BUG: unable to handle kernel NULL pointer dereference at 0000009c
IP: [<c10363a8>] __ticket_spin_lock+0x8/0x30
*pdpt = 000000002f65b001 *pde = 0000000000000000 
Oops: 0002 [#1] SMP 
Modules linked in: nls_iso8859_1 nls_cp437 vfat fat usb_storage uas dm_crypt bnep bluetooth snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_usb_audio snd_pcm uvcvideo videodev snd_hwdep snd_usbmidi_lib snd_seq_midi snd_seq_midi_event snd_seq snd_rawmidi ppdev snd_timer snd_seq_device snd parport_pc soundcore snd_page_alloc mac_hid lp parport usbhid hid i915 drm_kms_helper drm r8169 i2c_algo_bit video floppy

Pid: 1746, comm: gvfsd-trash Not tainted 3.2.0-21-generic-pae #34-Ubuntu Gigabyte Technology Co., Ltd. G31M-ES2L /G31M-ES2L
EIP: 0060:[<c10363a8>] EFLAGS: 00210206 CPU: 0
EIP is at __ticket_spin_lock+0x8/0x30
EAX: 0000009c EBX: edb5e1e0 ECX: 00000001 EDX: 00000100
ESI: 0000009c EDI: edb5e278 EBP: ef705f1c ESP: ef705f1c
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process gvfsd-trash (pid: 1746, ti=ef704000 task=ef6b25e0 task.ti=ef704000)
Stack:
 ef705f24 c15a757d ef705f34 f8d3f9f9 edb5e1e0 f8d433c0 ef705f40 f8d40066
 edb5e1e0 ef705f54 c115b8af edb5e1e0 edb5e22c de98a800 ef705f68 c115ba37
 edb5e1e0 d9733c94 ef63a6c0 ef705f74 c115bb4e d9733c80 ef705f94 c117ce50
Call Trace:
 [<c15a757d>] _raw_spin_lock+0xd/0x10
 [<f8d3f9f9>] fat_detach+0x29/0x70 [fat]
 [<f8d40066>] fat_evict_inode+0x56/0x60 [fat]
 [<c115b8af>] evict+0x8f/0x170
 [<c115ba37>] iput_final+0xa7/0x190
 [<c115bb4e>] iput+0x2e/0x40
 [<c117ce50>] fsnotify_destroy_mark+0x140/0x150
 [<c117e97a>] sys_inotify_rm_watch+0x5a/0x90
 [<c15ae99f>] sysenter_do_call+0x12/0x28
Code: ff ff 90 b8 5d 62 03 c1 b9 5a 62 03 c1 e9 59 ff ff ff 90 b8 63 62 03 c1 b9 60 62 03 c1 e9 49 ff ff ff 90 55 ba 00 01 00 00 89 e5 <3e> 66 0f c1 10 0f b6 ce 38 d1 74 0d 8d 74 26 00 f3 90 0f b6 10 
EIP: [<c10363a8>] __ticket_spin_lock+0x8/0x30 SS:ESP 0068:ef705f1c
CR2: 000000000000009c
---[ end trace 5ab3cc67c4c31157 ]---