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[Bug 1265684] Re: Kernel crash, appears related to ext4 and ecryptfs

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: "Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>
Date: Fri, 03 Jan 2014 02:29:48 -0000
Reply-to: Bug 1265684 <1265684@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Maarten Baert, thank you for reporting this and helping make Ubuntu
better. Just to confirm, this is not reproducible in Ubuntu at all, but
only in Arch, correct?

** Description changed:

- As requested by Christopher M. Penalver, I'm submitting a new bug report for the problem I mentioned here:
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258313
- 
  This problem is very similar, but happened with a different kernel (I
  was using Arch Linux): I am using firefox, I have encrypted my firefox
  profile folder with ecryptfs, and the underlying file system is ext4.
  While I was using firefox, the program became frozen and could not be
  killed. The 'htop' utility indicated that firefox and some other
  processes had status 'D', i.e. 'uninterruptible sleep'. My graphical
  session was still functional, and I could open a terminal and run
  'dmesg', but any attempt to save it to the hard disk would freeze bash
  (uninterruptible sleep, just like firefox). I was able to save the
  output on a different physical hard disk (i.e. not the one that was used
  by firefox and ecrypt). After that I tried to reboot, but this caused
  the kernel to lock up and required a hard reset.
  
  So far I have not been able to reproduce this issue, so I can only give
  a stack trace for Linux 3.12.6 (from Arch Linux):
  
