syslog:

Apr 22 19:15:35 pegasus-jaunty kernel: [37586.356108] usb 2-1: new high speed USB device using ehci_hcd and address 7
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493027] general protection fault: 0000 [#1] SMP 
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493055] last sysfs file: /sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493063] Dumping ftrace buffer:
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493070]    (ftrace buffer empty)
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493076] CPU 0 
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493085] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat hidp binfmt_misc ppdev bridge stp bnep vboxnetflt vboxdrv input_polldev joydev netconsole configfs lp parport arc4 ecb snd_hda_intel snd_pcm_oss snd_mixer_oss iwlagn iwlcore snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq led_class snd_timer snd_seq_device mac80211 snd psmouse video sdhci_pci uvcvideo soundcore intel_agp btusb serio_raw pcspkr iTCO_wdt iTCO_vendor_support output sdhci dcdbas compat_ioctl32 videodev v4l1_compat snd_page_alloc cfg80211 nvidia(P) usbhid usb_storage ohci1394 ieee1394 sky2 fbcon tileblit font bitblit softcursor
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493329] Pid: 25, comm: khubd Tainted: P           2.6.28-11-generic #42-Ubuntu
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493337] RIP: 0010:[<ffffffff8041cc20>]  [<ffffffff8041cc20>] strcmp+0x10/0x40
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493357] RSP: 0018:ffff88011f091bc0  EFLAGS: 00010246
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493363] RAX: 0000000000000001 RBX: ffff880000000000 RCX: 0000000000000032
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493371] RDX: 0000000000000000 RSI: ffff88011d86dfa8 RDI: f000ec62f000ed90
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493379] RBP: ffff88011f091bc0 R08: 0000000000000001 R09: ffff88011f091af0
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493385] R10: 0000000000000003 R11: ffff88011f091cb0 R12: ffff88011d86dfa8
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493391] R13: ffff88011d731c30 R14: ffff88011f80a140 R15: 0000000000000001
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493399] FS:  0000000000000000(0000) GS:ffffffff80aa3000(0000) knlGS:0000000000000000
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493407] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493413] CR2: 00000000f0896000 CR3: 0000000000201000 CR4: 00000000000006a0
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493419] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493426] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493434] Process khubd (pid: 25, threadinfo ffff88011f090000, task ffff88011f088000)
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493440] Stack:
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493445]  ffff88011f091be0 ffffffff8034821d ffff88011d731c30 ffff88011f091c30
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493461]  ffff88011f091c00 ffffffff80348319 ffff88011f091c30 ffff88011d731c30
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493490]  ffff88011f091c20 ffffffff80348509 ffff88011f091c30 00000000fffffffe
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493513] Call Trace:
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493518]  [<ffffffff8034821d>] sysfs_find_dirent+0x2d/0x40
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493530]  [<ffffffff80348319>] __sysfs_add_one+0x19/0xb0
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493541]  [<ffffffff80348509>] sysfs_add_one+0x19/0x50
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493554]  [<ffffffff8034955b>] sysfs_do_create_link+0x10b/0x160
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493566]  [<ffffffff803495ce>] sysfs_create_link+0xe/0x10
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493577]  [<ffffffff804b7364>] device_add+0x214/0x480
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493590]  [<ffffffff80531af0>] ? usb_autopm_do_device+0xc0/0x110
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493602]  [<ffffffff8052a61a>] usb_new_device+0x6a/0xc0
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493614]  [<ffffffff8052b108>] hub_port_connect_change+0x4f8/0xab0
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493627]  [<ffffffff8052bac3>] hub_events+0x2e3/0x670
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493637]  [<ffffffff8022f669>] ? default_spin_lock_flags+0x9/0x10
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493653]  [<ffffffff8052be8d>] hub_thread+0x3d/0x180
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493663]  [<ffffffff80268930>] ? autoremove_wake_function+0x0/0x40
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493677]  [<ffffffff8052be50>] ? hub_thread+0x0/0x180
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493687]  [<ffffffff802684c9>] kthread+0x49/0x90
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493699]  [<ffffffff80213979>] child_rip+0xa/0x11
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493710]  [<ffffffff80268480>] ? kthread+0x0/0x90
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493720]  [<ffffffff8021396f>] ? child_rip+0x0/0x11
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493729] Code: c0 01 48 83 c1 01 4c 39 c2 75 e8 c6 01 00 48 89 f8 c9 c3 0f 1f 84 00 00 00 00 00 55 31 d2 48 89 e5 66 2e 0f 1f 84 00 00 00 00 00 <0f> b6 0c 17 89 c8 2a 04 16 84 c0 75 13 48 83 c2 01 84 c9 75 eb 
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493924] RIP  [<ffffffff8041cc20>] strcmp+0x10/0x40
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493941]  RSP <ffff88011f091bc0>
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.494110] ---[ end trace 20372e882c93d704 ]---



message log:

Apr 22 19:15:35 pegasus-jaunty kernel: [37586.356108] usb 2-1: new high speed USB device using ehci_hcd and address 7
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493063] Dumping ftrace buffer:
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493070]    (ftrace buffer empty)
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493076] CPU 0 
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493085] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat hidp binfmt_misc ppdev bridge stp bnep vboxnetflt vboxdrv input_polldev joydev netconsole configfs lp parport arc4 ecb snd_hda_intel snd_pcm_oss snd_mixer_oss iwlagn iwlcore snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq led_class snd_timer snd_seq_device mac80211 snd psmouse video sdhci_pci uvcvideo soundcore intel_agp btusb serio_raw pcspkr iTCO_wdt iTCO_vendor_support output sdhci dcdbas compat_ioctl32 videodev v4l1_compat snd_page_alloc cfg80211 nvidia(P) usbhid usb_storage ohci1394 ieee1394 sky2 fbcon tileblit font bitblit softcursor
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493329] Pid: 25, comm: khubd Tainted: P           2.6.28-11-generic #42-Ubuntu
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493337] RIP: 0010:[<ffffffff8041cc20>]  [<ffffffff8041cc20>] strcmp+0x10/0x40
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493357] RSP: 0018:ffff88011f091bc0  EFLAGS: 00010246
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493363] RAX: 0000000000000001 RBX: ffff880000000000 RCX: 0000000000000032
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493371] RDX: 0000000000000000 RSI: ffff88011d86dfa8 RDI: f000ec62f000ed90
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493379] RBP: ffff88011f091bc0 R08: 0000000000000001 R09: ffff88011f091af0
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493385] R10: 0000000000000003 R11: ffff88011f091cb0 R12: ffff88011d86dfa8
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493391] R13: ffff88011d731c30 R14: ffff88011f80a140 R15: 0000000000000001
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493399] FS:  0000000000000000(0000) GS:ffffffff80aa3000(0000) knlGS:0000000000000000
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493407] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493413] CR2: 00000000f0896000 CR3: 0000000000201000 CR4: 00000000000006a0
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493419] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493426] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493434] Process khubd (pid: 25, threadinfo ffff88011f090000, task ffff88011f088000)
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493445]  ffff88011f091be0 ffffffff8034821d ffff88011d731c30 ffff88011f091c30
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.493941]  RSP <ffff88011f091bc0>
Apr 22 19:15:35 pegasus-jaunty kernel: [37586.494110] ---[ end trace 20372e882c93d704 ]---