[Bug 1670336] Re: Ubiquity problem with encrypted home option: system hangs because of ecryptfs-setup-swap not working with swapfiles

[Launchpad Bug Tracker]

** Branch linked: lp:~laney/ubiquity/lp1670336

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Title:
  Ubiquity problem with encrypted home option: system hangs because of
  ecryptfs-setup-swap not working with swapfiles

Status in eCryptfs:
  Triaged
Status in cryptsetup package in Ubuntu:
  Confirmed
Status in ubiquity package in Ubuntu:
  Triaged
Status in cryptsetup source package in Zesty:
  Confirmed
Status in ubiquity source package in Zesty:
  Triaged

Bug description:
  Description:	Ubuntu Zesty Zapus (development branch)
  Release:	17.04
  ecryptfs-utils:
    Installato: 111-0ubuntu4
    Candidato:  111-0ubuntu4
    Tabella versione:
   *** 111-0ubuntu4 500
          500 http://it.archive.ubuntu.com/ubuntu zesty/main amd64 Packages
          100 /var/lib/dpkg/status

  Ubuntu 17.04 uses swapfiles by default.

  If you select the "encrypt home folder" option when creating the main
  user during Ubuntu 17.04 beta1 installation (which makes Ubiquity run
  also the ecryptfs-setup-swap command), after installation the system
  hangs a lot during boot, because it fails to activate swap (output of
  "systemctl status swapfile.swap" says "failed to activate swap
  /swapfile").

  If you install Ubuntu 17.04 beta1 without selecting "encrypt home
  folder", and only after installation you run the ecryptfs-migrate-home
  utility, everything works. But as soon as you try to manually setup
  encrypyted swap (by running ecryptfs-setup-swap), you get the same
  problem as above.

  In particular, you get the following error when running ecryptfs-
  setup-swap:

  INFO: Setting up swap: [/swapfile]
  device node not found
  WARNING: Commented out your unencrypted swap from /etc/fstab
  swapon: cannot open /dev/mapper/cryptswap1: No such file or directory

  This is due to an ecryptfs-utils bug.
  In particular, ecryptfs-setup-swap puts in /etc/crypttab a line like this:

  cryptswap1 UID=XXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-
  plain64

  (like there were a swap partition with UID=XXXXXXXX) while with a
  swapfile it should put the following line:

  cryptswap1 /swapfile /dev/urandom swap,offset=1024,cipher=aes-xts-
  plain64

  If you manually change that line and reboot, you get rid of the problem - before rebooting, check also that your /etc/fstab file ends with:
  #/swapfile none            swap    sw              0       0
  /dev/mapper/cryptswap1 none swap sw 0 0

  This bug indirectly affects also Ubiquity, because when you choose the
  "encrypt home folder" option during installation, ubiquity runs also
  ecryptfs-setup-swap; since Ubuntu 17.04 uses swapfiles by default, and
  ecryptfs-setup-swap does not work with swapfiles, after installation
  you get the system hanging a lot at boot (and when it finally starts
  it has no swap).

  I tried both with Ubuntu Budgie and with Ubuntu Gnome, the problem is
  the same.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: ecryptfs-utils 111-0ubuntu4
  ProcVersionSignature: Ubuntu 4.10.0-9.11-generic 4.10.0
  Uname: Linux 4.10.0-9-generic x86_64
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Mon Mar  6 12:47:39 2017
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2017-03-05 (0 days ago)
  InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Alpha amd64 (20170219)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  SourcePackage: ecryptfs-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

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