  [42210.127535] ------------[ cut here ]------------
  [42210.127540] kernel BUG at fs/buffer.c:1278!
- [42210.127542] invalid opcode: 0000 [#1] PREEMPT SMP 
+ [42210.127542] invalid opcode: 0000 [#1] PREEMPT SMP
  [42210.127544] Modules linked in: md5 ecb ecryptfs cbc sha256_ssse3 sha256_generic encrypted_keys hmac trusted tpm tpm_bios snd_hda_codec_hdmi snd_hda_codec_realtek nls_cp437 vfat fat nvidia(PO) x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crct10dif_common crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd hid_logitech_dj iTCO_wdt iTCO_vendor_support mxm_wmi ip6t_REJECT microcode evdev xt_hl ip6t_rt snd_hda_intel snd_hda_codec drm snd_hwdep snd_pcm nf_conntrack_ipv6 e1000e nf_defrag_ipv6 snd_page_alloc i2c_i801 snd_timer snd psmouse ptp soundcore mei_me i2c_core pps_core shpchp mei lpc_ich ipt_REJECT serio_raw pcspkr xt_LOG xt_recent fan thermal xt_multiport xt_limit xt_tcpudp xt_addrtype wmi video processor button nf_conntrack_ipv4
  [42210.127583]  nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables ext4 crc16 mbcache jbd2 hid_generic usbhid hid sr_mod cdrom sd_mod ahci libahci libata ehci_pci xhci_hcd ehci_hcd scsi_mod usbcore usb_common
  [42210.127600] CPU: 0 PID: 7198 Comm: firefox Tainted: P           O 3.12.6-1-ARCH #1
  [42210.127601] Hardware name: Gigabyte Technology Co., Ltd. Z87X-D3H/Z87X-D3H-CF, BIOS F7 08/02/2013
  [42210.127603] task: ffff8802070c1a10 ti: ffff8800cad36000 task.ti: ffff8800cad36000
  [42210.127604] RIP: 0010:[<ffffffff811d6ab8>]  [<ffffffff811d6ab8>] __find_get_block+0x288/0x290
  [42210.127609] RSP: 0018:ffff8800cad375a0  EFLAGS: 00010046
  [42210.127610] RAX: 0000000000000092 RBX: ffff88009a0baaf8 RCX: ffff880222edc800
  [42210.127611] RDX: 0000000000001000 RSI: 0000000000d000bb RDI: ffff8800cd0f0700
  [42210.127613] RBP: ffff8800cad375f8 R08: 0000000000000003 R09: 0000000000000003
  [42210.127614] R10: ffff880222edc800 R11: ffffffffa0256a40 R12: ffff8800cd0f0700
  [42210.127615] R13: 0000000000001000 R14: ffff88022eb54400 R15: 0000000000000010
  [42210.127616] FS:  0000000000000000(0000) GS:ffff88022ec00000(0000) knlGS:0000000000000000
  [42210.127617] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [42210.127618] CR2: 00007fa7e5e00018 CR3: 000000000280d000 CR4: 00000000001407f0
  [42210.127619] Stack:
  [42210.127621]  ffffffff811d6f75 ffff8800cad375f0 ffffffff8109c074 ffff8800cad37fd8
  [42210.127624]  ffff880222deb000 0000000000d000bb ffff88009a0baaf8 ffff8800cad376b0
  [42210.127626]  ffff880222edc000 ffff88022eb54400 0000000000000010 ffff8800cad37660
  [42210.127628] Call Trace:
  [42210.127631]  [<ffffffff811d6f75>] ? __getblk+0x25/0x2e0
  [42210.127636]  [<ffffffff8109c074>] ? dequeue_entity+0x144/0x4d0
  [42210.127646]  [<ffffffffa0288465>] __ext4_get_inode_loc+0x105/0x440 [ext4]
  [42210.127653]  [<ffffffffa028affd>] ext4_get_inode_loc+0x1d/0x20 [ext4]
  [42210.127659]  [<ffffffffa028c866>] ext4_reserve_inode_write+0x26/0xa0 [ext4]
  [42210.127665]  [<ffffffffa028fed0>] ? ext4_dirty_inode+0x40/0x60 [ext4]
  [42210.127671]  [<ffffffffa028c91f>] ext4_mark_inode_dirty+0x3f/0x230 [ext4]
  [42210.127676]  [<ffffffffa028fed0>] ext4_dirty_inode+0x40/0x60 [ext4]
  [42210.127681]  [<ffffffff811ce24a>] __mark_inode_dirty+0x3a/0x2f0
  [42210.127685]  [<ffffffff811bec21>] update_time+0x81/0xd0
  [42210.127687]  [<ffffffff811bee30>] file_update_time+0x80/0xd0
  [42210.127691]  [<ffffffff8113778c>] __generic_file_aio_write+0x16c/0x3b0
  [42210.127695]  [<ffffffff8101517f>] ? math_state_restore+0x9f/0x190
  [42210.127698]  [<ffffffff81137a28>] generic_file_aio_write+0x58/0xa0
  [42210.127703]  [<ffffffffa0284159>] ext4_file_write+0x99/0x3e0 [ext4]
  [42210.127707]  [<ffffffffa0753083>] ? __ablk_encrypt+0x43/0x50 [ablk_helper]
  [42210.127709]  [<ffffffff811524bd>] ? kzfree+0x2d/0x30
  [42210.127713]  [<ffffffff811a430a>] do_sync_write+0x5a/0x90
  [42210.127715]  [<ffffffff811a49cd>] vfs_write+0xbd/0x1e0
  [42210.127718]  [<ffffffff811d0e38>] kernel_write+0x38/0x50
  [42210.127721]  [<ffffffffa006bce9>] ecryptfs_write_lower+0x29/0x50 [ecryptfs]
