Received: by 2002:a25:86ce:0:0:0:0:0 with SMTP id y14csp1902714ybm; Thu, 23 May 2019 08:23:09 -0700 (PDT) X-Google-Smtp-Source: APXvYqw6c6i39Huj2LCnDtZI//IJ3ouxtgWC4BTfUzPNysy6M/7qlsVt4MYYfVfyxqsONofckuc1 X-Received: by 2002:aa7:8acb:: with SMTP id b11mr104284562pfd.115.1558624989737; Thu, 23 May 2019 08:23:09 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1558624989; cv=none; d=google.com; s=arc-20160816; b=h8z5vh9szl5d53MBDTiXKZEZmVIQlnfANNyFoJzRzjNdA5WTVm92NIZ9elkSw2rpxe LLIiFgXOQJ/kW7VwpPm6i4fgf6ow4qlJRutQUrl4SBy7tkPkd2B/UFZ/WqcbtQJQEHXw AJbpHZYhCaWa1vSQSWcaFeacDRxCZwnUZi/zuS+iKK7RMDYFJWwP48Cxbn8QPhKiL+QK o0lbSfRnKQkJ5ccWVghId2ZZija/glPY71bWaaqjE/HrfIE326jDma+2pVUmekbbn6xq kRA77utGHw2jfPmJUT1Ds3H7yAV0PwByZQ+sSCqvAGn34qfBhIdd4B8iBL6brpdTlH13 3ltg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=fb+sRFUqop/LR09JWznlfcD+auxrcxFlhwW+VrYfGE8=; b=z5+BxI+JPEphONxBqn/v6N6gTd5I3wIqGSk+5FpO9g8GTQcCZXAbuHw4mzaF1HL8N7 TjZcpSrNYvzUXmmpiVd3+XN4OPRNJWvizaH0CnN3kYxSqwiLie9YdroaQ3I9gM85YmMF rvqU6Wd8eVxf/VWZMw5lF0WtqtanwDHbfn/sGVMFfzSMw70AG6bUEK/8PHycM+JDssOI uCtHkjpYLwN6Lq6o4nPyfrx5sqf6OvghO4m748bgLgSKgMc2i4lYO2Z49WR6uaKSqKkl VQ21nyKtBMqeRxMvbA3/9SSLTyF6NCz3G5GF8X2v4cy0yCjMof/sElFBWTrMGA4vPvGn FdjQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l73si33510727pfb.126.2019.05.23.08.22.53; Thu, 23 May 2019 08:23:09 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731045AbfEWPVe (ORCPT + 99 others); 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