From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89E03C43441 for ; Mon, 12 Nov 2018 20:48:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E0F722419 for ; Mon, 12 Nov 2018 20:48:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2E0F722419 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=fatal.se Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=util-linux-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729470AbeKMGnm (ORCPT ); Tue, 13 Nov 2018 01:43:42 -0500 Received: from 82-209-166-85.cust.bredband2.com ([82.209.166.85]:56042 "EHLO pi.fatal.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725925AbeKMGnm (ORCPT ); Tue, 13 Nov 2018 01:43:42 -0500 Received: by pi.fatal.se (Postfix, from userid 1000) id 82302246BC; Mon, 12 Nov 2018 21:48:45 +0100 (CET) From: Andreas Henriksson To: util-linux@vger.kernel.org Cc: Andreas Henriksson Subject: [RFC/PATCH] Add hardening settings to fstrim.service Date: Mon, 12 Nov 2018 21:48:43 +0100 Message-Id: <20181112204843.21641-1-andreas@fatal.se> X-Mailer: git-send-email 2.11.0 Sender: util-linux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: util-linux@vger.kernel.org This limits what the fstrim process has access to when it runs. PrivateUsers can't be enabled because of: "If this mode is enabled, all unit processes are run without privileges in the host user namespace[...]" Further improving this with additional option or making things even tighter is most likely possible. Signed-off-by: Andreas Henriksson --- sys-utils/fstrim.service.in | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/sys-utils/fstrim.service.in b/sys-utils/fstrim.service.in index 2d5daf99d..0bab91a9c 100644 --- a/sys-utils/fstrim.service.in +++ b/sys-utils/fstrim.service.in @@ -5,3 +5,13 @@ Documentation=man:fstrim(8) [Service] Type=oneshot ExecStart=@sbindir@/fstrim -Av +ProtectSystem=strict +ProtectHome=yes +PrivateDevices=no +PrivateNetwork=yes +PrivateUsers=no +ProtectKernelTunables=yes +ProtectKernelModules=yes +ProtectControlGroups=yes +MemoryDenyWriteExecute=yes +SystemCallFilter=@default @file-system @basic-io @system-service -- 2.19.1