From kern.log:

Nov  8 08:45:35 neo kernel: [  945.750560] BUG: unable to handle kernel paging request at 000024b3
Nov  8 08:45:35 neo kernel: [  945.750586] IP: [<c020cb7c>] __kmalloc_track_caller+0x6c/0x170
Nov  8 08:45:35 neo kernel: [  945.750617] *pde = afa3b067 
Nov  8 08:45:35 neo kernel: [  945.750628] Oops: 0000 [#1] SMP 
Nov  8 08:45:35 neo kernel: [  945.750641] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0/charge_full
Nov  8 08:45:35 neo kernel: [  945.750653] Modules linked in: parport_pc ppdev snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq radeon ttm drm_kms_helper pcmcia snd_timer snd_seq_device joydev lib80211_crypt_tkip dell_wmi dell_laptop drm dcdbas wl(P) yenta_socket snd psmouse pcmcia_rsrc ati_agp serio_raw pcmcia_core hid_ntrig i2c_algo_bit soundcore i2c_piix4 snd_page_alloc video agpgart shpchp lib80211 output lp parport sdhci_pci sdhci firewire_ohci usbhid hid firewire_core tg3 led_class crc_itu_t pata_atiixp
Nov  8 08:45:35 neo kernel: [  945.750830] 
Nov  8 08:45:35 neo kernel: [  945.750842] Pid: 1667, comm: threaded-ml Tainted: P            2.6.35-22-generic #35-Ubuntu 0Y041C/Latitude XT                     
Nov  8 08:45:35 neo kernel: [  945.750855] EIP: 0060:[<c020cb7c>] EFLAGS: 00010002 CPU: 1
Nov  8 08:45:35 neo kernel: [  945.750870] EIP is at __kmalloc_track_caller+0x6c/0x170
Nov  8 08:45:35 neo kernel: [  945.750879] EAX: c2e05af8 EBX: c07c6910 ECX: c07c6910 EDX: 00000000
Nov  8 08:45:35 neo kernel: [  945.750890] ESI: 000004d0 EDI: 000024b3 EBP: f174fcec ESP: f174fcc4
Nov  8 08:45:35 neo kernel: [  945.750900]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Nov  8 08:45:35 neo kernel: [  945.750911] Process threaded-ml (pid: 1667, ti=f174e000 task=f169e580 task.ti=f174e000)
Nov  8 08:45:35 neo kernel: [  945.750919] Stack:
Nov  8 08:45:35 neo kernel: [  945.750924]  00000001 00000001 c04ece5e c04e9814 00000246 000004d0 00000304 f6aac300
Nov  8 08:45:35 neo kernel: [  945.750952] <0> 000004d0 0000023f f174fd0c c04ece88 c07c64d0 00000000 00000200 f1f8d680
Nov  8 08:45:35 neo kernel: [  945.750982] <0> 00000000 f169e580 f174fd50 c04e9814 ffffffff 00000200 f1f8d76c 000004d0
Nov  8 08:45:35 neo kernel: [  945.751013] Call Trace:
Nov  8 08:45:35 neo kernel: [  945.751032]  [<c04ece5e>] ? __alloc_skb+0x2e/0x100
Nov  8 08:45:35 neo kernel: [  945.751046]  [<c04e9814>] ? sock_alloc_send_pskb+0x164/0x290
Nov  8 08:45:35 neo kernel: [  945.751062]  [<c04ece88>] ? __alloc_skb+0x58/0x100
Nov  8 08:45:35 neo kernel: [  945.751075]  [<c04e9814>] ? sock_alloc_send_pskb+0x164/0x290
Nov  8 08:45:35 neo kernel: [  945.751094]  [<c012ce18>] ? default_spin_lock_flags+0x8/0x10
Nov  8 08:45:35 neo kernel: [  945.751111]  [<c05c8c0f>] ? _raw_spin_lock_irqsave+0x2f/0x50
Nov  8 08:45:35 neo kernel: [  945.751124]  [<c04e995d>] ? sock_alloc_send_skb+0x1d/0x30
Nov  8 08:45:35 neo kernel: [  945.751141]  [<c056fee3>] ? unix_stream_sendmsg+0x223/0x370
Nov  8 08:45:35 neo kernel: [  945.751155]  [<c04e7479>] ? sock_sendmsg+0xd9/0x100
Nov  8 08:45:35 neo kernel: [  945.751171]  [<c01512cc>] ? __do_softirq+0xec/0x1b0
Nov  8 08:45:35 neo kernel: [  945.751184]  [<c0108a28>] ? sched_clock+0x8/0x10
Nov  8 08:45:35 neo kernel: [  945.751197]  [<c0151519>] ? irq_exit+0x39/0x70
Nov  8 08:45:35 neo kernel: [  945.751212]  [<c05cf79b>] ? smp_apic_timer_interrupt+0x5b/0x8a
Nov  8 08:45:35 neo kernel: [  945.751225]  [<c014ff8b>] ? current_fs_time+0x1b/0x20
Nov  8 08:45:35 neo kernel: [  945.751238]  [<c04e75e5>] ? sys_sendto+0xf5/0x140
Nov  8 08:45:35 neo kernel: [  945.751256]  [<c0139665>] ? update_curr+0x175/0x2a0
Nov  8 08:45:35 neo kernel: [  945.751272]  [<c016bf14>] ? sched_clock_local+0xa4/0x180
Nov  8 08:45:35 neo kernel: [  945.751286]  [<c0139cb6>] ? __dequeue_entity+0x26/0x50
Nov  8 08:45:35 neo kernel: [  945.751298]  [<c0101add>] ? __switch_to+0xcd/0x180
Nov  8 08:45:35 neo kernel: [  945.751313]  [<c04e766b>] ? sys_send+0x3b/0x40
Nov  8 08:45:35 neo kernel: [  945.751326]  [<c04e8230>] ? sys_socketcall+0x1e0/0x2a0
Nov  8 08:45:35 neo kernel: [  945.751343]  [<c035a269>] ? copy_to_user+0x39/0x130
Nov  8 08:45:35 neo kernel: [  945.751356]  [<c0164af0>] ? sys_clock_gettime+0x50/0xa0
Nov  8 08:45:35 neo kernel: [  945.751368]  [<c05c9114>] ? syscall_call+0x7/0xb
Nov  8 08:45:35 neo kernel: [  945.751385]  [<c05c0000>] ? cpu_init+0x207/0x249
Nov  8 08:45:35 neo kernel: [  945.751392] Code: ec 75 5c 9c 58 8d 74 26 00 89 45 e8 fa 90 8d 74 26 00 64 8b 15 54 e0 8b c0 8b 03 8d 04 02 8b 38 85 ff 0f 84 99 00 00 00 8b 53 10 <8b> 14 17 89 10 8b 45 e8 50 9d 8d 74 26 00 85 ff 75 2a 8b 0d e4 
Nov  8 08:45:35 neo kernel: [  945.751557] EIP: [<c020cb7c>] __kmalloc_track_caller+0x6c/0x170 SS:ESP 0068:f174fcc4
Nov  8 08:45:35 neo kernel: [  945.751577] CR2: 00000000000024b3
Nov  8 08:45:35 neo kernel: [  945.751588] ---[ end trace 3a80266559cc9a14 ]---