[Bug 1554861] [NEW] Systemd crashes with a simple set of target units

[Jeremy L]

Public bug reported:

We are seeing systemd on the Ubuntu 16.04 crash when starting a very
basic collection of service units. The crash appears in the logs as
follows:

  systemd[1]: Assertion '*v' failed at ../src/core/timer.c:337, function add_random(). Aborting.
  systemd[1]: Caught <ABRT>, dumped core as pid 2284.
  systemd[1]: Freezing execution.

This appears to be related to the upstream systemd issue #2632:
https://github.com/systemd/systemd/issues/2632

We can reproduce this bug readily using the attached crashme.sh script.
This bug was verified in the Ubuntu 16.04 daily build 20160308.1.

root at ubuntu-xenial:~# lsb_release -rd
Description:	Ubuntu Xenial Xerus (development branch)
Release:	16.04

root at ubuntu-xenial:~# apt-cache policy systemd
systemd:
  Installed: 229-2ubuntu1
  Candidate: 229-2ubuntu1
  Version table:
 *** 229-2ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

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

** Attachment added: "crashme.sh"
   https://bugs.launchpad.net/bugs/1554861/+attachment/4593320/+files/crashme.sh

** Description changed:

  We are seeing systemd on the Ubuntu 16.04 crash when starting a very
  basic collection of service units. The crash appears in the logs as
  follows:
  
-         Mar 02 02:24:27 dcos-master-01234567-0 systemd[1]: Assertion '*v' failed at ../src/core/timer.c:337, function add_random(). Aborting.
-         Mar 02 02:24:28 dcos-master-01234567-0 systemd[1]: Caught <ABRT>, dumped core as pid 2284.
-         Mar 02 02:24:28 dcos-master-01234567-0 systemd[1]: Freezing execution.
+   systemd[1]: Assertion '*v' failed at ../src/core/timer.c:337, function add_random(). Aborting.
+   systemd[1]: Caught <ABRT>, dumped core as pid 2284.
+   systemd[1]: Freezing execution.
  
  This appears to be related to the upstream systemd issue #2632:
  https://github.com/systemd/systemd/issues/2632
  
  We can reproduce this bug readily using the attached crashme.sh script.
  This bug was verified in the Ubuntu 16.04 daily build 20160308.1.
  
  root at ubuntu-xenial:~# lsb_release -rd
  Description:	Ubuntu Xenial Xerus (development branch)
  Release:	16.04
  
  root at ubuntu-xenial:~# apt-cache policy systemd
  systemd:
-   Installed: 229-2ubuntu1
-   Candidate: 229-2ubuntu1
-   Version table:
-  *** 229-2ubuntu1 500
-         500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
-         100 /var/lib/dpkg/status
+   Installed: 229-2ubuntu1
+   Candidate: 229-2ubuntu1
+   Version table:
+  *** 229-2ubuntu1 500
+         500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
+         100 /var/lib/dpkg/status

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https://bugs.launchpad.net/bugs/1554861

Title:
  Systemd crashes with a simple set of target units

Status in systemd package in Ubuntu:
  New

Bug description:
  We are seeing systemd on the Ubuntu 16.04 crash when starting a very
  basic collection of service units. The crash appears in the logs as
  follows:

    systemd[1]: Assertion '*v' failed at ../src/core/timer.c:337, function add_random(). Aborting.
    systemd[1]: Caught <ABRT>, dumped core as pid 2284.
    systemd[1]: Freezing execution.

  This appears to be related to the upstream systemd issue #2632:
  https://github.com/systemd/systemd/issues/2632

  We can reproduce this bug readily using the attached crashme.sh
  script. This bug was verified in the Ubuntu 16.04 daily build
  20160308.1.

  root at ubuntu-xenial:~# lsb_release -rd
  Description:	Ubuntu Xenial Xerus (development branch)
  Release:	16.04

  root at ubuntu-xenial:~# apt-cache policy systemd
  systemd:
    Installed: 229-2ubuntu1
    Candidate: 229-2ubuntu1
    Version table:
   *** 229-2ubuntu1 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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