{ config, lib, ... }: with lib; { meta = { maintainers = [ maintainers.joachifm ]; }; options = { security.lockKernelModules = mkOption { type = types.bool; default = false; description = '' Disable kernel module loading once the system is fully initialised. Module loading is disabled until the next reboot. Problems caused by delayed module loading can be fixed by adding the module(s) in question to . ''; }; }; config = mkIf config.security.lockKernelModules { boot.kernelModules = concatMap (x: if x.device != null then if x.fsType == "vfat" then [ "vfat" "nls-cp437" "nls-iso8859-1" ] else [ x.fsType ] else []) config.system.build.fileSystems; systemd.services.disable-kernel-module-loading = rec { description = "Disable kernel module loading"; wantedBy = [ config.systemd.defaultUnit ]; after = [ "systemd-udev-settle.service" "firewall.service" "systemd-modules-load.service" ] ++ wantedBy; unitConfig.ConditionPathIsReadWrite = "/proc/sys/kernel"; serviceConfig = { Type = "oneshot"; RemainAfterExit = true; ExecStart = "/bin/sh -c 'echo -n 1 >/proc/sys/kernel/modules_disabled'"; }; }; }; }