[Bug 474258] Re: Extremely dangerous! cryptswap killed my partition

[Cezary Baginski]

@Tuomas:

I agree - LVM is a cleaner solution (although at first, I thought the
lvm handling would need too much code).

Good points about linking and /dev/dm*.

@bugfix

It turns out there is an obvious bug with detecting filesystems before
running mkswap.

My take on fixing it:
https://code.launchpad.net/~cezary0/cryptsetup/bugfix474258

The patch probably applies cleanly to almost every version, so you can
apply it locally already.

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https://bugs.launchpad.net/bugs/474258

Title:
  Extremely dangerous! cryptswap killed my partition

Status in “cryptsetup” package in Ubuntu:
  Triaged
Status in “cryptsetup” source package in Precise:
  Triaged
Status in “cryptsetup” package in Debian:
  New

Bug description:
  Binary package hint: cryptmount

  9.10 installed with encrypted "home".
  Had root on /dev/sda1, swap on /dev/sda2, and manually created "data" partition on "/dev/sda3"
  When I deleted /dev/sda2 partition (wanted to move swap to the second HDD) - ubuntu killed my "data" partition!
  I suppose the problem is that /dev/sda3 became /dev/sda2 and the cryptswap utility just killed all the data (about 80 gigs!), because /dev/sda2 is in the /etc/crypttab file as a swap partition...
  Cryptswap should check the type of partition before mounting it as swap.

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