[Bug 1920665] Re: Ubiquity KDE crash on try/install and from live session with "malloc(): unaligned tcache chunk detected"

Rik Mills 1920665 at bugs.launchpad.net
Mon Apr 5 08:26:16 UTC 2021


** Description changed:

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: ubiquity 21.04.11
  ProcVersionSignature: Ubuntu 5.11.0-11.12-generic 5.11.0
  Uname: Linux 5.11.0-11-generic x86_64
  ApportVersion: 2.20.11-0ubuntu60
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.460
  CurrentDesktop: KDE
  Date: Sun Mar 21 11:53:44 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Kubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20210321)
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)
  
  Since approximately 16/03/2021 ubiquity from maybe-ubiquity (try install
  screen) and from the live session is crashing on launch or shortly
  after.
  
  Cases where the crash can be triggered:
  
  - Using a Virtualbox VM, where graphics acceleration is handled by mesa with LLVMPIPE
  - Start the ISO on real hardware in 'safe graphics mode'
  
  Cases where the crash is not encountered:
  - Start the ISO on real intel (HD graphics) hardware with full acceleration.
  
  NOTE: The crash can be avoided by downgrading MESA 21.0.x packages to
  the previous 20.3.4 in hirsute.
  
  Try/Install crash:
  
  Screen fails to start, or starts then crashes on any user action. The
  user is presented with:
  
  "Installation failed - The installer encountered an unrecoverable error.
  A desktop session will now be run so that you may investigate the problem or try installing again"
  
  Live session crash:
  
  The installer does not start from the desktop icon. Starting ubiquity
  from the terminal results in an "Aborted (core dumped)" message and
  nothing else.
  
+ The crash is most commonly "malloc(): unaligned tcache chunk detected",
+ but inevitably from this sort of memory issue can be something like
+ "realloc(): invalid next size"
+ 
  An example /var/log/installer/debug log from a session where both
  crashes were triggered is below.
  
  **** /var/log/installer/debug ****
  
  Ubiquity 21.04.11
  TEXT <small>If more than one person will use this computer, you can set up multiple accounts after installation.</small>
  TEXT <small>Enter the same password twice, so that it can be checked for typing errors.</small>
  TEXT <small>The name it uses when it talks to other computers.</small>
  TEXT <small>Enter the same password twice, so that it can be checked for typing errors.</small>
  TEXT <small>Enter the same password twice, so that it can be checked for typing errors.</small>
  TEXT <small>If more than one person will use this computer, you can set up multiple accounts after installation.</small>
  TEXT <small>Enter the same password twice, so that it can be checked for typing errors.</small>
  TEXT <small>The name it uses when it talks to other computers.</small>
  QSocketNotifier: Invalid socket 17 and type 'Read', disabling...
  QSocketNotifier: Invalid socket 17 and type 'Write', disabling...
  QSocketNotifier: Invalid socket 17 and type 'Exception', disabling...
  Your console font configuration will be updated the next time your system
  boots. If you want to update it now, run 'setupcon' from a virtual console.
  update-initramfs is disabled since running on read-only media
  debconf: DbDriver "passwords" warning: could not open /var/cache/debconf/passwords.dat: Permission denied
  munmap_chunk(): invalid pointer
  Ubiquity 21.04.11
  QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-kubuntu'
  QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-kubuntu'
  QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-kubuntu'
  TEXT <small>If more than one person will use this computer, you can set up multiple accounts after installation.</small>
  TEXT <small>Enter the same password twice, so that it can be checked for typing errors.</small>
  TEXT <small>The name it uses when it talks to other computers.</small>
  TEXT <small>Enter the same password twice, so that it can be checked for typing errors.</small>
  malloc(): unaligned tcache chunk detected

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https://bugs.launchpad.net/bugs/1920665

Title:
  Ubiquity KDE crash on try/install and from live session with
  "malloc(): unaligned tcache chunk detected"

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