Hi, same issue here in bionic 18.04 LTS on btrs subvolumes with the
following systemd releases:

 *** 237-3ubuntu10.10 100
        -10 http://archive.ubuntu.com/ubuntu bionic-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     237-3ubuntu10.9 500
        500 http://it.archive.ubuntu.com/ubuntu bionic-updates/main amd64 
Packages
        500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 
Packages

How can we apply the patch also in bionic?

Regards

Luca

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https://bugs.launchpad.net/bugs/1804603

Title:
  systemd-tmpfiles-setup.service fails on btrfs

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Bionic:
  Confirmed
Status in systemd source package in Cosmic:
  Fix Committed
Status in systemd source package in Disco:
  Fix Released

Bug description:
  [Impact]

   * Last security update introduced a regression on btrfs based systems, 
causing systemd-tmpfiles-setup.service to fail to start, resulting in degraded 
machines.
   * Cherrypick upstream fixes to resolve this.

  [Test Case]

   * Install VM using btrfs for /
   * Boot, check that systemd-tmpfiles-setup.service is started successfully 
with:
  $ systemctl status systemd-tmpfiles-setup.service

  [Regression Potential]

   * btrfs fd doesn't support the set of flags that systemd used, with
  this patch, a compat set of flags is set instead, thus resolving the
  introduced regression. The worst case scenario is that creating
  subvolumes/directories is still broken (as in, the current status
  quo).

  [Other Info]
   
   * Example bad output

  
  After update to systemd 237-3ubuntu10.9 systemd-tmpfiles-setup.service fails 
with:

  Nov 21 13:44:12 node-blc49 systemd[1]: Starting Create Volatile Files and 
Directories...
  Nov 21 13:44:12 node-blc49 systemd-tmpfiles[1226]: Failed to create directory 
or subvolume "/var": Bad file descriptor
  Nov 21 13:44:12 node-blc49 systemd-tmpfiles[1226]: Failed to create directory 
or subvolume "/home": Bad file descriptor
  Nov 21 13:44:12 node-blc49 systemd-tmpfiles[1226]: Failed to create directory 
or subvolume "/srv": Bad file descriptor
  Nov 21 13:44:12 node-blc49 systemd[1]: systemd-tmpfiles-setup.service: Main 
process exited, code=exited, status=1/FAILURE
  Nov 21 13:44:12 node-blc49 systemd[1]: systemd-tmpfiles-setup.service: Failed 
with result 'exit-code'.
  Nov 21 13:44:12 node-blc49 systemd[1]: Failed to start Create Volatile Files 
and Directories.

  This happens on btrfs root filesystems in real hardware and on our
  virtualized servers as well. 237-3ubuntu10.6 didnt show this errors
  and going back to 237-3ubuntu10 removes them as well.

  # lsb_release -rd
  Description:    Ubuntu 18.04.1 LTS
  Release:        18.04

  # apt-cache policy systemd
  systemd:
    Installiert:           237-3ubuntu10.9
    Installationskandidat: 237-3ubuntu10.9
    Versionstabelle:
   *** 237-3ubuntu10.9 500
          500 http://de.archive.ubuntu.com/ubuntu bionic-updates/main amd64 
Packages
          500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 
Packages
          100 /var/lib/dpkg/status
       237-3ubuntu10 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

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