  [42210.127724]  [<ffffffffa006d0d3>] ecryptfs_encrypt_page+0xe3/0x180 [ecryptfs]
  [42210.127727]  [<ffffffffa006b194>] ecryptfs_writepage+0x14/0x60 [ecryptfs]
  [42210.127729]  [<ffffffff8113fc73>] __writepage+0x13/0x50
  [42210.127731]  [<ffffffff8114020b>] write_cache_pages+0x21b/0x510
  [42210.127733]  [<ffffffff8113fc60>] ? mapping_tagged+0x20/0x20
  [42210.127736]  [<ffffffff811356cb>] ? filemap_fdatawait_range+0x17b/0x1a0
  [42210.127738]  [<ffffffff81140540>] generic_writepages+0x40/0x60
  [42210.127740]  [<ffffffff81141d75>] do_writepages+0x35/0x40
  [42210.127743]  [<ffffffff81136c49>] __filemap_fdatawrite_range+0x59/0x60
  [42210.127745]  [<ffffffff81136ccc>] filemap_write_and_wait+0x2c/0x60
  [42210.127748]  [<ffffffffa006ae12>] ecryptfs_put_lower_file+0x32/0x60 [ecryptfs]
  [42210.127750]  [<ffffffffa00681f2>] ecryptfs_release+0x12/0x30 [ecryptfs]
  [42210.127752]  [<ffffffff811a62e1>] __fput+0xa1/0x230
  [42210.127754]  [<ffffffff811a64be>] ____fput+0xe/0x10
  [42210.127758]  [<ffffffff81081d2c>] task_work_run+0xbc/0xe0
  [42210.127761]  [<ffffffff8106507c>] do_exit+0x2bc/0xab0
  [42210.127764]  [<ffffffff81071a63>] ? __sigqueue_free.part.17+0x33/0x40
  [42210.127766]  [<ffffffff810658ef>] do_group_exit+0x3f/0xa0
  [42210.127769]  [<ffffffff8107488d>] get_signal_to_deliver+0x2ad/0x610
  [42210.127771]  [<ffffffff810144d8>] do_signal+0x48/0x940
  [42210.127776]  [<ffffffff814eadfd>] ? is_prefetch.isra.14.part.15+0xd2/0x251
  [42210.127778]  [<ffffffff811c116f>] ? fget_light+0x8f/0xf0
  [42210.127781]  [<ffffffff81014e38>] do_notify_resume+0x68/0xa0
  [42210.127784]  [<ffffffff814f5bbc>] retint_signal+0x48/0x8c
- [42210.127785] Code: 85 f6 0f 84 4e fe ff ff 4c 89 f7 e8 73 fb ff ff e9 41 fe ff ff 4c 89 e7 e8 66 fb ff ff e9 35 ff ff ff 45 31 f6 eb d1 0f 0b 0f 0b <0f> 0b 66 0f 1f 44 00 00 0f 1f 44 00 00 55 48 89 e5 41 54 53 48 
+ [42210.127785] Code: 85 f6 0f 84 4e fe ff ff 4c 89 f7 e8 73 fb ff ff e9 41 fe ff ff 4c 89 e7 e8 66 fb ff ff e9 35 ff ff ff 45 31 f6 eb d1 0f 0b 0f 0b <0f> 0b 66 0f 1f 44 00 00 0f 1f 44 00 00 55 48 89 e5 41 54 53 48
  [42210.127808] RIP  [<ffffffff811d6ab8>] __find_get_block+0x288/0x290
  [42210.127810]  RSP <ffff8800cad375a0>
  [42210.127812] ---[ end trace 412263861e6006c5 ]---
  [42210.127814] Fixing recursive fault but reboot is needed!
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-14-generic 3.11.0-14.21
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  maarten    1585 F.... lxpanel
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  maarten    1585 F.... lxpanel
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Fri Jan  3 02:43:32 2014
  HibernationDevice: RESUME=UUID=bc17e234-da75-457f-b17c-22d9c0e27dd8
  InstallationDate: Installed on 2013-12-28 (6 days ago)
  InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  IwConfig:
-  eth0      no wireless extensions.
-  
-  lo        no wireless extensions.
+  eth0      no wireless extensions.
+ 
+  lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. Z87X-D3H
  MarkForUpload: True
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed root=UUID=5a8ae1fc-91bf-4ce0-8dea-a519976fd56b ro quiet splash vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-3.11.0-14-generic N/A
-  linux-backports-modules-3.11.0-14-generic  N/A
-  linux-firmware                             1.116
+  linux-restricted-modules-3.11.0-14-generic N/A
+  linux-backports-modules-3.11.0-14-generic  N/A
+  linux-firmware                             1.116
  RfKill:
-  
+ 
  SourcePackage: linux
  StagingDrivers: zram
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/02/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F7
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z87X-D3H-CF
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF7:bd08/02/2013:svnGigabyteTechnologyCo.,Ltd.:pnZ87X-D3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ87X-D3H-CF:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: Z87X-D3H
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

** Tags added: latest-bios-f7

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

-- 
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https://bugs.launchpad.net/bugs/1265684

Title:
  Kernel crash, appears related to ext4 and ecryptfs

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  This problem is very similar, but happened with a different kernel (I
  was using Arch Linux): I am using firefox, I have encrypted my firefox
  profile folder with ecryptfs, and the underlying file system is ext4.
  While I was using firefox, the program became frozen and could not be
  killed. The 'htop' utility indicated that firefox and some other
  processes had status 'D', i.e. 'uninterruptible sleep'. My graphical
  session was still functional, and I could open a terminal and run
  'dmesg', but any attempt to save it to the hard disk would freeze bash
  (uninterruptible sleep, just like firefox). I was able to save the
  output on a different physical hard disk (i.e. not the one that was
  used by firefox and ecrypt). After that I tried to reboot, but this
  caused the kernel to lock up and required a hard reset.

  So far I have not been able to reproduce this issue, so I can only
  give a stack trace for Linux 3.12.6 (from Arch Linux):

  [42210.127535] ------------[ cut here ]------------
  [42210.127540] kernel BUG at fs/buffer.c:1278!
  [42210.127542] invalid opcode: 0000 [#1] PREEMPT SMP
  [42210.127544] Modules linked in: md5 ecb ecryptfs cbc sha256_ssse3 sha256_generic encrypted_keys hmac trusted tpm tpm_bios snd_hda_codec_hdmi snd_hda_codec_realtek nls_cp437 vfat fat nvidia(PO) x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crct10dif_common crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd hid_logitech_dj iTCO_wdt iTCO_vendor_support mxm_wmi ip6t_REJECT microcode evdev xt_hl ip6t_rt snd_hda_intel snd_hda_codec drm snd_hwdep snd_pcm nf_conntrack_ipv6 e1000e nf_defrag_ipv6 snd_page_alloc i2c_i801 snd_timer snd psmouse ptp soundcore mei_me i2c_core pps_core shpchp mei lpc_ich ipt_REJECT serio_raw pcspkr xt_LOG xt_recent fan thermal xt_multiport xt_limit xt_tcpudp xt_addrtype wmi video processor button nf_conntrack_ipv4
  [42210.127583]  nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables ext4 crc16 mbcache jbd2 hid_generic usbhid hid sr_mod cdrom sd_mod ahci libahci libata ehci_pci xhci_hcd ehci_hcd scsi_mod usbcore usb_common
  [42210.127600] CPU: 0 PID: 7198 Comm: firefox Tainted: P           O 3.12.6-1-ARCH #1
  [42210.127601] Hardware name: Gigabyte Technology Co., Ltd. Z87X-D3H/Z87X-D3H-CF, BIOS F7 08/02/2013
  [42210.127603] task: ffff8802070c1a10 ti: ffff8800cad36000 task.ti: ffff8800cad36000
  [42210.127604] RIP: 0010:[<ffffffff811d6ab8>]  [<ffffffff811d6ab8>] __find_get_block+0x288/0x290
  [42210.127609] RSP: 0018:ffff8800cad375a0  EFLAGS: 00010046
  [42210.127610] RAX: 0000000000000092 RBX: ffff88009a0baaf8 RCX: ffff880222edc800
