[Bug 1321923] [NEW] Udisks sometimes fails to mount loop devices

[Brendan]

Public bug reported:

I can produce the bug by running this script:

#!/bin/bash
sleep=""
# Create a FAT filesystem image 
# (-C makes it create the file - 2048 is the number of blocks)
ls test.img && rm test.img
$sleep
mkfs.msdos -C test.img 2048
$sleep
loopdev=$(losetup -f --show test.img)
$sleep
udisks --mount $loopdev
$sleep
udisks --unmount $loopdev
$sleep
losetup -d $loopdev

"udisks --mount" says: Cannot find device with major:minor 7:1: No such
device

If the "sleep" variable in the script above is set to "sleep 2" (so that
there's a 2 second delay between each command), the problem doesn't
appear (and accordingly I haven't reproduced it by typing commands at an
interactive prompt - presumably because of the delay between commands).

Sorry, not too sure what other info I can add. I haven't done any custom
configuration relating to Udev, Udisks or systemd in general. I am
running this script as a normal user, after running "sudo chmod a+rw
/dev/loop*".

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: udisks 1.0.5-1
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
Date: Wed May 21 21:53:08 2014
InstallationDate: Installed on 2014-05-15 (6 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Acer Aspire X1301
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=e6c94cb4-2ac4-4282-bcd2-a7d6c10bd27e ro quiet splash vt.handoff=7
SourcePackage: udisks
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/06/2009
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: P01-A2
dmi.board.name: WMCP78M
dmi.board.vendor: Acer
dmi.chassis.type: 3
dmi.chassis.vendor: Acer
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrP01-A2:bd11/06/2009:svnAcer:pnAspireX1301:pvr:rvnAcer:rnWMCP78M:rvr:cvnAcer:ct3:cvr:
dmi.product.name: Aspire X1301
dmi.sys.vendor: Acer

** Affects: udisks (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1321923

Title:
  Udisks sometimes fails to mount loop devices

Status in “udisks” package in Ubuntu:
  New

Bug description:
  I can produce the bug by running this script:

  #!/bin/bash
  sleep=""
  # Create a FAT filesystem image 
  # (-C makes it create the file - 2048 is the number of blocks)
  ls test.img && rm test.img
  $sleep
  mkfs.msdos -C test.img 2048
  $sleep
  loopdev=$(losetup -f --show test.img)
  $sleep
  udisks --mount $loopdev
  $sleep
  udisks --unmount $loopdev
  $sleep
  losetup -d $loopdev

  "udisks --mount" says: Cannot find device with major:minor 7:1: No
  such device

  If the "sleep" variable in the script above is set to "sleep 2" (so
  that there's a 2 second delay between each command), the problem
  doesn't appear (and accordingly I haven't reproduced it by typing
  commands at an interactive prompt - presumably because of the delay
  between commands).

  Sorry, not too sure what other info I can add. I haven't done any
  custom configuration relating to Udev, Udisks or systemd in general. I
  am running this script as a normal user, after running "sudo chmod
  a+rw /dev/loop*".

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: udisks 1.0.5-1
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  Date: Wed May 21 21:53:08 2014
  InstallationDate: Installed on 2014-05-15 (6 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Acer Aspire X1301
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=e6c94cb4-2ac4-4282-bcd2-a7d6c10bd27e ro quiet splash vt.handoff=7
  SourcePackage: udisks
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/06/2009
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: P01-A2
  dmi.board.name: WMCP78M
  dmi.board.vendor: Acer
  dmi.chassis.type: 3
  dmi.chassis.vendor: Acer
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrP01-A2:bd11/06/2009:svnAcer:pnAspireX1301:pvr:rvnAcer:rnWMCP78M:rvr:cvnAcer:ct3:cvr:
  dmi.product.name: Aspire X1301
  dmi.sys.vendor: Acer

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