[Bug 1299557] Re: cryptsetup luksFormat fails with -s <keysize>

[mpb]

I ran into this problem again today and found my old bug report.  I
downloaded the source code for cryptsetup-1.6.7, and built it manually.

Version 1.6.7 gives me a more informative error message.

$ sudo ./cryptsetup -y -s 128 luksFormat /dev/sdd1

WARNING!
========
This will overwrite data on /dev/sdd1 irrevocably.

Are you sure? (Type uppercase yes): YES
Enter passphrase: 
Verify passphrase: 
Failed to setup dm-crypt key mapping for device /dev/sdd1.
Check that kernel supports aes-xts-plain64 cipher (check syslog for more info).
Key size in XTS mode must be 256 or 512 bits.

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https://bugs.launchpad.net/bugs/1299557

Title:
  cryptsetup luksFormat fails with -s <keysize>

Status in cryptsetup package in Ubuntu:
  Confirmed

Bug description:
  I installed beta2 of 14.04 yesterday.  Today, I am trying to manually
  create an encrypted partition.  If I specify a key size to cryptsetup
  with -s, cryptsetup fails as follows.

  root at slab:~# cryptsetup -y -s 128 luksFormat /dev/sda6
  WARNING!
  ========
  This will overwrite data on /dev/sda6 irrevocably.
  Are you sure? (Type uppercase yes): YES
  Enter passphrase:
  Verify passphrase:
  device-mapper: reload ioctl on  failed: Invalid argument
  Failed to open temporary keystore device.
  device-mapper: remove ioctl on temporary-cryptsetup-2231 failed: No such device or address
  device-mapper: reload ioctl on temporary-cryptsetup-2231 failed: No such device or address
  device-mapper: remove ioctl on temporary-cryptsetup-2231 failed: No such device or address
  device-mapper: remove ioctl on temporary-cryptsetup-2231 failed: No such device or address
  device-mapper: remove ioctl on temporary-cryptsetup-2231 failed: No such device or address
  device-mapper: remove ioctl on temporary-cryptsetup-2231 failed: No such device or address

  After the above, luksDump shows all 8 key slots as DISABLED.

  Without -s, cryptsetup will succeed, as follows.

  root at slab:~# cryptsetup -y luksFormat /dev/sda6
  WARNING!
  ========
  This will overwrite data on /dev/sda6 irrevocably.
  Are you sure? (Type uppercase yes): YES
  Enter passphrase:
  Verify passphrase:
  root at slab:~#

  Other info:

  root at slab:~# lsb_release -rd
  Description:    Ubuntu Trusty Tahr (development branch)
  Release:        14.04

  root at slab:~# apt-cache policy cryptsetup
  cryptsetup:
    Installed: 2:1.6.1-1ubuntu1
    Candidate: 2:1.6.1-1ubuntu1
    Version table:
   *** 2:1.6.1-1ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

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