  [42210.127611] RDX: 0000000000001000 RSI: 0000000000d000bb RDI: ffff8800cd0f0700
  [42210.127613] RBP: ffff8800cad375f8 R08: 0000000000000003 R09: 0000000000000003
  [42210.127614] R10: ffff880222edc800 R11: ffffffffa0256a40 R12: ffff8800cd0f0700
  [42210.127615] R13: 0000000000001000 R14: ffff88022eb54400 R15: 0000000000000010
  [42210.127616] FS:  0000000000000000(0000) GS:ffff88022ec00000(0000) knlGS:0000000000000000
  [42210.127617] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [42210.127618] CR2: 00007fa7e5e00018 CR3: 000000000280d000 CR4: 00000000001407f0
  [42210.127619] Stack:
  [42210.127621]  ffffffff811d6f75 ffff8800cad375f0 ffffffff8109c074 ffff8800cad37fd8
  [42210.127624]  ffff880222deb000 0000000000d000bb ffff88009a0baaf8 ffff8800cad376b0
  [42210.127626]  ffff880222edc000 ffff88022eb54400 0000000000000010 ffff8800cad37660
  [42210.127628] Call Trace:
  [42210.127631]  [<ffffffff811d6f75>] ? __getblk+0x25/0x2e0
  [42210.127636]  [<ffffffff8109c074>] ? dequeue_entity+0x144/0x4d0
  [42210.127646]  [<ffffffffa0288465>] __ext4_get_inode_loc+0x105/0x440 [ext4]
  [42210.127653]  [<ffffffffa028affd>] ext4_get_inode_loc+0x1d/0x20 [ext4]
  [42210.127659]  [<ffffffffa028c866>] ext4_reserve_inode_write+0x26/0xa0 [ext4]
  [42210.127665]  [<ffffffffa028fed0>] ? ext4_dirty_inode+0x40/0x60 [ext4]
  [42210.127671]  [<ffffffffa028c91f>] ext4_mark_inode_dirty+0x3f/0x230 [ext4]
  [42210.127676]  [<ffffffffa028fed0>] ext4_dirty_inode+0x40/0x60 [ext4]
  [42210.127681]  [<ffffffff811ce24a>] __mark_inode_dirty+0x3a/0x2f0
  [42210.127685]  [<ffffffff811bec21>] update_time+0x81/0xd0
  [42210.127687]  [<ffffffff811bee30>] file_update_time+0x80/0xd0
  [42210.127691]  [<ffffffff8113778c>] __generic_file_aio_write+0x16c/0x3b0
  [42210.127695]  [<ffffffff8101517f>] ? math_state_restore+0x9f/0x190
  [42210.127698]  [<ffffffff81137a28>] generic_file_aio_write+0x58/0xa0
  [42210.127703]  [<ffffffffa0284159>] ext4_file_write+0x99/0x3e0 [ext4]
  [42210.127707]  [<ffffffffa0753083>] ? __ablk_encrypt+0x43/0x50 [ablk_helper]
  [42210.127709]  [<ffffffff811524bd>] ? kzfree+0x2d/0x30
  [42210.127713]  [<ffffffff811a430a>] do_sync_write+0x5a/0x90
  [42210.127715]  [<ffffffff811a49cd>] vfs_write+0xbd/0x1e0
  [42210.127718]  [<ffffffff811d0e38>] kernel_write+0x38/0x50
  [42210.127721]  [<ffffffffa006bce9>] ecryptfs_write_lower+0x29/0x50 [ecryptfs]
  [42210.127724]  [<ffffffffa006d0d3>] ecryptfs_encrypt_page+0xe3/0x180 [ecryptfs]
  [42210.127727]  [<ffffffffa006b194>] ecryptfs_writepage+0x14/0x60 [ecryptfs]
  [42210.127729]  [<ffffffff8113fc73>] __writepage+0x13/0x50
  [42210.127731]  [<ffffffff8114020b>] write_cache_pages+0x21b/0x510
  [42210.127733]  [<ffffffff8113fc60>] ? mapping_tagged+0x20/0x20
  [42210.127736]  [<ffffffff811356cb>] ? filemap_fdatawait_range+0x17b/0x1a0
  [42210.127738]  [<ffffffff81140540>] generic_writepages+0x40/0x60
  [42210.127740]  [<ffffffff81141d75>] do_writepages+0x35/0x40
