BUG: unable to handle kernel NULL pointer dereference at 000000000000000c
IP: [<ffffffff810f55e1>] valid_swaphandles+0x71/0x130
PGD 4b53d067 PUD 4b6ff067 PMD 0
Oops: 0000 [#1] SMP
CPU 0
Modules linked in: hidp acpi_cpufreq mperf cpufreq_stats cpufreq_powersave rfcomm bnep microcode uinput fuse sbs sbshc coretemp i2c_dev loop uvcvideo videodev v4l2_compat_ioctl32 firewire_sbp2 aes_x86_64 aes_generic ecb btusb bluetooth hid_apple usbhid hid appletouch isight_firmware sg sr_mod cdrom arc4 uhci_hcd ehci_hcd b43 usbcore i2c_i801 evdev snd_hda_codec_realtek mac80211 cfg80211 rfkill snd_hda_intel rng_core snd_hda_codec battery ssb snd_hwdep firewire_ohci snd_pcm mmc_core firewire_core crc_itu_t snd_seq snd_timer snd_seq_device snd soundcore snd_page_alloc applesmc input_polldev pcspkr ac processor apple_bl power_supply sky2 ext4 mbcache jbd2 crc16 sd_mod crc_t10dif ata_piix libata scsi_mod
Nov 11 01:32:24 wensbook kernel:
Pid: 13697, comm: firefox-bin Not tainted 3.1.0.git2+ #27 Apple Inc. MacBook4,1/Mac-F22788A9
RIP: 0010:[<ffffffff810f55e1>]  [<ffffffff810f55e1>] valid_swaphandles+0x71/0x130
RSP: 0000:ffff880054229cb8  EFLAGS: 00010246
RAX: 0000000000007d7d RBX: 0000000000000000 RCX: 0000000000000003
RDX: 0000000000000001 RSI: ffff880054229d20 RDI: ffffffff81772b30
RBP: ffff880054229cf8 R08: 0000000000000000 R09: 0000000000000028
R10: ffff880076f31360 R11: 2000000080000000 R12: 0000000080000000
R13: 0000000080000000 R14: 0000000000000000 R15: ffff880054229d20
FS:  00007faed45fe700(0000) GS:ffff88007da00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000000c CR3: 0000000037d1f000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process firefox-bin (pid: 13697, threadinfo ffff880054228000, task ffff880054206980)
Stack:
ffffea0000cc53f0 0000000080000008 ffff88007a54ab00 00000000000200da
ffff880061b6b7c8 00007faf0d9a5bef ffff88007a54ab00 00007faf0d9a5bef
ffff880054229d58 ffffffff810f2166 ffff880054229d58 2000000080000000
Call Trace:
[<ffffffff810f2166>] swapin_readahead+0x26/0xb0
[<ffffffff811af74e>] ? radix_tree_lookup_slot+0xe/0x10
[<ffffffff810e2e0f>] handle_pte_fault+0x65f/0x930
[<ffffffff8132ce19>] ? __ip_route_output_key+0x4c9/0x970
[<ffffffff810e33d7>] handle_mm_fault+0x1b7/0x2c0
[<ffffffff813d4cbd>] do_page_fault+0x11d/0x4e0
[<ffffffff8111d522>] ? d_kill+0xd2/0x130
[<ffffffff81124a2f>] ? mntput_no_expire+0x1f/0xf0
[<ffffffff81124b1a>] ? mntput+0x1a/0x30
[<ffffffff81109f0f>] ? fput+0x16f/0x210
[<ffffffff813d1e2f>] page_fault+0x1f/0x30
Code: 34 c5 40 2b 77 81 4d 89 ec b8 01 00 00 00 49 d3 ec d3 e0 49 d3 e4 48 98 4c 01 e0 4d 85 e4 4c 0f 44 e2 48 89 45 c8 e8 9f c4 2d 00
RIP  [<ffffffff810f55e1>] valid_swaphandles+0x71/0x130
RSP <ffff880054229cb8>
CR2: 000000000000000c
---[ end trace 55973eaf7551e3c0 ]---