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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_NEOMUTT 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 DD803C282DD for ; Thu, 23 May 2019 15:21:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BC88F20665 for ; Thu, 23 May 2019 15:21:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731054AbfEWPVe (ORCPT ); Thu, 23 May 2019 11:21:34 -0400 Received: from foss.arm.com ([217.140.101.70]:48894 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730947AbfEWPVc (ORCPT ); Thu, 23 May 2019 11:21:32 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5555380D; Thu, 23 May 2019 08:21:32 -0700 (PDT) Received: from mbp (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3D6CE3F690; Thu, 23 May 2019 08:21:26 -0700 (PDT) Date: Thu, 23 May 2019 16:21:19 +0100 From: Catalin Marinas To: enh Cc: Kees Cook , Evgenii Stepanov , Andrey Konovalov , Khalid Aziz , Linux ARM , Linux Memory Management List , LKML , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, "open list:KERNEL SELFTEST FRAMEWORK" , Vincenzo Frascino , Will Deacon , Mark Rutland , Andrew Morton , Greg Kroah-Hartman , Yishai Hadas , Felix Kuehling , Alexander Deucher , Christian Koenig , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Dmitry Vyukov , Kostya Serebryany , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy Subject: Re: [PATCH v15 00/17] arm64: untag user pointers passed to the kernel Message-ID: <20190523152118.t22z37mpqfwjjtkw@mbp> References: <20190517144931.GA56186@arrakis.emea.arm.com> <20190521182932.sm4vxweuwo5ermyd@mbp> <201905211633.6C0BF0C2@keescook> <20190522101110.m2stmpaj7seezveq@mbp> <20190522163527.rnnc6t4tll7tk5zw@mbp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 22, 2019 at 09:58:22AM -0700, enh wrote: > i was questioning the argument about the ioctl issues, and saying that > from my perspective, untagging bugs are not really any different than > any other kind of kernel bug. Once this series gets in, they are indeed just kernel bugs. What I want is an easier way to identify them, ideally before they trigger in the field. > i still don't see how this isn't just a regular testing/CI issue, the > same as any other kind of kernel bug. it's already the case that i can > get a bad kernel... The testing would have a smaller code coverage in terms of drivers, filesystems than something like a static checker (though one does not exclude the other). -- Catalin