Bug#708722: installation-reports: Fail to mount encrypted /tmp file system, wrong fs in crypttab

[Lars Stollenwerk <LSto@Opppf.de>]

Package: installation-reports
Severity: normal

Dear Maintainer,

I installed debain with encrypted hard disk. The /tmp directory is mounted to
a separate partition with a random key. In /etc/crypttab the line

    sda3_crypt /dev/sda3 /dev/urandom cipher=aes-xts-plain64,size=256,tmp

was generated, in /etc/fstab the line

    /dev/mapper/sda3_crypt /tmp            ext2    defaults        0       2

was generated. During boot I got the message 

    Mounting local filesystems...mount: wrong fs type, bad option, bad
    superblock on /dev/mapper/sda3_crypt, 
    missing codepage or helper program, or other error
    [...]

And indeed, the /tmp file system was not mounted. According to crypttab(5), I
changed the corresponding line in /etc/crypttab to

    sda3_crypt /dev/sda3 /dev/urandom cipher=aes-xts-plain64,size=256,tmp=ext2

Now the /tmp file system is mounted on boot as expected.


It seems to me that the original crypttab entry is either invalid (as the
option 'tmp' needs to be followed by '=<tmpfs>') or the default file system for
tmp is not ext2.

For the sake of completeness I append /etc/crypttab and /etc/fstab. The only
manual change I have made is the above mentioned line in crypttab.

Thank you for the (otherwise) really great automated installation process.

Sincerely
Lars

--- /etc/crypttab ------------------------------------------------------------

sda2_crypt UUID=afc745bf-6b36-4f43-a483-b49d28ab7eea none luks
sda3_crypt /dev/sda3 /dev/urandom cipher=aes-xts-plain64,size=256,tmp=ext2
sda5_crypt /dev/sda5 /dev/urandom cipher=aes-xts-plain64,size=256,swap

--- /etc/fstab ---------------------------------------------------------------

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/sda2_crypt /               ext4    errors=remount-ro 0       1
# /boot was on /dev/sda1 during installation
UUID=04d34b71-b02b-4f10-8a04-d399793a087c /boot           ext4    defaults        0       2
/dev/mapper/sda3_crypt /tmp            ext2    defaults        0       2
/dev/mapper/sda5_crypt none            swap    sw              0       0
/dev/sr0        /media/cdrom0   udf,iso9660 user,noauto     0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto  0       0


-- Package-specific info:

Boot method: CD
Image version: 7.8.0 "Wheezy" - Official i386 NETINST Binary-1 20150110-13:31
Date: 2015-03-07

==============================================
Installer lsb-release:
==============================================
DISTRIB_ID=Debian
DISTRIB_DESCRIPTION="Debian GNU/Linux installer"
DISTRIB_RELEASE="7 (wheezy) - installer build 20130613+deb7u2+b4"
X_INSTALLATION_MEDIUM=cdrom


-- System Information:
Debian Release: 7.8
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-4-686-pae (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash