[Bug 1157299] [NEW] e4defrag segfaults, turns disk inacessible

[Janis Petersons]

Public bug reported:

While in the middle of defragmenting a mounted ext4 partition e4defrag segfaults. The message "Segfault" is printed into stdout. After failing e4defrag presumably locks write access to the disk or limits access speeds severely, as programs can still be executed but not always, although more time is needed for any task. For example opening a new bash terminal session and typing in one command may work. However, after that the terminal becomes unresponsive and only responds to a Ctr+D. This was tested for both terminal clients running in xserver and the tty. Problem does not persist after reboot. Reboots can't always be completed successfully, requiring a hard reset. Home and root exist on separate partitions on the same drive. 
Steps to reproduce:
1. Perform a lengthy defragmentation. This was tested for /, /home and a separate folder on /home. 
2. After some time segfault occurs.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: e2fsprogs 1.42-1ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-39.62-generic 3.2.39
Uname: Linux 3.2.0-39-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
Date: Tue Mar 19 17:29:33 2013
InstallationMedia: Kubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120820.1)
MarkForUpload: True
SourcePackage: e2fsprogs
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: e2fsprogs (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/1157299

Title:
  e4defrag segfaults, turns disk inacessible

Status in “e2fsprogs” package in Ubuntu:
  New

Bug description:
  While in the middle of defragmenting a mounted ext4 partition e4defrag segfaults. The message "Segfault" is printed into stdout. After failing e4defrag presumably locks write access to the disk or limits access speeds severely, as programs can still be executed but not always, although more time is needed for any task. For example opening a new bash terminal session and typing in one command may work. However, after that the terminal becomes unresponsive and only responds to a Ctr+D. This was tested for both terminal clients running in xserver and the tty. Problem does not persist after reboot. Reboots can't always be completed successfully, requiring a hard reset. Home and root exist on separate partitions on the same drive. 
  Steps to reproduce:
  1. Perform a lengthy defragmentation. This was tested for /, /home and a separate folder on /home. 
  2. After some time segfault occurs.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: e2fsprogs 1.42-1ubuntu2
  ProcVersionSignature: Ubuntu 3.2.0-39.62-generic 3.2.39
  Uname: Linux 3.2.0-39-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.0.1-0ubuntu17.1
  Architecture: amd64
  Date: Tue Mar 19 17:29:33 2013
  InstallationMedia: Kubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120820.1)
  MarkForUpload: True
  SourcePackage: e2fsprogs
  UpgradeStatus: No upgrade log present (probably fresh install)

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