[39418.981845] sysfs: duplicate filename 'acl0021FE871427' can not be created
[39418.981861] WARNING: at /build/buildd/linux-2.6.24/fs/sysfs/dir.c:424 sysfs_add_one()
[39418.981867] Pid: 10, comm: events/1 Tainted: P        2.6.24-21-generic #1
[39418.981894]  [<c01d72cf>] sysfs_add_one+0x9f/0xe0
[39418.981926]  [<c01d7808>] create_dir+0x48/0x90
[39418.981955]  [<c01d7879>] sysfs_create_dir+0x29/0x50
[39418.981964]  [<c02152bf>] kobject_get+0xf/0x20
[39418.981974]  [<c0215783>] kobject_add+0x93/0x1b0
[39418.982008]  [<c02156c1>] kobject_set_name+0x81/0xb0
[39418.982030]  [<f8a5fc60>] add_conn+0x0/0x90 [bluetooth]
[39418.982046]  [<c02807d7>] device_add+0xa7/0x510
[39418.982071]  [<f8a5fc60>] add_conn+0x0/0x90 [bluetooth]
[39418.982084]  [<c02142e2>] __next_cpu+0x12/0x20
[39418.982126]  [<f8a5fc60>] add_conn+0x0/0x90 [bluetooth]
[39418.982139]  [<f8a5fc7d>] add_conn+0x1d/0x90 [bluetooth]
[39418.982164]  [<c013cd4f>] run_workqueue+0xbf/0x160
[39418.982189]  [<c013d7f0>] worker_thread+0x0/0xe0
[39418.982198]  [<c013d874>] worker_thread+0x84/0xe0
[39418.982210]  [<c0140b00>] autoremove_wake_function+0x0/0x40
[39418.982228]  [<c013d7f0>] worker_thread+0x0/0xe0
[39418.982238]  [<c0140842>] kthread+0x42/0x70
[39418.982266]  [<c0140800>] kthread+0x0/0x70
[39418.982278]  [<c0105667>] kernel_thread_helper+0x7/0x10
[39418.982302]  =======================
[39418.982308] kobject_add failed for acl0021FE871427 with -EEXIST, don't try to register things with the same name in the same directory.
[39418.982314] Pid: 10, comm: events/1 Tainted: P        2.6.24-21-generic #1
[39418.982324]  [<c0215803>] kobject_add+0x113/0x1b0
[39418.982336]  [<c02156c1>] kobject_set_name+0x81/0xb0
[39418.982381]  [<f8a5fc60>] add_conn+0x0/0x90 [bluetooth]
[39418.982394]  [<c02807d7>] device_add+0xa7/0x510
[39418.982418]  [<f8a5fc60>] add_conn+0x0/0x90 [bluetooth]
[39418.982431]  [<c02142e2>] __next_cpu+0x12/0x20
[39418.982471]  [<f8a5fc60>] add_conn+0x0/0x90 [bluetooth]
[39418.982485]  [<f8a5fc7d>] add_conn+0x1d/0x90 [bluetooth]
[39418.982508]  [<c013cd4f>] run_workqueue+0xbf/0x160
[39418.982534]  [<c013d7f0>] worker_thread+0x0/0xe0
[39418.982543]  [<c013d874>] worker_thread+0x84/0xe0
[39418.982555]  [<c0140b00>] autoremove_wake_function+0x0/0x40
[39418.982573]  [<c013d7f0>] worker_thread+0x0/0xe0
[39418.982595]  [<c0140842>] kthread+0x42/0x70
[39418.982600]  [<c0140800>] kthread+0x0/0x70
[39418.982611]  [<c0105667>] kernel_thread_helper+0x7/0x10
[39418.982633]  =======================
[39418.982637] add_conn: Failed to register connection device
[40174.189880] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000010
[40174.189890] printing eip: c031a044 *pde = 00000000 
[40174.189896] Oops: 0000 [#1] SMP 
[40174.189901] Modules linked in: vmnet(P) vmmon(P) binfmt_misc rfcomm l2cap ppdev speedstep_lib cpufreq_stats cpufreq_conservative cpufreq_ondemand freq_table cpufreq_powersave cpufreq_userspace sbs container sbshc video output dock battery iptable_filter ip_tables x_tables aes_i586 dm_crypt dm_mod ac w83627ehf hwmon_vid ipv6 eeprom i2c_i801 lp snd_hda_intel snd_hwdep snd_pcm_oss snd_pcm snd_page_alloc hci_usb snd_mixer_oss bluetooth snd_seq_dummy nvidia(P) sky2 i2c_core snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd button iTCO_wdt iTCO_vendor_support shpchp soundcore intel_agp evdev pci_hotplug agpgart parport_pc parport pcspkr ext3 jbd mbcache sg sd_mod sr_mod cdrom usbhid hid floppy ehci_hcd ata_piix pata_acpi ata_generic libata scsi_mod uhci_hcd usbcore thermal processor fan fbcon tileblit font bitblit softcursor fuse
[40174.189988] 
[40174.189993] Pid: 9, comm: events/0 Tainted: P        (2.6.24-21-generic #1)
[40174.189997] EIP: 0060:[<c031a044>] EFLAGS: 00010292 CPU: 0
[40174.190006] EIP is at klist_del+0x14/0x50
[40174.190009] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
[40174.190013] ESI: f0a9b900 EDI: f0a9b914 EBP: f7154eb8 ESP: f7c81f58
[40174.190016]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[40174.190020] Process events/0 (pid: 9, ti=f7c80000 task=f7c7e000 task.ti=f7c80000)
[40174.190023] Stack: 00000000 f0a9b900 f7c0ce80 c0280405 00000000 f0a9b900 f7c0ce80 f8a5fc20 
[40174.190033]        f8a5fc52 f0a9b8f0 f7c0ce80 c013cd4f 00000000 000000ff 00000000 00000000 
[40174.190042]        f7c0ce84 f7c0ce8c f7c0ce80 c013d7f0 f7c0ce84 c013d874 00000000 f7c7e000 
[40174.190051] Call Trace:
[40174.190063]  [<c0280405>] device_del+0x15/0x250
[40174.190082]  [<f8a5fc20>] del_conn+0x0/0x40 [bluetooth]
[40174.190099]  [<f8a5fc52>] del_conn+0x32/0x40 [bluetooth]
[40174.190118]  [<c013cd4f>] run_workqueue+0xbf/0x160
[40174.190146]  [<c013d7f0>] worker_thread+0x0/0xe0
[40174.190156]  [<c013d874>] worker_thread+0x84/0xe0
[40174.190168]  [<c0140b00>] autoremove_wake_function+0x0/0x40
[40174.190185]  [<c013d7f0>] worker_thread+0x0/0xe0
[40174.190193]  [<c0140842>] kthread+0x42/0x70
[40174.190198]  [<c0140800>] kthread+0x0/0x70
[40174.190208]  [<c0105667>] kernel_thread_helper+0x7/0x10
[40174.190231]  =======================
[40174.190234] Code: 43 04 8b 14 24 8b 30 85 d2 0f 95 44 24 07 eb 9b 8d b4 26 00 00 00 00 83 ec 0c 89 7c 24 08 89 c7 89 1c 24 89 74 24 04 8b 18 89 d8 <8b> 73 10 e8 a4 23 00 00 89 f8 e8 1d ff ff ff 83 f8 01 19 c0 f7 
[40174.190285] EIP: [<c031a044>] klist_del+0x14/0x50 SS:ESP 0068:f7c81f58
[40174.190294] ---[ end trace 7c5e59784978e223 ]---