BUG: unable to handle kernel NULL pointer dereference at 00000000000000f0
IP: [<ffffffff8103cb09>] __ticket_spin_lock+0x9/0x30
PGD 12c149067 PUD 12c148067 PMD 0 
Oops: 0002 [#1] SMP 
CPU 1 
Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos xfs reiserfs jfs ext2 parport_pc ppdev dm_crypt lp parport snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep arc4 snd_pcm ath9k mac80211 snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq ath9k_common snd_timer uvcvideo snd_seq_device btusb ath9k_hw snd videodev v4l2_compat_ioctl32 ath acer_wmi soundcore mei(C) joydev bnep psmouse mac_hid intel_ips snd_page_alloc dm_multipath serio_raw cfg80211 rfcomm sparse_keymap bluetooth squashfs overlayfs nls_utf8 isofs nls_iso8859_1 nls_cp437 vfat fat dm_raid45 xor dm_mirror dm_region_hash dm_log btrfs zlib_deflate libcrc32c wmi i915 tg3 drm_kms_helper usbhid hid drm i2c_algo_bit video

Pid: 8581, comm: gvfsd-trash Tainted: G         C   3.2.0-15-generic #24-Ubuntu Acer Aspire 4738/JE41_CP
RIP: 0010:[<ffffffff8103cb09>]  [<ffffffff8103cb09>] __ticket_spin_lock+0x9/0x30
RSP: 0018:ffff88012c161e18  EFLAGS: 00010206
RAX: 0000000000010000 RBX: 00000000000000f0 RCX: ffff880137fca000
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 00000000000000f0
RBP: ffff88012c161e18 R08: e000000000000000 R09: d038000000000000
R10: ff3ca3cb6efb7a07 R11: 0000000000000001 R12: ffff8800a55c5d50
R13: ffff8800a55c5e48 R14: ffff88009c465964 R15: ffff8800a55c5d50
FS:  00007f55244577c0(0000) GS:ffff880137c40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000f0 CR3: 000000012e2a1000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process gvfsd-trash (pid: 8581, threadinfo ffff88012c160000, task ffff88012dfaadc0)
Stack:
 ffff88012c161e28 ffffffff8165765e ffff88012c161e48 ffffffffa0214462
 ffff8800a55c5d50 ffff8800a55c5d50 ffff88012c161e68 ffffffffa0214bcb
 ffff88012c161e68 ffffffffa02186c0 ffff88012c161e98 ffffffff81190878
Call Trace:
 [<ffffffff8165765e>] _raw_spin_lock+0xe/0x20
 [<ffffffffa0214462>] fat_detach+0x32/0x80 [fat]
 [<ffffffffa0214bcb>] fat_evict_inode+0x5b/0x70 [fat]
 [<ffffffff81190878>] evict+0xb8/0x1c0
 [<ffffffff81190a68>] iput_final+0xe8/0x210
 [<ffffffff81190bce>] iput+0x3e/0x50
 [<ffffffff811b5cb0>] fsnotify_destroy_mark+0x170/0x180
 [<ffffffff811b7caa>] sys_inotify_rm_watch+0x7a/0xd0
 [<ffffffff8165fc02>] system_call_fastpath+0x16/0x1b
Code: 00 00 48 c7 c1 11 c9 03 81 48 c7 c2 0e c9 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  [<ffffffff8103cb09>] __ticket_spin_lock+0x9/0x30
 RSP <ffff88012c161e18>
CR2: 00000000000000f0
---[ end trace 6a31654b736c88e0 ]---