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=-10.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 69306C433E2 for ; Wed, 15 Jul 2020 06:06:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 488592065D for ; Wed, 15 Jul 2020 06:06:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728185AbgGOGGY (ORCPT ); Wed, 15 Jul 2020 02:06:24 -0400 Received: from verein.lst.de ([213.95.11.211]:57614 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727899AbgGOGGY (ORCPT ); Wed, 15 Jul 2020 02:06:24 -0400 Received: by verein.lst.de (Postfix, from userid 2407) id 518DE67357; Wed, 15 Jul 2020 08:06:20 +0200 (CEST) Date: Wed, 15 Jul 2020 08:06:20 +0200 From: Christoph Hellwig To: "Eric W. Biederman" Cc: Christoph Hellwig , Nick Hu , Greentime Hu , Vincent Chen , Paul Walmsley , Palmer Dabbelt , Andrew Morton , Linus Torvalds , linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 6/6] exec: use force_uaccess_begin during exec and exit Message-ID: <20200715060620.GA21385@lst.de> References: <20200714105505.935079-1-hch@lst.de> <20200714105505.935079-7-hch@lst.de> <87v9ip4fm6.fsf@x220.int.ebiederm.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87v9ip4fm6.fsf@x220.int.ebiederm.org> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 14, 2020 at 10:33:05PM -0500, Eric W. Biederman wrote: > Christoph Hellwig writes: > > > Both exec and exit want to ensure that the uaccess routines actually do > > access user pointers. Use the newly added force_uaccess_begin helper > > instead of an open coded set_fs for that to prepare for kernel builds > > where set_fs() does not exist. > > Acked-by: "Eric W. Biederman" > > Have you played with a tree with all of your patches > and placing force_uaccess_begin in init/main.c:start_kernel? No, I have converted the early boot code to not require KERNEL_DS and except for a pending network item remove set_fs entirely. Older series here, will need some rework: http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/set_fs-removal