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

Bjørn Mork bjorn at mork.no
Sat Sep 6 14:08:44 BST 2025


Package: systemd
Followup-For: Bug #1112535

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Dear Maintainer,


I hit this as well with the upgrade from 13.0 to 13.1.  Downgrading systemd 
from 257.8-1~deb13u1  to 257.7-1 again fixed the problem.  But this is very
hard to do without networking....

Which I believe justifies increasing the severity of this bug even more. It
completely breaks affected systems in hard to repair ways.  

I believe this bug might be relevant:
https://github.com/systemd/systemd/issues/38515

The failing system has a complex setup with VLANs on top of a bridge.

- -- Package-specific info:

- -- System Information:
Debian Release: 13.1
  APT prefers stable-security
  APT policy: (700, 'stable-security'), (700, 'stable'), (699, 'stable-updates')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.43+deb13-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages systemd depends on:
ii  libacl1            2.3.2-2+b1
ii  libapparmor1       4.1.0-1
ii  libc6              2.41-12
ii  libmount1          2.41-5
ii  libpam0g           1.7.0-5
ii  libseccomp2        2.6.0-2
ii  libselinux1        3.8.1-1
ii  libssl3t64         3.5.1-1
hi  libsystemd-shared  257.7-1
hi  libsystemd0        257.7-1
ii  mount              2.41-5

Versions of packages systemd recommends:
ii  chrony [time-daemon]            4.6.1-3
ii  dbus [default-dbus-system-bus]  1.16.2-2
ii  linux-sysctl-defaults           4.12
pn  systemd-cryptsetup              <none>

Versions of packages systemd suggests:
pn  libtss2-tcti-device0  <none>
pn  polkitd               <none>
pn  systemd-boot          <none>
ii  systemd-container     257.8-1~deb13u1
pn  systemd-homed         <none>
pn  systemd-repart        <none>
pn  systemd-resolved      <none>
pn  systemd-userdbd       <none>

Versions of packages systemd is related to:
ii  dbus-user-session  1.16.2-2
pn  dracut             <none>
ii  initramfs-tools    0.148.3
pn  libnss-systemd     <none>
ii  libpam-systemd     257.8-1~deb13u1
hu  udev               257.7-1

- -- Configuration Files:
/etc/systemd/journald.conf changed [not included]
/etc/systemd/networkd.conf changed [not included]

- -- no debconf information

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