apport information

** Attachment added: "ProcInterrupts.txt"
   
https://bugs.launchpad.net/bugs/1740309/+attachment/5028138/+files/ProcInterrupts.txt

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https://bugs.launchpad.net/bugs/1740309

Title:
  user space process hangs when reading partition table of disk

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  user space process as in parted or fdisk or update-grub2 that read partition 
tables freeze on my system:
  /dev/sda/  GPT disk with efi, swap and ubuntu artful partition
  /dev/sdb  old style partition table with one ext4 partition
  /dev/sdc GPT disk with efi partition, windows 10

  I.e. if I run as root :
  # fdisk -l
  Disk /dev/sda: 232,9 GiB, 250059350016 bytes, 488397168 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disklabel type: gpt
  Disk identifier: 56FF6AB0-076F-483C-890F-EC4B4FAF6313

  Device        Start       End   Sectors   Size Type
  /dev/sda1      2048   2000895   1998848   976M EFI System
  /dev/sda2   2000896  10000383   7999488   3,8G Linux swap
  /dev/sda3  10000384 488396799 478396416 228,1G Linux filesystem

  Disk /dev/sdb: 489,1 GiB, 525112713216 bytes, 1025610768 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disklabel type: dos
  Disk identifier: 0x2f11f9c4

  Device     Boot Start        End    Sectors  Size Id Type
  /dev/sdb1        2048 1025609727 1025607680  489G 83 Linux
  <...process hangs here forever...>

  With gdb I stepped through fdisk -l and saw that the call to open 
('dev/sdc'..) never returns.
  --
  ApportVersion: 2.20.7-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D3p:   andreas    1807 F...m pulseaudio
   /dev/snd/controlC0:  andreas    1807 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 17.10
  HibernationDevice: RESUME=UUID=8a7a6077-0a3e-4641-8f15-bd6f09826510
  InstallationDate: Installed on 2017-12-26 (1 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  IwConfig:
   lo        no wireless extensions.

   enp8s0    no wireless extensions.

   enp12s0   no wireless extensions.
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  Package: linux-image-4.13.0-21-generic 4.13.0-21.24
  PackageArchitecture: amd64
  ProcFB:
   0 radeondrmfb
   1 astdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-21-generic.efi.signed 
root=UUID=4f18ad67-a4f0-4e03-b061-66615751538e ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.13.0-21.24-generic 4.13.13
  RelatedPackageVersions:
   linux-restricted-modules-4.13.0-21-generic N/A
   linux-backports-modules-4.13.0-21-generic  N/A
   linux-firmware                             1.169.1
  RfKill:

  Tags:  artful
  Uname: Linux 4.13.0-21-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 12/09/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.80
  dmi.board.name: EP2C602
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP1.80:bd12/09/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnEP2C602:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.family: To Be Filled By O.E.M.
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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