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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - systemd pid 1 breaks after receiving sigquit"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=87603">87603</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>systemd pid 1 breaks after receiving sigquit
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>systemd
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>critical
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>general
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>systemd-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>grossws@gmail.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>systemd-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Component: systemd pid 1

OS: centos 7.0

Summary: systemd --system dbus interface not working after systemd received
SIGQUIT (3) from root.

E. g. `kill -SIGQUIT 1` by root leads to logging something like this:

Dec 22 20:31:39 test systemd[1]: Caught <QUIT>, dumped core as pid 3871.
Dec 22 20:31:39 test systemd[1]: Freezing execution.


After that `systemctl` is useless since systemd isn't responding to dbus
interface:

[root@test ~]# systemctl reboot
Failed to get D-Bus connection: Failed to connect to socket
/run/systemd/private: Connection refused

Also, `reboot` doesn't work:

[root@test ~]# reboot
Failed to open /dev/initctl: No such device or address
Failed to talk to init daemon.


Reproduce: run `kill -SIGQUIT 1` under root.

Env: 
- Linux test 3.10.0-123.9.3.el7.x86_64 #1 SMP Thu Nov 6 15:06:03 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
- systemd-208-11.el7_0.5.x86_64

See also: <a href="https://gist.github.com/grossws/545fdcbc2c5d2703c89c">https://gist.github.com/grossws/545fdcbc2c5d2703c89c</a></pre>
        </div>
      </p>
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