nixos/rspamd: add systemd service sandbox

Drop preStart script in favour of systemd StateDirectory parameter.

1 files changed, 33 insertions, 6 deletions

diff --git a/nixos/modules/services/mail/rspamd.nix b/nixos/modules/services/mail/rspamd.nix
index aacdbe2aeed2..2707bd16cdbf 100644
--- a/nixos/modules/services/mail/rspamd.nix
+++ b/nixos/modules/services/mail/rspamd.nix
@@ -394,16 +394,43 @@ in
       restartTriggers = [ rspamdDir ];
 
       serviceConfig = {
-        ExecStart = "${pkgs.rspamd}/bin/rspamd ${optionalString cfg.debug "-d"} --user=${cfg.user} --group=${cfg.group} --pid=/run/rspamd.pid -c /etc/rspamd/rspamd.conf -f";
+        ExecStart = "${pkgs.rspamd}/bin/rspamd ${optionalString cfg.debug "-d"} -c /etc/rspamd/rspamd.conf -f";
         Restart = "always";
+
+        User = "${cfg.user}";
+        Group = "${cfg.group}";
+
         RuntimeDirectory = "rspamd";
+        RuntimeDirectoryMode = "0755";
+        StateDirectory = "rspamd";
+        StateDirectoryMode = "0700";
+
+        AmbientCapabilities = "";
+        CapabilityBoundingSet = "";
+        DevicePolicy = "closed";
+        LockPersonality = true;
+        NoNewPrivileges = true;
+        PrivateDevices = true;
+        PrivateMounts = true;
         PrivateTmp = true;
+        PrivateUsers = true;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectSystem = "strict";
+        RemoveIPC = true;
+        RestrictAddressFamilies = "AF_INET AF_INET6 AF_UNIX";
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+        SystemCallArchitectures = "native";
+        SystemCallFilter = "@system-service";
+        UMask = "0077";
       };
-
-      preStart = ''
-        ${pkgs.coreutils}/bin/mkdir -p /var/lib/rspamd
-        ${pkgs.coreutils}/bin/chown ${cfg.user}:${cfg.group} /var/lib/rspamd
-      '';
     };
   };
   imports = [