Ubuntu
ecryptfs-utils package

ecryptfs-setup-swap fails when activating swap

Bug #1886723 reported by Alberto Pianon on 2020-07-07

This bug affects 4 people

Affects		Status	Importance	Assigned to	Milestone
	eCryptfs	New	Undecided	Unassigned
	ecryptfs-utils (Ubuntu)	Confirmed	Undecided	Unassigned

Bug Description

ecryptfs-setup-swap fails when activating swap at the end, giving the following error message:

swapon: cannot open /dev/mapper/cryptswap1: No such file or directory

However, after a reboot, encrypted swap works.

This happens because cryptsetup service works slightly differently now, and, after modifying /etc/crypttab, it is required to call "systemctl daemon-reload" before restarting cryptsetup service at the end of ecryptfs-setup-swap script.

SOLUTION:

add "systemctl daemon-reload" before "systemctl restart cryptsetup.target"

Tags:

Revision history for this message

Alberto Pianon (alberto-o) wrote on 2020-07-07:

cryptsetup-generator.patch Edit (478 bytes, text/plain)

I created a patch for the ubuntu package. It must be applied after existing swapfile-support.patch

Revision history for this message

Ubuntu Foundations Team Bug Bot (crichton) wrote on 2020-07-08:

The attachment "cryptsetup-generator.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

tags:

added: patch

Revision history for this message

Launchpad Janitor (janitor) wrote on 2022-08-24:

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in ecryptfs-utils (Ubuntu):
status:	New → Confirmed

Revision history for this message

Chris Watts (cjxd) wrote on 2022-10-14:

I had this problem on a fresh install of Ubuntu 22.04 today. I'm using LVM.

```
+ sudo ecryptfs-setup-swap

WARNING:
An encrypted swap is required to help ensure that encrypted files are not leaked to disk in an unencrypted format.

HOWEVER, THE SWAP ENCRYPTION CONFIGURATION PRODUCED BY THIS PROGRAM WILL BREAK HIBERNATE/RESUME ON THIS SYSTEM!

NOTE: Your suspend/resume capabilities will not be affected.

Do you want to proceed with encrypting your swap? [y/N]: y

INFO: Setting up swap: [/dev/dm-1]
WARNING: Commented out your unencrypted swap from /etc/fstab
swapon: cannot open /dev/mapper/cryptswap1: No such file or directory
```

fstab after:

```
/dev/mapper/vgubuntu-root / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=DD8B-183F /boot/efi vfat umask=0077 0 1
#/dev/mapper/vgubuntu-swap_1 none swap sw 0 0
/dev/mapper/cryptswap1 none swap sw 0 0
```