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

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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.

On Trixie:
    linux-image-6.12.74+deb13+1-rt-amd64

    root@5c1210865e65:/# find /lib/modules/6.12.74+deb13+1-rt-amd64/ -iname 'ip_tables*'
    /lib/modules/6.12.74+deb13+1-rt-amd64/kernel/net/ipv4/netfilter/ip_tables.ko.xz
    root@5c1210865e65:/#

On Forky:
    linux-modules-6.19.10+deb14-rt-amd64

    root@245245243fc6:/# find /lib/modules/6.19.10+deb14-rt-amd64/ -iname 'ip_tables*'
    root@245245243fc6:/#

On Forky i have to switch to the non-rt kernel, and docker and libvirt
start working again.

-- System Information:
Debian Release: forky/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.19.10+deb14-amd64 (SMP w/16 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)
LSM: AppArmor: enabled

Versions of packages linux-image-rt-amd64 depends on:
ii  linux-base-rt-amd64                 6.19.10-1
ii  linux-image-6.19.10+deb14-rt-amd64  6.19.10-1

linux-image-rt-amd64 recommends no packages.

linux-image-rt-amd64 suggests no packages.

-- no debconf information

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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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