Public bug reported:

Hello,

Ubuntu 15.10
cryptsetup 2:1.6.6-5ubuntu2

First, I post a question here without any success:
http://askubuntu.com/questions/693950/impossible-to-boot-on-encrypted-root-partition-after-15-10-upgrade

With the help of TJ- on IRC, I got more information but no solution.
This configuration was working since the 14.04 installation.

The boot sequence is stopped during the initramfs process whitin the
/usr/share/initramfs-tools/scripts/local-top/cryptroot script, between
the instant when the good password is validated and the initramfs'
bottom sequence. At that moment, I can only reboot.

I can mount and work on my partitions from a 15.10 live dvd.

My crypt setup:

/dev/mapper/crypt_root is active and is in use. 
  type:    LUKS1
  cipher:  aes-xts-plain64
  keysize: 512 bits
  device:  /dev/sdb3
  offset:  4096 sectors
  size:    491304960 sectors
  mode:    read/write
/dev/mapper/crypt_home is active and is in use.
  type:    LUKS1
  cipher:  aes-cbc-essiv:sha256
  keysize: 256 bits
  device:  /dev/sda7
  offset:  4096 sectors
  size:    1130182656 sectors
  mode:    read/write


My /etc/initramfs-tools/modules was empty before the 15.10 upgrade, now it 
contains:

cryptoloop
aes
sha256
aes-x86_64
sha512-ssse3
dm-mod
dm-crypt

My partition should be mounted like this:

/dev/mapper/crypt_root on / type ext4 (rw,relatime,data=ordered)
/dev/mapper/crypt_home on /home type ext4 (rw,relatime,data=ordered)
/dev/sdb2 on /boot type ext4 (rw,relatime,stripe=4,data=ordered)
/dev/sda2 on /boot/efi type vfat 
(rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
udev on /dev type devtmpfs 
(rw,nosuid,relatime,size=4039992k,nr_inodes=1009998,mode=755)
devpts on /dev/pts type devpts 
(rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=810576k,mode=755)

Best regards

** Affects: cryptsetup (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "crypttab"
   https://bugs.launchpad.net/bugs/1513415/+attachment/4513313/+files/crypttab

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https://bugs.launchpad.net/bugs/1513415

Title:
  cryptsetup blocks between mountroot and bottom in initramfs

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