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From: Michael Biebl &lt;biebl@debian.org&gt;
To: Debian Bug Tracking System &lt;submit@bugs.debian.org&gt;
Subject: Breaks lxc-templates
Message-ID: &lt;177766600233.82382.16576001383391022112.reportbug@mars&gt;
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Date: Fri, 01 May 2026 22:06:42 +0200
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Package: lxc
Version: 1:7.0.0-1
Severity: serious


Hi,

I have several debian containers that were created via
autopkgtest-build-lxc debian $release.

The latest release of lxc broke all those container.
They fail to start, upgrade, destroy or inspect.

Here is an example:

# lxc-ls
lxc-ls: ../src/lxc/confile.c: set_config_unsupported_key: 165 Invalid argument - Unsupported config key &quot;lxc.cgroup.devices.allow&quot;
lxc-ls: ../src/lxc/parse.c: lxc_file_for_each_line_mmap: 135 Failed to parse config file &quot;/usr/share/lxc/config/debian.common.conf&quot; at line &quot;lxc.cgroup.devices.allow = c 254:0 rm&quot;
lxc-ls: ../src/lxc/parse.c: lxc_file_for_each_line_mmap: 135 Failed to parse config file &quot;/var/lib/lxc/autopkgtest-sid/config&quot; at line &quot;lxc.include = /usr/share/lxc/config/debian.common.conf&quot;
Failed to load config for autopkgtest-trixie


/usr/share/lxc/config/debian.common.conf is shipped by lxc-templates and
included in the container configuration.

For example, the trixie lxc container using
/var/lib/lxc/autopkgtest-trixie/config:


# Template used to create this container: /usr/share/lxc/templates/lxc-debian
# Parameters passed to the template: -r trixie
# For additional config options, please look at lxc.container.conf(5)

# Uncomment the following line to support nesting containers:
#lxc.include = /usr/share/lxc/config/nesting.conf
# (Be aware this has security implications)

lxc.net.0.type = veth
lxc.net.0.hwaddr = XX:XX:XX:XX:XX:XX
lxc.net.0.link = lxcbr0
lxc.net.0.flags = up
lxc.apparmor.profile = generated
lxc.apparmor.allow_nesting = 1
lxc.rootfs.path = dir:/var/lib/lxc/autopkgtest-trixie/rootfs

# Common configuration
lxc.include = /usr/share/lxc/config/debian.common.conf

# Container specific configuration
lxc.tty.max = 4
lxc.uts.name = autopkgtest-trixie
lxc.arch = amd64
lxc.pty.max = 1024




-- System Information:
Debian Release: forky/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 7.0.3+deb14-amd64 (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.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 lxc depends on:
ii  debconf [debconf-2.0]        1.5.92
ii  dnsmasq-base [dnsmasq-base]  2.92-4
ii  iproute2                     7.0.0-1
ii  iptables                     1.8.13-1
ii  libapparmor1                 4.1.7-2
ii  libc6                        2.42-15
ii  libcap2                      1:2.78-1
ii  libdbus-1-3                  1.16.2-4
ii  libgcc-s1                    16-20260425-1
ii  liblxc-common                1:7.0.0-1
ii  liblxc1t64                   1:7.0.0-1
ii  libseccomp2                  2.6.0-2+b1
ii  libselinux1                  3.10-1
ii  nftables                     1.1.6-1+b1

Versions of packages lxc recommends:
ii  apparmor       4.1.7-2
ii  debootstrap    1.0.143
ii  dirmngr        2.4.9-4
pn  distrobuilder  &lt;none&gt;
ii  gnupg          2.4.9-4
ii  libpam-cgfs    1:7.0.0-1
ii  lxcfs          7.0.0-1
ii  openssl        3.6.2-1
ii  rsync          3.4.2+ds1-2
ii  uidmap         1:4.19.3-2
ii  wget           1.25.0-2

Versions of packages lxc suggests:
ii  btrfs-progs  6.19.1-1
ii  criu         4.2-3
ii  lvm2         2.03.31-2+b2
pn  python3-lxc  &lt;none&gt;

-- debconf information excluded
]