BUG: unable to handle kernel NULL pointer dereference at 00000000000000f0
IP: [<ffffffff8103db09>] __ticket_spin_lock+0x9/0x30
PGD a6604067 PUD a6606067 PMD 0 
Oops: 0002 [#1] SMP 
CPU 0 
Modules linked in: nls_iso8859_1 nls_cp437 vfat fat bnep rfcomm bluetooth parport_pc ppdev snd_hda_codec_hdmi snd_hda_codec_realtek joydev snd_hda_intel snd_hda_codec uvcvideo videodev v4l2_compat_ioctl32 snd_hwdep snd_pcm i915 snd_seq_midi bcma arc4 snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore snd_page_alloc drm_kms_helper psmouse brcmsmac mac80211 brcmutil cfg80211 serio_raw crc8 drm i2c_algo_bit cordic acer_wmi mxm_wmi sparse_keymap wmi video mac_hid lp parport ums_realtek uas tg3 usb_storage

Pid: 1661, comm: gvfsd-trash Not tainted 3.2.0-17-generic #27-Ubuntu Acer Aspire 5736Z/JE51_MV
RIP: 0010:[<ffffffff8103db09>]  [<ffffffff8103db09>] __ticket_spin_lock+0x9/0x30
RSP: 0018:ffff8800a662fe18  EFLAGS: 00010206
RAX: 0000000000010000 RBX: 00000000000000f0 RCX: ffff8800bb96a000
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 00000000000000f0
RBP: ffff8800a662fe18 R08: e000000000000000 R09: 5038000000000000
R10: ff3698e731b4ea07 R11: 0000000000000202 R12: ffff8800ab674310
R13: ffff8800ab674408 R14: ffff8800b3b05664 R15: ffff8800ab674310
FS:  00007f56f49157c0(0000) GS:ffff8800bb600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000f0 CR3: 00000000a65d3000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process gvfsd-trash (pid: 1661, threadinfo ffff8800a662e000, task ffff8800b2bbc4a0)
Stack:
 ffff8800a662fe28 ffffffff81658c1e ffff8800a662fe48 ffffffffa0447462
 ffff8800ab674310 ffff8800ab674310 ffff8800a662fe68 ffffffffa0447bcb
 ffff8800a662fe68 ffffffffa044b6c0 ffff8800a662fe98 ffffffff811919b8
Call Trace:
 [<ffffffff81658c1e>] _raw_spin_lock+0xe/0x20
 [<ffffffffa0447462>] fat_detach+0x32/0x80 [fat]
 [<ffffffffa0447bcb>] fat_evict_inode+0x5b/0x70 [fat]
 [<ffffffff811919b8>] evict+0xb8/0x1c0
 [<ffffffff81191ba8>] iput_final+0xe8/0x210
 [<ffffffff81191d0e>] iput+0x3e/0x50
 [<ffffffff811b6df0>] fsnotify_destroy_mark+0x170/0x180
 [<ffffffff811b8dea>] sys_inotify_rm_watch+0x7a/0xd0
 [<ffffffff81661202>] system_call_fastpath+0x16/0x1b
Code: 00 00 48 c7 c1 11 d9 03 81 48 c7 c2 0e d9 03 81 e9 dd fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 55 b8 00 00 01 00 48 89 e5 <f0> 0f c1 07 89 c2 c1 ea 10 66 39 c2 74 13 66 0f 1f 84 00 00 00 
RIP  [<ffffffff8103db09>] __ticket_spin_lock+0x9/0x30
 RSP <ffff8800a662fe18>
CR2: 00000000000000f0
---[ end trace f594b4789cf647a5 ]---