[Bug 1825189] Re: Using full disk encryption, on a multipath device (in this case FCP) ended up in trying to open/unlock a wrong DM device

[Launchpad Bug Tracker]

This bug was fixed in the package multipath-tools - 0.7.9-3ubuntu2

---------------
multipath-tools (0.7.9-3ubuntu2) eoan; urgency=medium

  * Ensure udebs have the same udev rules as installed systems. LP:
    #1825189

 -- Dimitri John Ledkov <xnox at ubuntu.com>  Tue, 21 May 2019 12:34:41
+0100

** Changed in: multipath-tools (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1825189

Title:
  Using full disk encryption, on a multipath device (in this case FCP)
  ended up in trying to open/unlock a wrong DM device

Status in Ubuntu on IBM z Systems:
  New
Status in debian-installer package in Ubuntu:
  New
Status in multipath-tools package in Ubuntu:
  Fix Released

Bug description:
  When doing a full disk encrypted installation with d-i using
  "Guided - use entire disk and setup encrypted LVM"
  on a multipath device (in this case zFCP/SCSI)
  the post-install reboot ends in busybox/initramfs
  while trying to open/unlock an incorrect device-maper device.
  initrd tries to open /dev/mapper/mpatha5 but only /dev/mapper/mpatha-part5 exists.

  Fixing the wrong device in crypttab like:
  echo "mpatha5_crypt /dev/mapper/mpatha-part5 none luks,discard" > ./
  cryptroot/crypttab
  and trying to open it manually:
  cryptsetup open --key-file /etc/zkey/repository/mpatha5_crypt.skey --key-size 1024 --cipher paes-xts-plain64 /dev/mapper/mpatha-part5 mpatha5_crypt
  and leaving busybox again seems to work.

  For more details see attachment ...

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