apparmor.d/profiles/child-systemctl

# vim:syntax=apparmor
# ------------------------------------------------------------------
#
#    Copyright (C) 2019-2021 Mikhail Morfikov
#
#    This program is free software; you can redistribute it and/or
#    modify it under the terms of version 2 of the GNU General Public
#    License published by the Free Software Foundation.
#
# ------------------------------------------------------------------

# Note: This profile does not specify an attachment path because it is
# intended to be used only via "Px -> child-systemctl" exec transitions
# from other profiles. We want to confine the systemctl(1) utility when
# it is invoked from other confined applications, but not when it is
# used in regular (unconfined) shell scripts or run directly by the user.

abi <abi/3.0>,

include <tunables/global>

# Do not attach to /{usr/,}bin/systemctl by default
profile child-systemctl {
  include <abstractions/base>
  include <abstractions/consoles>
  include <abstractions/wutmp>

  capability sys_ptrace,

  ptrace (read),

  /{usr/,}bin/systemctl mr,

  owner @{PROC}/@{pid}/stat r,
        @{PROC}/sys/kernel/osrelease r,
        @{PROC}/1/environ r,
        @{PROC}/1/sched r,
        @{PROC}/cmdline r,

  @{sys}/firmware/efi/efivars/SecureBoot-[0-9a-f]*-[0-9a-f]*-[0-9a-f]*-[0-9a-f]*-[0-9a-f]* r,

  /dev/kmsg w,

  include if exists <local/child-systemctl>
}