From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f199.google.com (mail-io0-f199.google.com [209.85.223.199]) by kanga.kvack.org (Postfix) with ESMTP id 14EC46B0005 for ; Wed, 20 Jul 2016 12:22:42 -0400 (EDT) Received: by mail-io0-f199.google.com with SMTP id u25so106386462ioi.1 for ; Wed, 20 Jul 2016 09:22:42 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id u65si17892245itd.111.2016.07.20.09.22.25 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 20 Jul 2016 09:22:25 -0700 (PDT) Message-ID: <1469031727.30053.71.camel@redhat.com> Subject: Re: [PATCH v3 00/11] mm: Hardened usercopy From: Rik van Riel Date: Wed, 20 Jul 2016 12:22:07 -0400 In-Reply-To: <063D6719AE5E284EB5DD2968C1650D6D5F4FEA62@AcuExch.aculab.com> References: <1468619065-3222-1-git-send-email-keescook@chromium.org> <063D6719AE5E284EB5DD2968C1650D6D5F4FD6A3@AcuExch.aculab.com> <063D6719AE5E284EB5DD2968C1650D6D5F4FEA62@AcuExch.aculab.com> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-2eVAnQvIdZJKNQESaf+x" Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: David Laight , 'Kees Cook' Cc: "linux-kernel@vger.kernel.org" , Jan Kara , "kernel-hardening@lists.openwall.com" , Will Deacon , "linux-mm@kvack.org" , "sparclinux@vger.kernel.org" , "linux-ia64@vger.kernel.org" , Christoph Lameter , Andrea Arcangeli , "linux-arch@vger.kernel.org" , "x86@kernel.org" , Russell King , "linux-arm-kernel@lists.infradead.org" , Catalin Marinas , PaX Team , Borislav Petkov , Mathias Krause , Fenghua Yu , David Rientjes , Tony Luck , Andy Lutomirski , Josh Poimboeuf , Andrew Morton , Dmitry Vyukov , Laura Abbott , Brad Spengler , Ard Biesheuvel , Pekka Enberg , Daniel Micay , Casey Schaufler , Joonsoo Kim , "linuxppc-dev@lists.ozlabs.org" , "David S. Miller" --=-2eVAnQvIdZJKNQESaf+x Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2016-07-20 at 16:02 +0000, David Laight wrote: > From: Kees Cook > > Sent: 20 July 2016 16:32 > ... > > Yup: that's exactly what it's doing: walking up the stack. :) >=20 > Remind me to make sure all our customers run kernels with it > disabled. You want a single copy_from_user to write to data in multiple stack frames? --=20 All Rights Reversed. --=-2eVAnQvIdZJKNQESaf+x Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAABCAAGBQJXj6UwAAoJEM553pKExN6DcNgH/1kx7TO66ZDBo8zg805rrltm 6J3na8WIOvwfybajpvb1IGnKVz+ZICW2dgKnTbH7tPjs/QZ0hwA912DVq5eEFVSb wOe8fKr4aqifq73uFMkkLXR8U0VY5XDGmjiooLWwQGLxV0ALk/8Rga9emhvECztB s1b9mwxTjE2rViwdws2ovIqW+A14DSUhRp/ctKSJZ72jTISHelfrwe0UAHabsgpr rCTFWFwx0EiORx/kITLjrx24MsCkxJ8utZgER3bEqLoRSJqFFtBr4mVuM1SloSLE EqrQPTkqbkvY7IbTpzkIexkA1XGwiE/iE9t+ZnHwr04Th2NFc2l6W1wbgzcJQY0= =Vh63 -----END PGP SIGNATURE----- --=-2eVAnQvIdZJKNQESaf+x-- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org