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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id o130sm157376311pfg.171.2019.08.08.16.09.05 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 08 Aug 2019 16:09:05 -0700 (PDT) Date: Thu, 8 Aug 2019 16:09:04 -0700 From: Kees Cook To: Andrew Morton Cc: Andrey Konovalov , Will Deacon , Will Deacon , Vincenzo Frascino , Catalin Marinas , Mark Rutland , kvm@vger.kernel.org, Szabolcs Nagy , dri-devel@lists.freedesktop.org, Kostya Serebryany , Khalid Aziz , "open list:KERNEL SELFTEST FRAMEWORK" , Felix Kuehling , Jacob Bramley , Leon Romanovsky , linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, Christoph Hellwig , Jason Gunthorpe , Linux ARM , Dave Martin , Evgeniy Stepanov , linux-media@vger.kernel.org, Kevin Brodsky , Ruben Ayrapetyan , Ramana Radhakrishnan , Alex Williamson , Mauro Carvalho Chehab , Dmitry Vyukov , Linux Memory Management List , Greg Kroah-Hartman , Yishai Hadas , LKML , Jens Wiklander , Lee Smith , Alexander Deucher , enh , Robin Murphy , Christian Koenig , Luc Van Oostenryck Subject: Re: [PATCH v19 00/15] arm64: untag user pointers passed to the kernel Message-ID: <201908081608.A4F6711@keescook> References: <20190724140212.qzvbcx5j2gi5lcoj@willie-the-truck> <20190724142059.GC21234@fuggles.cambridge.arm.com> <20190806171335.4dzjex5asoertaob@willie-the-truck> <201908081410.C16D2BD@keescook> <20190808153300.09d3eb80772515f0ea062833@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190808153300.09d3eb80772515f0ea062833@linux-foundation.org> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Aug 08, 2019 at 03:33:00PM -0700, Andrew Morton wrote: > On Thu, 8 Aug 2019 14:12:19 -0700 Kees Cook wrote: > > > > The ones that are left are the mm ones: 4, 5, 6, 7 and 8. > > > > > > Andrew, could you take a look and give your Acked-by or pick them up directly? > > > > Given the subsystem Acks, it seems like 3-10 and 12 could all just go > > via Andrew? I hope he agrees. :) > > I'll grab everything that has not yet appeared in linux-next. If more > of these patches appear in linux-next I'll drop those as well. > > The review discussion against " [PATCH v19 02/15] arm64: Introduce > prctl() options to control the tagged user addresses ABI" has petered > out inconclusively. prctl() vs arch_prctl(). I've always disliked arch_prctl() existing at all. Given that tagging is likely to be a multi-architectural feature, it seems like the controls should live in prctl() to me. -- Kees Cook