[Bug 1771901] [NEW] bionic install with D-I produces corrupt filesystem

[Doug Zongker]

Public bug reported:

Repro:
1) install to empty disk image from ubuntu-18.04-server-amd64.iso
2) accept all defaults except don't use LVM (not sure if this makes a difference, but I pick "Guided - use entire disk")
3) run e2fsck on resulting disk image, see errors

I think this happens because the target disk is not correctly unmounted
prior to being powered off:

May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/65partman-md
May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/70mtab
May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/90base-installer
May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/90console
May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/94random-seed
May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/94save-logs
May 17 22:57:40 finish-install: info: Running /usr/lib/finish-install.d/95umount
May 17 22:57:40 finish-install: umount: can't unmount /target: Device or resource busy
May 17 22:57:40 finish-install: umount: can't unmount /dev/pts: Device or resource busy
May 17 22:57:40 finish-install: umount: can't unmount /dev: Device or resource busy
May 17 22:57:40 finish-install: umount: can't unmount /run: Device or resource busy
May 17 22:57:40 finish-install: umount: can't unmount /: Invalid argument
May 17 22:57:40 finish-install: info: Running /usr/lib/finish-install.d/97release-dhcp-lease
May 17 22:57:40 finish-install: info: Running /usr/lib/finish-install.d/98exit-installer
May 17 22:57:40 finish-install: warning: /usr/lib/finish-install.d/98exit-installer returned error code 1
May 17 22:57:40 finish-install: info: Running /usr/lib/finish-install.d/99reboot

** Affects: finish-install (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1771901

Title:
  bionic install with D-I produces corrupt filesystem

Status in finish-install package in Ubuntu:
  New

Bug description:
  Repro:
  1) install to empty disk image from ubuntu-18.04-server-amd64.iso
  2) accept all defaults except don't use LVM (not sure if this makes a difference, but I pick "Guided - use entire disk")
  3) run e2fsck on resulting disk image, see errors

  I think this happens because the target disk is not correctly
  unmounted prior to being powered off:

  May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/65partman-md
  May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/70mtab
  May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/90base-installer
  May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/90console
  May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/94random-seed
  May 17 22:57:39 finish-install: info: Running /usr/lib/finish-install.d/94save-logs
  May 17 22:57:40 finish-install: info: Running /usr/lib/finish-install.d/95umount
  May 17 22:57:40 finish-install: umount: can't unmount /target: Device or resource busy
  May 17 22:57:40 finish-install: umount: can't unmount /dev/pts: Device or resource busy
  May 17 22:57:40 finish-install: umount: can't unmount /dev: Device or resource busy
  May 17 22:57:40 finish-install: umount: can't unmount /run: Device or resource busy
  May 17 22:57:40 finish-install: umount: can't unmount /: Invalid argument
  May 17 22:57:40 finish-install: info: Running /usr/lib/finish-install.d/97release-dhcp-lease
  May 17 22:57:40 finish-install: info: Running /usr/lib/finish-install.d/98exit-installer
  May 17 22:57:40 finish-install: warning: /usr/lib/finish-install.d/98exit-installer returned error code 1
  May 17 22:57:40 finish-install: info: Running /usr/lib/finish-install.d/99reboot

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