Maybe also Ubiquity needs to be patched, I am not sure since I did not
have time to test it yet.
I did the following test to isolate the problems.
1) Fresh ubuntu 17.04 installation with no encrypted home (and no encrypted
swap). /etc/crypttab is empty, and in /etc/fstab I have the following line:
/swapfile none swap sw 0 0
2) After successfully running ecryptfs-migrate-home, I run ecryptfs-setup-swap
(the "original" version, not the one with the above patch) and I get:
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
Now in /etc/fstab I have:
#/swapfile none swap sw 0 0
/dev/mapper/cryptswap1 none swap sw 0 0
and in /etc/crypttab I have:
cryptswap1 UUID=98a3bb25-2c4d-4897-974c-d5dfcc16be8f /dev/urandom
swap,offset=1024,cipher=aes-xts-plain64
If I run free, I see that I have no swap:
total used free shared buff/cache available
Mem: 8084440 1421116 4575096 273228 2088228 6086972
Swap: 0 0 0
3) I reboot, and the system hangs a lot during boot. I see "a start job is
running for dev-mapper-cryptswap1.device". After a couple of minutes, the boot
process ends and I can login. If I run "systemctl status swapfile.swap" and
"free" I see that (unencryted) swapfile has been activated anyway.
THIS IS DIFFERENT FROM WHAT I GOT WHEN DOING A FRESH UBUNTU 17.04 INSTALL WITH
THE "ENCRYPT HOME FOLDER" OPTION SELECTED.
In that case, I got the system hanging during boot, too, but when I finally
managed to login I got no swap at all ("systemctl status swapfile.swap"
returned "failed to activate swap /swapfile").
Looking at ubiquity scripts, I see that if encrypted home option is selected,
it runs also ecryptfs-setup-swap (so ubiquity is actually affected by the bug
described above); but the fact that system fails also to activate unencrypted
swap seems to suggest that Ubiquity may need to be patched too.
4)
** Description changed:
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, since choosing the "encrypt
- home folder" makes system hang a lot at boot (and when it finally starts
- it has no swap).
+ 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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https://bugs.launchpad.net/bugs/1670336
Title:
Ubiquity problem with encrypted home option: system hangs because of
ecryptfs-setup-swap not working with swapfiles
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