Bug#1112535: /usr/lib/systemd/systemd-networkd: segfault after upgrade to 257.8-1~deb13u1, no connectivity after reboot

[Jonathan Wiltshire]

Hi,

On Sun, Sep 07, 2025 at 11:58:46PM +0100, Luca Boccassi wrote:
> Control: severity -1 minor
> 
> On Sun, 07 Sep 2025 23:02:13 +0100 "Adam D. Barratt"
> <adam at adam-barratt.org.uk> wrote:
> > On Sun, 2025-09-07 at 22:52 +0100, Tim Small wrote:
> > > This was reported a good week before Debian 13.1 went out, so I'm a
> > > bit surprised it still went into that?
> > 
> > It was reported at a non release critical severity, tagged "moreinfo"
> > and neither the submitter nor the maintainer (nor anyone else) raised
> > it to the Release Team's attention.
> 
> There was absolutely no need to disturb RT and waste your time, as you
> have much more important things to take care of,

For future reference, a highly impactful issue in something we're about to
release (even if optional or esoteric) is absolutely something SRMs want to
know about in the week ahead. It doesn't have to be a drama, just please
draw our attention to it so we can keep an eye on developments. We would
rather know and disregard than not know at all.

> as this is just a
> minor issue with a particular corner case of a custom config of an
> optional component. Anybody who is unable to deal with that should just
> stick to the default Debian components.

This doesn't seem right. If the upstream test case is correct, the broken
configuration looks very much like example #6 in systemd.network(5). There
are no warnings that this might be experimental or unsupported.
systemd-networkd is called out as "The modern network configuration without
GUI" in the Debian reference. VLAN-aware bridges are absolutely a common
production use in dense environments. A reasonable user would expect this
to work without issue.

Whether you intended it or not you're now maintaining a critical component
for a lot of people in a production scenario.

> The next stable update in ~2
> months will contain a fix.

I think we need an accelerated stable-updates fix much sooner than that
please. The upstream patch is one line.

Thanks,

-- 
Jonathan Wiltshire                                      jmw at debian.org
Debian Developer                         http://people.debian.org/~jmw

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