Revert "Revert "units: lock down logind with fs namespacing options""

This reverts commit 28f38a76345b7548700d2337dd8b9a8c3f5b0643.

The revert was done because Ubuntu CI was completely broken with it. Let's see
if it fares better now.

diff --git a/units/systemd-logind.service.in b/units/systemd-logind.service.in
index a864f66..9c8938e 100644 (file)
--- a/units/systemd-logind.service.in
+++ b/units/systemd-logind.service.in
@@ -21,19 +21,27 @@ After=dbus.socket
 
 [Service]
 BusName=org.freedesktop.login1
-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 CAP_LINUX_IMMUTABLE
+CapabilityBoundingSet=CAP_SYS_ADMIN CAP_MAC_ADMIN CAP_AUDIT_CONTROL CAP_CHOWN CAP_DAC_READ_SEARCH CAP_DAC_OVERRIDE CAP_FOWNER CAP_SYS_TTY_CONFIG CAP_LINUX_IMMUTABLE
 ExecStart=@rootlibexecdir@/systemd-logind
 FileDescriptorStoreMax=512
 IPAddressDeny=any
 LockPersonality=yes
 MemoryDenyWriteExecute=yes
 NoNewPrivileges=yes
+PrivateTmp=yes
+ProtectControlGroups=yes
+ProtectHome=yes
 ProtectHostname=yes
+ProtectKernelModules=yes
+ProtectSystem=strict
+ReadWritePaths=/etc /run
 Restart=always
 RestartSec=0
 RestrictAddressFamilies=AF_UNIX AF_NETLINK
 RestrictNamespaces=yes
 RestrictRealtime=yes
+RuntimeDirectory=systemd/sessions systemd/seats systemd/users systemd/inhibit systemd/shutdown
+RuntimeDirectoryPreserve=yes
 SystemCallArchitectures=native
 SystemCallErrorNumber=EPERM
 SystemCallFilter=@system-service