Dear Maintainer,

Regression introduced in linux-image-5.10.0-43-amd64 (5.10.251-5).
Previous kernel linux-image-5.10.0-42-amd64 (5.10.251-4) works correctly.

Network card: Broadcom NetXtreme II BCM5716 (driver: bnx2)
Network config: /etc/network/interfaces with "allow-hotplug eno1" and "iface eno1 inet dhcp"

On boot with 5.10.0-43, ifupdown-hotplug fails with exit code 1 and
the interface eno1 gets no IP address, making the server completely
unreachable via network.

Relevant boot log (journalctl -b):
  kernel: bnx2 0000:02:00.0 eno1: renamed from eth0
  systemd-udevd[289]: eno1: Process 'ifupdown-hotplug' failed with exit code 1

Workaround: boot on 5.10.0-42-amd64 via GRUB_DEFAULT in /etc/default/grub.

Note: this bug is reported from kernel 5.10.0-42 since 5.10.0-43 makes
the server unreachable at boot.

Control: tag -1 moreinfo

As you can see in the changelog, there were no changes to this network
driver nor to any other networking code between these 2 versions.

So I think that this apparent regression is really just a bug that
occurs rarely and happened to occur when you booted the new version.

Did you try to boot the new version more than once?

Ben.

Le 21/05/2026 à 18:32, Ben Hutchings a écrit :
Hello Ben,

Yes, I’ve tried several times with the linux-image-5.10.0-43-amd64
version, but the server doesn’t complete the boot process and displays
the errors mentioned.

It is then necessary to boot into rescue mode to restore the system and
instruct GRUB to boot into the linux-image-5.10.0-42-amd64 version.

I’m not saying it’s necessarily the kernel itself, but the only thing
I’ve found regarding the crashes is linked to these errors.

Control: tag -1 moreinfo
[...]

Please send the full boot log, because the 2 lines you originally quoted
don't explain anything to me.

Ben.