BUG: unable to handle kernel NULL pointer dereference at 00000098
IP: [<c056f686>] mutex_lock+0x16/0x40
*pde = 053fd067 *pte = 00000000 
Oops: 0002 [#1] SMP 
last sysfs file: /sys/devices/virtual/block/ram9/uevent
Modules linked in: snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul binfmt_misc snd_wavefront snd_emu10k1 snd_cs4236 snd_ac97_codec ac97_bus snd_wss_lib snd_pcm_oss snd_opl3_lib snd_mixer_oss snd_mpu401 snd_pcm snd_mpu401_uart snd_page_alloc snd_seq_dummy snd_util_mem bttv snd_hwdep ir_common i2c_algo_bit v4l2_common snd_seq_oss snd_seq_midi videodev snd_rawmidi v4l1_compat snd_seq_midi_event videobuf_dma_sg snd_seq videobuf_core snd_timer iptable_filter btcx_risc usblp ip_tables snd_seq_device ppdev emu10k1_gp tveeprom x_tables psmouse snd nvidia(P) serio_raw parport_pc shpchp soundcore i2c_nforce2 ns558 gameport lp parport usb_storage usbhid skge ohci1394 ieee1394 forcedeth floppy nvidia_agp agpgart

Pid: 20964, comm: cc1 Tainted: P           (2.6.31-14-generic #48-Ubuntu) A7N8X-E
EIP: 0060:[<c056f686>] EFLAGS: 00210246 CPU: 0
EIP is at mutex_lock+0x16/0x40
EAX: 00000098 EBX: 00000098 ECX: 00000001 EDX: 00000000
ESI: 00000020 EDI: c7cb8100 EBP: ccce9e54 ESP: ccce9e4c
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process cc1 (pid: 20964, ti=ccce8000 task=f5800000 task.ti=ccce8000)
Stack:
 ccce9ecc 00000020 ccce9e90 c01b51c6 ccce9e84 c01b793d 000280da 00000000
<0> 00000001 ccce9f50 00000000 00004f07 e9d755c8 00000098 ccce9ecc ccce9f50
<0> c7cb8100 ccce9ebc c025f20c 00004f07 00000000 00000000 00000000 e9d74490
Call Trace:
 [<c01b51c6>] ? generic_file_aio_write+0x46/0xd0
 [<c01b793d>] ? prep_new_page+0xad/0x120
 [<c025f20c>] ? ext4_file_write+0x4c/0x180
 [<c01e71bc>] ? do_sync_write+0xbc/0x100
 [<c01bbd0c>] ? lru_cache_add_lru+0x1c/0x40
 [<c015c280>] ? autoremove_wake_function+0x0/0x40
 [<c02c7acf>] ? security_file_permission+0xf/0x20
 [<c01e735f>] ? rw_verify_area+0x5f/0xe0
 [<c01cc460>] ? handle_mm_fault+0x330/0x380
 [<c01e747a>] ? vfs_write+0x9a/0x190
 [<c01e7100>] ? do_sync_write+0x0/0x100
 [<c0572d4b>] ? do_page_fault+0x19b/0x380
 [<c01e7f3d>] ? sys_write+0x3d/0x70
 [<c010336c>] ? syscall_call+0x7/0xb
Code: 71 fe ff ff 85 c0 75 f2 eb e4 8d 74 26 00 8d bc 27 00 00 00 00 55 89 e5 83 ec 08 89 1c 24 89 c3 89 74 24 04 e8 9c f6 ff ff 89 d8 <3e> ff 08 79 05 e8 20 00 00 00 89 e0 8b 74 24 04 25 00 e0 ff ff 
EIP: [<c056f686>] mutex_lock+0x16/0x40 SS:ESP 0068:ccce9e4c
CR2: 0000000000000098
---[ end trace a0ef23fb75a70d20 ]---