BUG: scheduling while atomic: VirtualBox/0x00000001/5767, CPU#1
Modules linked in: isofs udf crc_itu_t nls_utf8 hfsplus binfmt_misc ppdev bridge stp bnep vboxnetflt vboxnetadp vboxdrv snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm hid_apple snd_seq_dummy usbhid snd_seq_oss applesmc led_class snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq input_polldev snd_timer snd_seq_device coretemp iptable_filter ip_tables nvidia_bl snd x_tables uvcvideo soundcore nvidia(P) lp snd_page_alloc videodev shpchp parport lib80211_crypt_tkip v4l1_compat v4l2_compat_ioctl32 wl(P) btusb joydev i2c_nforce2 bcm5974 lib80211 raid10 raid456 raid6_pq async_xor async_memcpy async_tx xor raid1 raid0 multipath linear usb_storage ohci1394 ieee1394 forcedeth
Pid: 5767, comm: VirtualBox Tainted: P           2.6.31-9-rt #152-Ubuntu
Call Trace:
 [<ffffffff8104f92a>] __schedule_bug+0x6a/0x70
 [<ffffffff8153bfb9>] thread_return+0x278/0x3cf
 [<ffffffff8153c394>] schedule+0x14/0x30
 [<ffffffff8153d41a>] rt_spin_lock_slowlock+0x1ba/0x290
 [<ffffffff8153de46>] rt_spin_lock+0x36/0x60
 [<ffffffffa0d5112d>] RTSpinlockAcquire+0xd/0x10 [vboxdrv]
 [<ffffffffa0d5499f>] RTHandleTableLookupWithCtx+0x7f/0x120 [vboxdrv]
 [<ffffffffa0d480a5>] SUPSemEventSignal+0x85/0xb0 [vboxdrv]
 [<ffffffffa0d76355>] g_abExecMemory+0x1ce35/0x180000 [vboxdrv]
 [<ffffffffa0d67f20>] g_abExecMemory+0xea00/0x180000 [vboxdrv]
 [<ffffffffa0d64d2e>] ? g_abExecMemory+0xb80e/0x180000 [vboxdrv]
 [<ffffffffa0d60852>] g_abExecMemory+0x7332/0x180000 [vboxdrv]
 [<ffffffffa0d9b007>] g_abExecMemory+0x41ae7/0x180000 [vboxdrv]
 [<ffffffffa0d6a8eb>] g_abExecMemory+0x113cb/0x180000 [vboxdrv]
 [<ffffffffa0d4692a>] supdrvIOCtlFast+0x6a/0x70 [vboxdrv]
 [<ffffffffa0d461b7>] VBoxDrvLinuxIOCtl+0x47/0x1c0 [vboxdrv]
 [<ffffffff81131fdd>] vfs_ioctl+0x1d/0xa0
 [<ffffffff81132168>] do_vfs_ioctl+0x78/0x3f0
 [<ffffffff81123ecd>] ? fget_light+0x9d/0xb0
 [<ffffffff81132561>] sys_ioctl+0x81/0xa0
 [<ffffffff81012102>] system_call_fastpath+0x16/0x1b