Comment 5 for bug 426870

I have the same error as in the title, but absolutely no idea what triggers it. It happens once in about 10-15-20 days. The simptoms are high load (it rises to about 10), but no cpu or disk activity; gnom-terminal is freezes, but other things are reasonably useable.
I use the latest kernel in karmic:
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[gab0r@asus-lapi ~]$ uname -a
Linux asus-lapi 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 16:20:31 UTC 2009 i686 GNU/Linux
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snippet from syslog:
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Jan 18 16:28:46 asus-lapi kernel: [492310.041650] device eth0 left promiscuous mode
Jan 18 16:29:03 asus-lapi kernel: [492326.551836] BUG: unable to handle kernel NULL pointer dereference at 00000004
Jan 18 16:29:03 asus-lapi kernel: [492326.551850] IP: [<c0127b28>] __ticket_spin_lock+0x8/0x20
Jan 18 16:29:03 asus-lapi kernel: [492326.551868] *pde = 5e48d067
Jan 18 16:29:03 asus-lapi kernel: [492326.551875] Oops: 0002 [#1] SMP
Jan 18 16:29:03 asus-lapi kernel: [492326.551883] last sysfs file: /sys/devices/pci0000:00/0000:00:1f.1/host0/target0:0:0/0:0:0:0/block/sda/sda1/stat
Jan 18 16:29:03 asus-lapi kernel: [492326.551892] Modules linked in: mmc_block nls_iso8859_1 nls_cp437 vfat fat ipaq usbserial usb_storage binfmt_misc vboxnetadp vboxnetflt vboxdrv smsc_ircc2 joydev snd_hda_codec_realtek bridge stp bnep btusb snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy iptable_filter snd_seq_oss pcmcia ip_tables x_tables snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device ppdev psmouse serio_raw libipw lib80211 sdhci_pci sdhci yenta_socket rsrc_nonstatic pcmcia_core snd irda crc_ccitt soundcore snd_page_alloc parport_pc lp parport asus_laptop led_class dm_raid45 xor usbhid skge ohci1394 ieee1394 radeon ttm drm i2c_algo_bit video output intel_agp agpgart [last unloaded: ipw2200]
Jan 18 16:29:03 asus-lapi kernel: [492326.552011]
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] Pid: 6, comm: events/0 Tainted: G M (2.6.31-17-generic #54-Ubuntu) M6VA
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] EIP: 0060:[<c0127b28>] EFLAGS: 00010202 CPU: 0
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] EIP is at __ticket_spin_lock+0x8/0x20
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] EAX: 00000004 EBX: f7065f48 ECX: c1cbeba4 EDX: 00000100
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] ESI: f07544bc EDI: c1cbeba0 EBP: f7065f1c ESP: f7065f1c
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] Process events/0 (pid: 6, ti=f7064000 task=f704bed0 task.ti=f7064000)
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] Stack:
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] f7065f24 c0570dc8 f7065f2c faf305de f7065f58 faeda21d 00000000 f7065f48
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] <0> f7065f8c c056ee8c f0754410 00000000 f07544bc c1cbeba0 c1cbeba0 f7065f8c
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] <0> c01579ce c08145c0 f704c168 c08145c0 a4a2cba8 0001bfc4 c08145c0 c1cbeba4
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] Call Trace:
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c0570dc8>] ? _spin_lock+0x8/0x10
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<faf305de>] ? RTSpinlockAcquire+0xe/0x10 [vboxdrv]
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<faeda21d>] ? vboxNetFltLinuxXmitTask+0x2d/0x1d0 [vboxnetflt]
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c056ee8c>] ? schedule+0x40c/0x730
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c01579ce>] ? run_workqueue+0x6e/0x140
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<faeda1f0>] ? vboxNetFltLinuxXmitTask+0x0/0x1d0 [vboxnetflt]
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c0157b28>] ? worker_thread+0x88/0xe0
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c015c170>] ? autoremove_wake_function+0x0/0x40
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c0157aa0>] ? worker_thread+0x0/0xe0
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c015be7c>] ? kthread+0x7c/0x90
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c015be00>] ? kthread+0x0/0x90
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] [<c0104007>] ? kernel_thread_helper+0x7/0x10
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] Code: ff ff 90 b9 da 79 12 c0 b8 dd 79 12 c0 e9 59 ff ff ff 90 b9 e0 79 12 c0 b8 e3 79 12 c0 e9 49 ff ff ff 90 55 ba 00 01 00 00 89 e5 <3e> 66 0f c1 10 38 f2 74 06 f3 90 8a 10 eb f6 5d c3 8d b4 26 00
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] EIP: [<c0127b28>] __ticket_spin_lock+0x8/0x20 SS:ESP 0068:f7065f1c
Jan 18 16:29:03 asus-lapi kernel: [492326.552011] CR2: 0000000000000004
Jan 18 16:29:03 asus-lapi kernel: [492326.552431] ---[ end trace 09fd58067f818053 ]---
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The machine is an Asus M6VA laptop:
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[gab0r@asus-lapi ~]$ lspci
00:00.0 Host bridge: Intel Corporation Mobile 915GM/PM/GMS/910GML Express Processor to DRAM Controller (rev 04)
00:01.0 PCI bridge: Intel Corporation Mobile 915GM/PM Express PCI Express Root Port (rev 04)
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 04)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 (rev 04)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 (rev 04)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 (rev 04)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 (rev 04)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller (rev 04)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev d4)
00:1f.0 ISA bridge: Intel Corporation 82801FBM (ICH6M) LPC Interface Bridge (rev 04)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) IDE Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus Controller (rev 04)
01:00.0 VGA compatible controller: ATI Technologies Inc M26 [Radeon Mobility X700]
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8001 Gigabit Ethernet Controller (rev 13)
02:01.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev b3)
02:01.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C552 IEEE 1394 Controller (rev 08)
02:01.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 17)
02:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 08)
02:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 03)
02:02.0 Network controller: Intel Corporation PRO/Wireless 2915ABG [Calexico2] Network Connection (rev 05)
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Hope I could provide some usable information.
Sorry for my english...