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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Are you able to reproduce this bug, or was it a one time event?

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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

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https://bugs.launchpad.net/bugs/1414596

Title:
  Kernel BUG: IP: [<ffffffff8114ee13>] find_get_page+0x33/0xa0

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Trace:

  Jan 26 10:54:48 lhs kernel: [172150.595480] BUG: unable to handle kernel paging request at 0000000101500050
  Jan 26 10:54:48 lhs kernel: [172150.595505] IP: [<ffffffff8114ee13>] find_get_page+0x33/0xa0
  Jan 26 10:54:48 lhs kernel: [172150.595525] PGD 89115067 PUD 3aaec4067 PMD 0 
  Jan 26 10:54:48 lhs kernel: [172150.595539] Oops: 0000 [#1] SMP 
  Jan 26 10:54:48 lhs kernel: [172150.595549] Modules linked in: btusb hid_logitech_dj usbhid hid usb_storage ctr ccm dm_crypt pn544_mei mei_phy pn544 hci nfc dell_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp arc4 coretemp kvm_intel dell_laptop dcdbas rfcomm kvm bnep crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel iwlmvm aes_x86_64 lrw gf128mul glue_helper mac80211 ablk_helper cryptd joydev iwlwifi serio_raw bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev cfg80211 lpc_ich mei_me mei snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq nls_iso8859_1 snd_seq_device snd_timer mac_hid snd parport_pc soundcore ppdev lp parport i915 e1000e ahci i2c_algo_bit drm_kms_helper psmouse drm ptp libahci sdhci_pci sdhci pps_core wmi video [last unloaded: btusb]
  Jan 26 10:54:48 lhs kernel: [172150.595799] CPU: 0 PID: 30884 Comm: java Not tainted 3.13.0-45-generic #74-Ubuntu
  Jan 26 10:54:48 lhs kernel: [172150.595820] Hardware name: Dell Inc. Latitude E7440/07F3F4, BIOS A13 12/18/2014
  Jan 26 10:54:48 lhs kernel: [172150.595839] task: ffff8802ee33c800 ti: ffff8802d327e000 task.ti: ffff8802d327e000
  Jan 26 10:54:48 lhs kernel: [172150.595859] RIP: 0010:[<ffffffff8114ee13>]  [<ffffffff8114ee13>] find_get_page+0x33/0xa0
  Jan 26 10:54:48 lhs kernel: [172150.595888] RSP: 0018:ffff8802d327fb78  EFLAGS: 00010246
  Jan 26 10:54:48 lhs kernel: [172150.595902] RAX: ffff8800d5eb1740 RBX: ffff8803de0ff7d8 RCX: 00000000fffffffa
  Jan 26 10:54:48 lhs kernel: [172150.595921] RDX: 0000000101500034 RSI: ffff8800d5eb1740 RDI: 0000000000000000
  Jan 26 10:54:48 lhs kernel: [172150.595939] RBP: ffff8802d327fb88 R08: 0000000101500034 R09: ffff8800d5eb1630
  Jan 26 10:54:48 lhs kernel: [172150.595958] R10: 0000000000000021 R11: ffffea0010025a00 R12: 00000000000edc9f
  Jan 26 10:54:48 lhs kernel: [172150.595976] R13: 00000000000edc9f R14: 00000000000edc9f R15: 00000000000000d0
  Jan 26 10:54:48 lhs kernel: [172150.595995] FS:  00007fa21fdff700(0000) GS:ffff88041ea00000(0000) knlGS:0000000000000000
  Jan 26 10:54:48 lhs kernel: [172150.596016] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Jan 26 10:54:48 lhs kernel: [172150.596031] CR2: 0000000101500050 CR3: 00000000d6b32000 CR4: 00000000001407f0
  Jan 26 10:54:48 lhs kernel: [172150.596052] Stack:
  Jan 26 10:54:48 lhs kernel: [172150.596062]  ffff88033ddc3700 ffff8803de0ff7d0 ffff8802d327fbb0 ffffffff8114f37f
  Jan 26 10:54:48 lhs kernel: [172150.596097]  ffff88033ddc3700 ffff8803de0ff7d0 00000000010200da ffff8802d327fbf0
