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Groups > linux.debian.kernel > #84843

Bug#1090183: nftables connection tracking fails after kernel update to 6.1.119-1

From Tibor <oomtig@gmail.com>
Newsgroups linux.debian.bugs.dist, linux.debian.kernel
Subject Bug#1090183: nftables connection tracking fails after kernel update to 6.1.119-1
Date 2024-12-16 15:50 +0100
Message-ID <JUkA1-hyMh-5@gated-at.bofh.it> (permalink)
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

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Package: linux-image-6.1.0-28-amd64
Version: 6.1.119-1
Severity: important

After upgrading from linux-image-6.1.0-27-amd64 to
linux-image-6.1.0-28-amd64, nftables connection tracking ('ct state')
functionality stopped working. The issue appears to be related to recent
netfilter security patches.

Steps to reproduce:
1. Update kernel to 6.1.119-1
2. Reboot system
3. Attempt to use nftables rules with 'ct state'

Current behavior:
- Error message: "could not process rule: No such file or directory"
- nftables rules using 'ct state' fail to load
- Basic firewall functionality without connection tracking works

Expected behavior:
- nftables rules with 'ct state' should load and function properly
- Connection tracking should work as it did in previous kernel version

System information:
- Debian 12 (bookworm)
- Previous kernel: linux-image-6.1.0-27-amd64 (6.1.115-1)
- Current kernel: linux-image-6.1.0-28-amd64 (6.1.119-1)
- nftables version: 1.0.6

Related changes in current version:
- Security fixes for netfilter IPv6 (use-after-free in ip6table_nat)
- Changes to nf_reject_ipv6 TCP header handling

nf_conntrack and related modules are loaded:
[output of lsmod | grep -E 'nf_|netfilter|nft']

Additional notes:
- System has module loading disabled (kernel.modules_disabled=1)
- Required modules are preloaded in initramfs
- Configuration worked correctly in previous kernel version

Proposed temporary solution:
Reverting to linux-image-6.1.0-27-amd64 restores functionality.

Please advise on proper configuration for connection tracking with the new
security patches, or confirm if this is a regression that needs to be
addressed.

This report has been co authored with AI support.

Kind regards,

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Thread

Bug#1090183: nftables connection tracking fails after kernel update to 6.1.119-1 Tibor <oomtig@gmail.com> - 2024-12-16 15:50 +0100
  Bug#1090183: nftables connection tracking fails after kernel update to 6.1.119-1 Salvatore Bonaccorso <carnil@debian.org> - 2024-12-16 18:00 +0100
  Processed: Re: Bug#1090183: nftables connection tracking fails  after kernel update to 6.1.119-1 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-12-16 18:00 +0100
  Bug#1090183: Info received (Bug#1090183: nftables connection tracking fails after kernel update to 6.1.119-1) Tibor <oomtig@gmail.com> - 2024-12-17 14:00 +0100

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