Groups > linux.debian.kernel > #91955

Bug#1132816: linux-image-rt-amd64: missing ip_tables.ko in linux-image-rt-amd64

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From	Ben Hutchings <ben@decadent.org.uk>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1132816: linux-image-rt-amd64: missing ip_tables.ko in linux-image-rt-amd64
Date	Wed, 08 Apr 2026 14:20:02 +0200
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Control: tag -1 upstream wontfix

On Sun, 2026-04-05 at 21:03 -0600, Sebastian Kuzminsky wrote:
> Package: linux-image-rt-amd64
> Version: 6.19.10-1
> Severity: normal
> X-Debbugs-Cc: debian-amd64@lists.debian.org, seb@highlab.com
> User: debian-amd64@lists.debian.org
> Usertags: amd64
> 
> I recently upgraded from Trixie to Forky, and libvirt and docker broke.
> 
> I've tracked the problem down to a bug (i think?) in the
> linux-image-rt-amd64 kernel package that I use. In Trixie, the -rt
> kernel includes ip_tables.ko, but in Forky it does not, and everything
> that relies on iptables-legacy breaks. This includes docker and libvirt.
[...]

xtables (including iptables) did not work correctly on RT, so this
combination has been intentionally disabled upstream.  See
<https://git.kernel.org/linus/9fce66583f06c212e95e4b76dd61d8432ffa56b6>.

The xtables APIs are generally deprecated now, so docker and libvirt
should use nftables by default.  Bug #1130974 tracks this for libvirt. 
For docker I think this was supposed to be addressed with bug #921600,
but there is still the related bug #903635 open.

Ben.

-- 
Ben Hutchings
Everything should be made as simple as possible, but not simpler.
                                                      - Albert Einstein

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Bug#1132816: linux-image-rt-amd64: missing ip_tables.ko in linux-image-rt-amd64 Sebastian Kuzminsky <seb@highlab.com> - 2026-04-06 05:10 +0200
  Processed: Re: Bug#1132816: linux-image-rt-amd64: missing  ip_tables.ko in linux-image-rt-amd64 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-04-08 14:20 +0200
  Bug#1132816: linux-image-rt-amd64: missing ip_tables.ko in linux-image-rt-amd64 Ben Hutchings <ben@decadent.org.uk> - 2026-04-08 14:20 +0200

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