  Jan 26 10:54:48 lhs kernel: [172150.596118]  ffffffff8114fcff ffff880402b2c000 ffff88033ddc3700 ffff8803de0ff680
  Jan 26 10:54:48 lhs kernel: [172150.596139] Call Trace:
  Jan 26 10:54:48 lhs kernel: [172150.596149]  [<ffffffff8114f37f>] find_lock_page+0x1f/0x70
  Jan 26 10:54:48 lhs kernel: [172150.596165]  [<ffffffff8114fcff>] grab_cache_page_write_begin+0x5f/0xd0
  Jan 26 10:54:48 lhs kernel: [172150.596184]  [<ffffffff81245398>] ext4_da_write_begin+0x98/0x310
  Jan 26 10:54:48 lhs kernel: [172150.596201]  [<ffffffff8114f078>] generic_file_buffered_write+0xf8/0x250
  Jan 26 10:54:48 lhs kernel: [172150.596220]  [<ffffffff81150741>] __generic_file_aio_write+0x1c1/0x3d0
  Jan 26 10:54:48 lhs kernel: [172150.596238]  [<ffffffff811509a8>] generic_file_aio_write+0x58/0xa0
  Jan 26 10:54:48 lhs kernel: [172150.596255]  [<ffffffff8123b3c9>] ext4_file_write+0x99/0x400
  Jan 26 10:54:48 lhs kernel: [172150.596272]  [<ffffffff811bd45a>] do_sync_write+0x5a/0x90
  Jan 26 10:54:48 lhs kernel: [172150.596287]  [<ffffffff811bdbe4>] vfs_write+0xb4/0x1f0
  Jan 26 10:54:48 lhs kernel: [172150.596302]  [<ffffffff811be619>] SyS_write+0x49/0xa0
  Jan 26 10:54:48 lhs kernel: [172150.596317]  [<ffffffff8173196d>] system_call_fastpath+0x1a/0x1f
  Jan 26 10:54:48 lhs kernel: [172150.596333] Code: e5 41 54 49 89 f4 53 48 8d 5f 08 4c 89 e6 48 89 df e8 12 9f 21 00 48 85 c0 48 89 c6 74 3a 48 8b 10 48 85 d2 74 26 f6 c2 03 75 4c <8b> 4a 1c 85 c9 74 d9 8d 79 01 4c 8d 4a 1c 89 c8 f0 0f b1 7a 1c 
  Jan 26 10:54:48 lhs kernel: [172150.596410] RIP  [<ffffffff8114ee13>] find_get_page+0x33/0xa0
  Jan 26 10:54:48 lhs kernel: [172150.596426]  RSP <ffff8802d327fb78>
  Jan 26 10:54:48 lhs kernel: [172150.596436] CR2: 0000000101500050
  Jan 26 10:54:49 lhs kernel: [172151.190254] ---[ end trace 8b45381f1eaeb686 ]---

  System was frozen and required hard reboot (hold down power button) to
  recover. Not in active use at the time of crash. System switched from
  X to console by itself to display crash trace and froze after that.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-45-generic 3.13.0-45.74
  ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
  Uname: Linux 3.13.0-45-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  oyvind     1992 F.... pulseaudio
   /dev/snd/controlC0:  oyvind     1992 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Jan 26 11:22:16 2015
  HibernationDevice: RESUME=UUID=d913ab68-ff2c-481e-9e50-2cddfc2bfc33
  InstallationDate: Installed on 2014-04-01 (299 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  MachineType: Dell Inc. Latitude E7440
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-45-generic.efi.signed root=UUID=7255658f-91f7-4dba-b6c4-185cd810e17b ro quiet splash i8042.nopnp
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-45-generic N/A
   linux-backports-modules-3.13.0-45-generic  N/A
   linux-firmware                             1.127.11
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/18/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A13
  dmi.board.name: 07F3F4
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA13:bd12/18/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn07F3F4:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7440
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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