[   55.641063] BUG: unable to handle kernel NULL pointer dereference at 00000028
[   55.641066] IP: [<f823d4e8>] usb_fill_int_urb+0x1a/0x81 [btusb]
[   55.641074] *pdpt = 0000000035e31001 *pde = 0000000000000000
[   55.641078] Oops: 0002 [#1] SMP
[   55.641081] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0/voltage_now
[   55.641084] Modules linked in: sco bridge stp bnep l2cap ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi nfsd exportfs nfs lockd nfs_acl auth_rpcgss sunrpc snd_hda_codec_intelhdmi snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss fbcon tileblit font snd_pcm bitblit softcursor snd_seq_dummy snd_seq_oss arc4 snd_seq_midi snd_rawmidi joydev snd_seq_midi_event snd_seq snd_timer iwlagn iwlcore snd_seq_device uvcvideo i915 drm_kms_helper snd drm lp intel_agp dell_laptop mac80211 sdhci_pci psmouse soundcore videodev btusb snd_page_alloc i2c_algo_bit serio_raw ricoh_mmc sdhci dcdbas agpgart v4l1_compat parport video cfg80211 bluetooth led_class output usbhid hid ohci1394 ieee1394 ahci e1000e
[   55.641140]
[   55.641143] Pid: 1611, comm: bluetoothd Not tainted (2.6.32-failslab-2 #4) Latitude E4300                  
[   55.641146] EIP: 0060:[<f823d4e8>] EFLAGS: 00010296 CPU: 1
[   55.641150] EIP is at usb_fill_int_urb+0x1a/0x81 [btusb]
[   55.641152] EAX: 00000000 EBX: f6e8bbc0 ECX: 40408280 EDX: f6f4c800
[   55.641154] ESI: f6adce28 EDI: fffffffb EBP: f5651e20 ESP: f5651e14
[   55.641156]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[   55.641159] Process bluetoothd (pid: 1611, ti=f5650000 task=f5ec72c0 task.ti=f5650000)
[   55.641160] Stack:
[   55.641162]  40408280 f6f4c800 00000000 f5651e68 f823d903 f6e8bbc0 00000010 f823d68f
[   55.641167] <0> f6adcc00 00000001 000000d0 f6adcc00 000000d0 00000010 00000010 00000000
[   55.641173] <0> 40408280 f6e8bbc0 00000000 f5da4200 f6adcc00 f5651e94 f823e28f f6adcc00
[   55.641179] Call Trace:
[   55.641185]  [<f823d903>] ? btusb_submit_intr_urb+0xfa/0x174 [btusb]
[   55.641190]  [<f823d68f>] ? btusb_intr_complete+0x0/0x17a [btusb]
[   55.641195]  [<f823e28f>] ? btusb_open+0x7f/0x12f [btusb]
[   55.641200]  [<c05923af>] ? _spin_lock_irqsave+0x2f/0x50
[   55.641205]  [<c0578465>] ? rfkill_blocked+0x25/0x40
[   55.641213]  [<f854cb9d>] ? hci_dev_open+0x7d/0x220 [bluetooth]
[   55.641217]  [<c02f1e9a>] ? security_capable+0x2a/0x30
[   55.641225]  [<f85511ba>] ? hci_sock_ioctl+0x1ba/0x2b0 [bluetooth]
[   55.641230]  [<c04bad35>] ? sock_ioctl+0x65/0x240
[   55.641233]  [<c04bacd0>] ? sock_ioctl+0x0/0x240
[   55.641236]  [<c02176a1>] ? vfs_ioctl+0x21/0x90
[   55.641239]  [<c0217872>] ? do_vfs_ioctl+0x72/0x5c0
[   55.641242]  [<c04bb132>] ? sock_map_fd+0x42/0x70
[   55.641246]  [<c0594830>] ? do_page_fault+0x160/0x3a0
[   55.641248]  [<c0217e27>] ? sys_ioctl+0x67/0x80
[   55.641252]  [<c0109403>] ? sysenter_do_call+0x12/0x28
[   55.641254] Code: 8b 55 10 89 50 78 8b 45 fc 8b 55 14 89 50 74 c9 c3 55 89 e5 83 ec 0c 0f 1f 44 00 00 89 45 fc 89 55 f8 89 4d f4 8b 45 fc 8b 55 f8 <89> 50 28 8b 45 fc 8b 55 f4 89 50 30 8b 45 fc 8b 55 08 89 50 3c
[   55.641287] EIP: [<f823d4e8>] usb_fill_int_urb+0x1a/0x81 [btusb] SS:ESP 0068:f5651e14
[   55.641295] CR2: 0000000000000028
[   55.641298] ---[ end trace 54fd26d2c9baa0d8 ]---