BUG: unable to handle kernel paging request at 4e880101
IP: [<c056f73a>] __mutex_lock_slowpath+0x8a/0x130
*pde = 00000000 
Oops: 0002 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:14.1/host1/target1:0:0/1:0:0:0/block/sda/sda1/stat
Modules linked in: cdc_acm nls_utf8 isofs snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_hda_intel binfmt_misc ppdev bridge stp bnep snd_hda_codec_si3054 snd_hda_codec_realtek snd_hda_codec snd_hwdep snd_pcm dm_crypt arc4 pcmcia ecb iptable_filter yenta_socket snd_timer ip_tables sdhci_pci lp zd1211rw rsrc_nonstatic psmouse asus_laptop x_tables sdhci parport mac80211 pcmcia_core joydev shpchp btusb i2c_piix4 serio_raw led_class snd cfg80211 soundcore snd_page_alloc usbhid dm_raid45 xor 8139too 8139cp mii radeon ttm drm i2c_algo_bit video output ati_agp agpgart [last unloaded: snd_seq_device]

Pid: 14614, comm: wammu Not tainted (2.6.31-14-generic #48-Ubuntu) A9Rp                
EIP: 0060:[<c056f73a>] EFLAGS: 00010246 CPU: 0
EIP is at __mutex_lock_slowpath+0x8a/0x130
EAX: 4e880101 EBX: de7bfebc ECX: de7bfec4 EDX: d871dcfc
ESI: de7bfec0 EDI: de7bfecc EBP: d871dd14 ESP: d871dcf0
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process wammu (pid: 14614, ti=d871c000 task=ecf5f110 task.ti=d871c000)
Stack:
 205bb000 de7bfec4 ecf5f110 de7bfec4 4e880101 f5dbb000 de7bfebc de7bfc00
<0> 00000001 d871dd24 c056f690 d85c4b00 de7bfc00 d871dd3c c0414c69 de7bfebc
<0> c708f000 00000010 00000000 d871dd44 c0414d4d d871dd64 f80bbe4f c06eb19c
Call Trace:
 [<c056f690>] ? mutex_lock+0x20/0x40
 [<c0414c69>] ? usb_autopm_do_interface+0x29/0xf0
 [<c0414d4d>] ? usb_autopm_get_interface+0xd/0x10
 [<f80bbe4f>] ? T.558+0x2f/0xc0 [cdc_acm]
 [<f80bbf27>] ? acm_tty_close+0x47/0x90 [cdc_acm]
 [<c037f6c0>] ? tty_release_dev+0x120/0x500
 [<c01b33fd>] ? generic_file_buffered_write+0x5d/0x150
 [<c01dc4aa>] ? shmem_get_acl+0x3a/0x70
 [<c056f684>] ? mutex_lock+0x14/0x40
 [<f80bc164>] ? acm_tty_open+0xa4/0x270 [cdc_acm]
 [<c05708b8>] ? _spin_lock+0x8/0x10
 [<c0380ca1>] ? __tty_open+0x401/0x460
 [<c0380d1f>] ? tty_open+0x1f/0x40
 [<c01ea5bd>] ? chrdev_open+0xcd/0x190
 [<c01e5769>] ? __dentry_open+0xb9/0x230
 [<c01e59c5>] ? nameidata_to_filp+0x55/0x70
 [<c01ea4f0>] ? chrdev_open+0x0/0x190
 [<c01f34fa>] ? do_filp_open+0x53a/0x890
 [<c01e5500>] ? do_sys_open+0x50/0x150
 [<c01e7100>] ? do_sync_write+0x0/0x100
 [<c01e5669>] ? sys_open+0x29/0x40
 [<c010336c>] ? syscall_call+0x7/0xb
Code: 18 63 7f bd 90 8d 74 26 00 8d 73 04 89 f0 e8 8e 11 00 00 8d 55 e8 8d 43 08 89 45 e0 8b 43 0c 89 53 0c 8b 4d e0 89 45 ec 89 4d e8 <89> 10 8b 45 e4 ba ff ff ff ff 89 45 f0 89 d0 87 03 83 f8 01 74 
EIP: [<c056f73a>] __mutex_lock_slowpath+0x8a/0x130 SS:ESP 0068:d871dcf0
CR2: 000000004e880101
---[ end trace b47aeee387c2e3e6 ]---