Public bug reported:
When /etc/crypttab has more than one luks device, the boot process locks
up (hangs) after the decryption of the first luks device. A password
prompt for the second luks device never appears.
Affected:
Ubuntu 15.04 (vivid)
Ubuntu 15.10 (wily)
Works fine in:
Ubuntu 14.10 (utopic)
When upgrading utopic to vivid in the affected configuration, the bug is
triggered as well (first boot into vivid).
Testcase:
- install (text mode) from ubuntu-15.10-server-amd64.iso
- manually partition the disk (see attached installer-partitions.png):
-> sda1: 512mb ext2 for /boot/ (unencrypted)
-> sda2: 4GB encrypted (luks) -> sda2_crypt
-> sda3: 2GB encrypted (luks) -> sda3_crypt
-> sda2_crypt: ext4 for /
-> sda3_crypt: ext4 for /tmp
boot will hang (boot-hang.png) after decrypting sda2.
My real use-case is to encrypt multiple physical hard drivers, which
fails exactly the same way (the test config doesn't make much sense, but
its simple to reproduce).
Commenting sda3_crypt in /etc/fstab and adding a the option nofail to
sda3_crypt in /etc/crypttab makes the OS boot.
# cat /etc/crypttab
sda2_crypt UUID=b41558ee-eb5b-463a-a1a5-34e1cc6b05e9 none luks,discard
sda3_crypt UUID=c1c660d3-2e70-4761-85a2-6f635719f8cd none luks,discard
# cat /etc/fstab
# <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=56e38284-0cef-4e8a-b933-c82f70ef4588 /boot ext2 defaults
0 2
#/dev/mapper/sda3_crypt /tmp ext4 defaults 0 2
# blkid
/dev/mapper/sda2_crypt: UUID="8413bc48-13e7-4b19-aabc-42b6b19101a5" TYPE="ext4"
/dev/sda1: UUID="56e38284-0cef-4e8a-b933-c82f70ef4588" TYPE="ext2"
PARTUUID="ec85536d-0bb5-44c8-a3ba-93ae539e4ef1"
/dev/sda2: UUID="b41558ee-eb5b-463a-a1a5-34e1cc6b05e9" TYPE="crypto_LUKS"
PARTUUID="4f76f8cb-b170-4a07-a412-832ba2964377"
/dev/sda3: UUID="c1c660d3-2e70-4761-85a2-6f635719f8cd" TYPE="crypto_LUKS"
PARTUUID="ef6c816c-71d3-4d36-88e7-eb2ddae2a06a"
** Affects: cryptsetup (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "boot-hang.png"
https://bugs.launchpad.net/bugs/1525724/+attachment/4534337/+files/boot-hang.png
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https://bugs.launchpad.net/bugs/1525724
Title:
boot hangs with more than 1 luks device in crypttab
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