Public bug reported:
[Impact]
Long-running services overflow the sd_bus->cookie counter, causing further
communication with org.freedesktop.systemd1 to stall.
[Description]
Systemd dbus messages usually include a "cookie" value to uniquely identify
them in their bus context. For services that run for longer periods of time and
keep communicating through dbus, it's possible to overflow the cookie value,
causing further messages to the org.freedesktop.systemd1 dbus to hang.
This has been fixed upstream by the commit below:
- sd-bus: deal with cookie overruns (1f82f5bb4237)
$ git describe --contains 1f82f5bb4237
v242-rc1~228
$ rmadison systemd
systemd | 229-4ubuntu4 | xenial | source, ...
systemd | 229-4ubuntu21.27 | xenial-security | source, ...
systemd | 229-4ubuntu21.27 | xenial-updates | source, ...
systemd | 229-4ubuntu21.28 | xenial-proposed | source, ...
systemd | 237-3ubuntu10 | bionic | source, ...
systemd | 237-3ubuntu10.38 | bionic-security | source, ...
systemd | 237-3ubuntu10.39 | bionic-updates | source, ...
systemd | 237-3ubuntu10.40 | bionic-proposed | source, ... <----
systemd | 242-7ubuntu3 | eoan | source, ...
Releases starting with Eoan already have this fix.
[Test Case]
There doesn't seem to be an easy test case for this, as the cookie values start
at zero and won't overflow until (1<<32). There have been reports from users
hitting this on Kubernetes clusters continuously running for longer periods (~5
months).
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Tags: sts
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https://bugs.launchpad.net/bugs/1876600
Title:
cookie overruns cause org.freedesktop.systemd1 dbus to hang
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