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[Steve Beattie <sbeattie@xxxxxxxxxx>]

** Information type changed from Private Security to Public Security

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https://bugs.launchpad.net/bugs/1487016

Title:
  Removing EXT3 USB key while unmounting left system stuck

Status in linux-lts-trusty package in Ubuntu:
  New

Bug description:
  When ejecting and then removing an USB stick using an EXT3 fs in the
  short interval before it is completely unmounted, "umount" gets stuck
  at 100% CPU load. The process cannot be killed, even with signal 9
  (KILL).

  Any attempt to mount an storage device results in an error.

  Any USB device plugged afterwards is not mounted, the system would not enter standby and would stuck on reboot or shutdown. 
  Not shutting down or enter suspend may expose security risks, as encrypted filesystems may stay open and screen locks fail to lock.

  Despite this, the system works normally.

  Kernel exposing this bug: 3.13.0-62-generic

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.13.0-62-generic 3.13.0-62.102~precise1
  ProcVersionSignature: Ubuntu 3.13.0-62.102~precise1-generic 3.13.11-ckt24
  Uname: Linux 3.13.0-62-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-62-generic.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: CX20590 Analog [CX20590 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu17.9
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: CX20590 Analog [CX20590 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  dronus     2639 F.... pulseaudio
  CRDA:
   country DE:
   	(2400 - 2483 @ 40), (N/A, 20)
   	(5150 - 5250 @ 40), (N/A, 20), NO-OUTDOOR
   	(5250 - 5350 @ 40), (N/A, 20), NO-OUTDOOR, DFS
   	(5470 - 5725 @ 40), (N/A, 26), DFS
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf2a20000 irq 53'
     Mixer name	: 'Conexant CX20590'
     Components	: 'HDA:14f1506e,17aa21d2,00100000'
     Controls      : 21
     Simple ctrls  : 10
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown'
     Mixer name	: 'ThinkPad EC (unknown)'
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Date: Thu Aug 20 14:39:11 2015
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=6ccee672-78cd-4314-817e-edc6c8e72563
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MachineType: LENOVO 4173W1J
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-62-generic root=UUID=44f71bef-2898-4ffa-bc57-631db5e42ca7 ro splash quiet
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-62-generic N/A
   linux-backports-modules-3.13.0-62-generic  N/A
   linux-firmware                             1.79.18
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux-lts-trusty
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/14/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8CET49WW (1.29 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4173W1J
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8CET49WW(1.29):bd09/14/2011:svnLENOVO:pn4173W1J:pvrThinkPadT420s:rvnLENOVO:rn4173W1J:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4173W1J
  dmi.product.version: ThinkPad T420s
  dmi.sys.vendor: LENOVO

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