[Bug 1939626] Re: Ubiquity formats Luks partition regardless of user choice and results in data loss

[Paul White]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. We are sorry that we do not always have the capacity to
review all reported bugs in a timely manner.

Ubiquity is now unmaintained as it has been replaced by either the
Ubuntu Desktop Installer or Calamares starting with Ubuntu 24.04 LTS.
Therefore, this bug is being closed as 'Invalid'.

If you believe this was done in error, please feel free to re-open the
bug report.

If you have any general questions about Ubuntu, please open a topic on
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** Changed in: ubiquity (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1939626

Title:
  Ubiquity formats Luks partition regardless of user choice and results
  in data loss

Status in ubiquity package in Ubuntu:
  Invalid

Bug description:
  Xubuntu 20.04.2
  ubiquity 20.04.15.10
  partman-crypto

  Lost an lvm PV because of this.

  Steps to reproduce:
  1. Create encrypted partition with cryptsetup luksFormat
  2. Check crypt partition UUID with cryptsetup luksUUID
  3. Close crypt volume with cryptsetup luksClose if necessary.  Launch ubiquity installer.
  …
  4. no updates
  5. Installation type: Something else
  6. Select an existing Luks partition and change to "physical volume for encryption".
  7. "Edit partition" dialog options for "Format the partition" and "Overwrite empty disk space" are unchecked.  Enter key and confirm.
  8. Long pause.  Crypt volume appears on main window.
  9. Check crypt partition UUID again.  It has changed due to an unrequested luksFormat.
  10. Syslog shows:

  xubuntu partman-crypto: WARNING: Device /dev/sda1 already contains a
  'crypto_LUKS' superblock signature.

  11. Repeat with the crypt volume open to block writes.  Error dialog after step #7 reports "Configuration of encrypted volumes failed" "An error occurred while configuring encrypted volumes.  The configuration has been aborted".
  12. Syslog shows: 

  xubuntu partman-crypto: Device /dev/sda1 is in use. Can not proceed with format operation.
  xubuntu partman-crypto: WARNING: Device /dev/sda1 already contains a 'crypto_LUKS' superblock signature.

  Tried ubiquity --debug but didn't find anything pertaining to the
  problem in the other logs.

  Not sure if the problem is with ubiquity, partman-crypto, or both.  It
  needs a "cryptsetup isLuks" check somewhere along with some warnings.

  Probable manifestations of the same bug:
  bug 1909821
  bug 1779548

  Possibly related upstream bugs:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=451535
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=616716

  Upstream development of parman-crypto seems very slow.  Mostly just language updates.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu27.16
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.445.1
  DistroRelease: Ubuntu 20.04
  InstallCmdLine: file=/cdrom/preseed/xubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
  LiveMediaBuild: Xubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
  NonfreeKernelModules: wl zfs zunicode zavl icp zcommon znvpair
  Package: ubiquity 20.04.15.10 [origin: unknown]
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 5.8.0-43.49~20.04.1-generic 5.8.18
  Tags: third-party-packages focal ubiquity-20.04.15.10 xubuntu
  Uname: Linux 5.8.0-43-generic x86_64
  UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: N/A
  _MarkForUpload: True
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu27.16
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.445.1
  DistroRelease: Ubuntu 20.04
  InstallCmdLine: file=/cdrom/preseed/xubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
  LiveMediaBuild: Xubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
  NonfreeKernelModules: wl zfs zunicode zavl icp zcommon znvpair
  Package: ubiquity 20.04.15.10
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 5.8.0-43.49~20.04.1-generic 5.8.18
  Tags:  focal ubiquity-20.04.15.10 xubuntu
  Uname: Linux 5.8.0-43-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: N/A
  _MarkForUpload: True

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