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systemd/units/systemd-logind.service.in
Lennart Poettering 0c28d51ac8 units: further lock down our long-running services
Let's make this an excercise in dogfooding: let's turn on more security
features for all our long-running services.

Specifically:

- Turn on RestrictRealtime=yes for all of them

- Turn on ProtectKernelTunables=yes and ProtectControlGroups=yes for most of
  them

- Turn on RestrictAddressFamilies= for all of them, but different sets of
  address families for each

Also, always order settings in the unit files, that the various sandboxing
features are close together.

Add a couple of missing, older settings for a numbre of unit files.

Note that this change turns off AF_INET/AF_INET6 from udevd, thus effectively
turning of networking from udev rule commands. Since this might break stuff
(that is already broken I'd argue) this is documented in NEWS.
2016-09-25 10:52:57 +02:00

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SYSTEMD

# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
[Unit]
Description=Login Service
Documentation=man:systemd-logind.service(8) man:logind.conf(5)
Documentation=http://www.freedesktop.org/wiki/Software/systemd/logind
Documentation=http://www.freedesktop.org/wiki/Software/systemd/multiseat
Wants=user.slice
After=nss-user-lookup.target user.slice
# Ask for the dbus socket. If running over kdbus, the socket will
# not be actually used.
Wants=dbus.socket
After=dbus.socket
[Service]
ExecStart=@rootlibexecdir@/systemd-logind
Restart=always
RestartSec=0
BusName=org.freedesktop.login1
WatchdogSec=3min
CapabilityBoundingSet=CAP_SYS_ADMIN CAP_MAC_ADMIN CAP_AUDIT_CONTROL CAP_CHOWN CAP_KILL CAP_DAC_READ_SEARCH CAP_DAC_OVERRIDE CAP_FOWNER CAP_SYS_TTY_CONFIG
MemoryDenyWriteExecute=yes
RestrictRealtime=yes
RestrictAddressFamilies=AF_UNIX AF_NETLINK AF_INET AF_INET6
SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @obsolete @raw-io
# Increase the default a bit in order to allow many simultaneous
# logins since we keep one fd open per session.
LimitNOFILE=16384