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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,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 E8DAAC43603 for ; Thu, 12 Dec 2019 13:59:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C636A21655 for ; Thu, 12 Dec 2019 13:59:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729595AbfLLN7P (ORCPT ); Thu, 12 Dec 2019 08:59:15 -0500 Received: from isilmar-4.linta.de ([136.243.71.142]:42634 "EHLO isilmar-4.linta.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729558AbfLLN7M (ORCPT ); Thu, 12 Dec 2019 08:59:12 -0500 X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES X-isilmar-external: YES Received: from light.dominikbrodowski.net (brodo.linta [10.1.0.102]) by isilmar-4.linta.de (Postfix) with ESMTPSA id 4003C200A95; Thu, 12 Dec 2019 13:59:11 +0000 (UTC) Received: by light.dominikbrodowski.net (Postfix, from userid 1000) id C717120AFE; Thu, 12 Dec 2019 14:57:31 +0100 (CET) From: Dominik Brodowski To: Alexander Viro , Linus Torvalds Cc: Greg Kroah-Hartman , "Rafael J . Wysocki" , Andrew Morton , Ingo Molnar , linux-kernel@vger.kernel.org Subject: [PATCH 0/3] use do_mount() instead of ksys_mount() Date: Thu, 12 Dec 2019 14:57:21 +0100 Message-Id: <20191212135724.331342-1-linux@dominikbrodowski.net> X-Mailer: git-send-email 2.24.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This small series replaces all in-kernel calls to the userspace-focused wrapper ksys_mount() with calls to the kernel-centric do_mount(). For each replacement, one needs to verify that the first and third parameter (char *dev_name, char *type) are strings allocated in kernelspace and that the fifth parameter (void *data) is either NULL or refers to a full page (only occurence in init/do_mounts.c::do_mount_root()). The second and fourth parameters (char *dir_name, unsigned long flags) are passed by ksys_mount() to do_mount() unchanged, and therefore do not require particular care. --- @viro: is this something for you to take and push upstream for the next cycle? The same changes (on top of commit ae4b064e2a616b545acf02b8f50cc513b32c7522: Merge tag 'afs-fixes-20191211' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs (2019-12-11 18:10:40 -0800) are also available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux.git remove-ksys-mount including all changes up to cccaa5e33525fc07f4a2ce0518e50b9ddf435e47: init: use do_mount() instead of ksys_mount() (2019-12-12 14:50:05 +0100) ---------------------------------------------------------------- Dominik Brodowski (3): devtmpfs: use do_mount() instead of ksys_mount() initrd: use do_mount() instead of ksys_mount() init: use do_mount() instead of ksys_mount() drivers/base/devtmpfs.c | 6 +++--- fs/namespace.c | 10 ++-------- include/linux/device.h | 4 ++-- include/linux/syscalls.h | 2 -- init/do_mounts.c | 30 +++++++++++++++++++++++------- init/do_mounts_initrd.c | 6 +++--- 6 files changed, 33 insertions(+), 25 deletions(-) Thanks, Dominik -- 2.24.1