Public bug reported:
Package: linux-hwe-6.11
Affected version: 6.11.0-24.24~24.04.1
Bug Summary:
The br_netfilter.ko kernel module is missing from
linux-modules-extra-6.11.0-24-generic, despite being enabled in the kernel
config as a loadable module. This prevents containers (e.g., Docker) from
starting due to failure to initialize networking.
Steps to Reproduce:
Install Ubuntu 24.04 LTS and the HWE kernel 6.11.0-24-generic.
Attempt to load the br_netfilter module:
modprobe br_netfilter
Observe failure:
modprobe: FATAL: Module br_netfilter not found in directory
/lib/modules/6.11.0-24-generic
Confirm it's not in the linux-modules-extra package:
dpkg -L linux-modules-extra-6.11.0-24-generic | grep br_netfilter
# No output
Confirm kernel config includes it:
grep BRIDGE_NETFILTER /boot/config-6.11.0-24-generic
CONFIG_BRIDGE_NETFILTER=m
Expected Result:
br_netfilter.ko should exist in
/lib/modules/6.11.0-24-generic/kernel/net/netfilter/ and be loadable with
modprobe.
Actual Result:
Module is missing, even after reinstalling the relevant packages:
Confirm it's not in the linux-modules-extra package:
apt-get install --reinstall linux-modules-6.11.0-24-generic
linux-modules-extra-6.11.0-24-generic
Impact:
Systems relying on Docker or Kubernetes fail to initialize container
networking. This affects server and development workloads on Ubuntu 24.04 using
the HWE stack.
Workaround:
Boot into an older kernel (e.g., 6.8.0-58-generic), where br_netfilter.ko is
present and Docker functions normally.
System Info:
OS: Ubuntu 24.04 LTS
Kernel: 6.11.0-24-generic
Architecture: x86_64
ChatGPT: Was used (I never filed any bug reports here, hopefully I didn't make
a pigsty of it lol)
** Affects: linux-hwe-6.11 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2109778
Title:
br_netfilter.ko missing from linux-modules-extra-6.11.0-24-generic on
Ubuntu 24.04 (HWE kernel)
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