_seq_device i2c_piix4 snd psmouse lp serio_raw parport_pc parport soundcore snd_page_alloc vboxadd floppy e1000
CPU 0:
Modules linked in: binfmt_misc vboxvideo drm vboxvfs snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm iptable_filter ip_tables x_tables snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq ppdev snd_timer snd_seq_device i2c_piix4 snd psmouse lp serio_raw parport_pc parport soundcore snd_page_alloc vboxadd floppy e1000
Pid: 5, comm: watchdog/0 Not tainted 2.6.31-11-generic #36-Ubuntu VirtualBox
RIP: 0010:[<ffffffff81521495>]  [<ffffffff81521495>] thread_return+0x1e4/0x37f
RSP: 0018:ffff8800229d9e20  EFLAGS: 00000282
RAX: ffff8800229bdac0 RBX: ffff8800229d9eb0 RCX: ffff8800229bdd18
RDX: ffff8800229bdac0 RSI: ffff8800019dad18 RDI: ffff8800019da580
RBP: ffffffff81012b6e R08: 00000001b6ebafb4 R09: 0000001b0ae4e40b
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8800205ddac0 R15: 0000000000011420
FS:  00007f7d3db6f910(0000) GS:ffff8800019c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00007f13577af7cd CR3: 0000000020dc5000 CR4: 00000000000006b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 [<ffffffff810ae370>] ? watchdog+0x0/0x90
 [<ffffffff810ae3c2>] ? watchdog+0x52/0x90
 [<ffffffff810ae370>] ? watchdog+0x0/0x90
 [<ffffffff810737a6>] ? kthread+0xa6/0xb0
 [<ffffffff8101308a>] ? child_rip+0xa/0x20
 [<ffffffff81073700>] ? kthread+0x0/0xb0
 [<ffffffff81013080>] ? child_rip+0x0/0x20