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LXC 4.0.4 LTS has been released

04.08.2020

Introduction

The LXC team is pleased to announce the release of LXC 4.0.4!

This is the fourth bugfix release for LXC 4.0 which is supported until June 2025.

Bugfixes

Some of the highlights for this release are:

  • Support for new Linux clone flags (clone into cgroup)
  • Support for new Linux VFS system calls
  • Internal symbols are now properly hidden from external consumers

The full list of commits is available below:

Detailed changelog
  • get the right path in get_cgroup command
  • lxc: support CLONE_INTO_CGROUP
  • start: initialize cgroup_fd
  • start: use __aligned_u64
  • attach: set no_new_privs flag after LSM label
  • templates/lxc-download.in: fix wrong if condition (use the result of the gpg command, not the result when executing the result of the gpg command)
  • templates/lxc-download.in: make shellcheck happy
  • templates/lxc-download.in: use GPG option --receive-keys instead of --recv-keys
  • cgroups: update terminology
  • cgroups: update terminology II
  • seccomp: support allowlist/denylist in profiles
  • cgroups: use empty {} to initialize struct
  • cgroup2_devices: fix access rule parsing
  • api-extensions: add seccomp_allow_deny_syntax extension
  • cgroups: fix bpf device program generation
  • cgroups: handle empty bpf log buffer
  • tree-wide: s/ptmx/ptx/g
  • tree-wide: s/pts/pty/g
  • openpty: fix faulty rename
  • openpty: improve implementation and handling of platforms without it
  • checkconfig: Show LXC version in output.
  • autotools: include COPYING file
  • Improve efficiency of lxc_ifname_alnum_case_sensitive
  • network: remove unused variable
  • compiler: add and use __hidden visbility
  • string_utils: make all helpers hidden
  • af_unix: hide unnecessary symbols
  • attach: hide unnecessary symbols
  • caps: hide unnecessary symbols
  • commands: hide unnecessary symbols
  • commands_utils: hide unnecessary symbols
  • conf: hide unnecessary symbols
  • Makefile.am: Fix typo
  • start: check correct flags when receiving network devices
  • lxc-ls: bugfixes
  • confile: hide unnecessary symbols
  • confile_utils: hide unnecessary symbols
  • criu: hide unnecessary symbols
  • error: hide unnecessary symbols
  • file_utils: hide unnecessary symbols
  • initutils: hide unnecessary symbols
  • log: hide unnecessary symbols
  • lxclock: hide unnecessary symbols
  • lxcseccomp: hide unnecessary symbols
  • mainloop: hide unnecessary symbols
  • monitor: hide unnecessary symbols
  • namespace: hide unnecessary symbols
  • network: hide unnecessary symbols
  • parse: hide unnecessary symbols
  • process_utils: hide unnecessary symbols
  • rexec: hide unnecessary symbols
  • ringbuf: hide unnecessary symbols
  • start: hide unnecessary symbols
  • state: hide unnecessary symbols
  • sync: hide unnecessary symbols
  • terminal: hide unnecessary symbols
  • utils: hide unnecessary symbols
  • uuid: hide unnecessary symbols
  • cgroups: hide unnecessary symbols
  • lsm: hide unnecessary symbols
  • arguments: hide unnecessary symbols
  • storage: hide unnecessary symbols
  • tree-wide: hide further unnecessary symbols
  • start: simplify gotos
  • apparmor: Allow ro remount of boot_id
  • syscalls: add fsopen()
  • syscalls: add fspick()
  • syscalls: add fsconfig()
  • syscalls: add fsmount()
  • mount_utils: add mount utils
  • mount_utils: add mount_filesystem() helper
  • attach: use new mount api
  • log: don't break logging by hiding symbols
  • Makefile: fix Makefile
  • selinux: remove security_context_t usage as it's deprecated
  • seccomp: remove seccomp fd from event loop after task exited
  • seccomp: add missing header
  • syscall: don't fail if __NR_signalfd is not defined
  • conf: ensure that the idmap pointer itself is freed

Support and upgrade

The LXC 4.0 branch is supported until June 2025.
Only bugfixes and securitiy issues get included into the stable bugfix releases, so it's always safe and recommended to keep up and run the latest bugfix release.

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