  [42210.127743]  [<ffffffff81136c49>] __filemap_fdatawrite_range+0x59/0x60
  [42210.127745]  [<ffffffff81136ccc>] filemap_write_and_wait+0x2c/0x60
  [42210.127748]  [<ffffffffa006ae12>] ecryptfs_put_lower_file+0x32/0x60 [ecryptfs]
  [42210.127750]  [<ffffffffa00681f2>] ecryptfs_release+0x12/0x30 [ecryptfs]
  [42210.127752]  [<ffffffff811a62e1>] __fput+0xa1/0x230
  [42210.127754]  [<ffffffff811a64be>] ____fput+0xe/0x10
  [42210.127758]  [<ffffffff81081d2c>] task_work_run+0xbc/0xe0
  [42210.127761]  [<ffffffff8106507c>] do_exit+0x2bc/0xab0
  [42210.127764]  [<ffffffff81071a63>] ? __sigqueue_free.part.17+0x33/0x40
  [42210.127766]  [<ffffffff810658ef>] do_group_exit+0x3f/0xa0
  [42210.127769]  [<ffffffff8107488d>] get_signal_to_deliver+0x2ad/0x610
  [42210.127771]  [<ffffffff810144d8>] do_signal+0x48/0x940
  [42210.127776]  [<ffffffff814eadfd>] ? is_prefetch.isra.14.part.15+0xd2/0x251
  [42210.127778]  [<ffffffff811c116f>] ? fget_light+0x8f/0xf0
  [42210.127781]  [<ffffffff81014e38>] do_notify_resume+0x68/0xa0
  [42210.127784]  [<ffffffff814f5bbc>] retint_signal+0x48/0x8c
  [42210.127785] Code: 85 f6 0f 84 4e fe ff ff 4c 89 f7 e8 73 fb ff ff e9 41 fe ff ff 4c 89 e7 e8 66 fb ff ff e9 35 ff ff ff 45 31 f6 eb d1 0f 0b 0f 0b <0f> 0b 66 0f 1f 44 00 00 0f 1f 44 00 00 55 48 89 e5 41 54 53 48
  [42210.127808] RIP  [<ffffffff811d6ab8>] __find_get_block+0x288/0x290
  [42210.127810]  RSP <ffff8800cad375a0>
  [42210.127812] ---[ end trace 412263861e6006c5 ]---
  [42210.127814] Fixing recursive fault but reboot is needed!

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-14-generic 3.11.0-14.21
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  maarten    1585 F.... lxpanel
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Fri Jan  3 02:43:32 2014
  HibernationDevice: RESUME=UUID=bc17e234-da75-457f-b17c-22d9c0e27dd8
  InstallationDate: Installed on 2013-12-28 (6 days ago)
  InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. Z87X-D3H
  MarkForUpload: True
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed root=UUID=5a8ae1fc-91bf-4ce0-8dea-a519976fd56b ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-14-generic N/A
   linux-backports-modules-3.11.0-14-generic  N/A
   linux-firmware                             1.116
  RfKill:

  SourcePackage: linux
  StagingDrivers: zram
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/02/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F7
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z87X-D3H-CF
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF7:bd08/02/2013:svnGigabyteTechnologyCo.,Ltd.:pnZ87X-D3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ87X-D3H-CF:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: Z87X-D3H
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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References

[Bug 1265684] [NEW] Kernel crash, appears related to ext4 and ecryptfs
From: Maarten Baert, 2014-01-03