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=-11.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham 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 B4294C48BD6 for ; Thu, 27 Jun 2019 13:17:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 69A4C208CB for ; Thu, 27 Jun 2019 13:17:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="OC1UYhpB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 69A4C208CB Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id F379B8E000C; Thu, 27 Jun 2019 09:17:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EE7F68E0002; Thu, 27 Jun 2019 09:17:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DD6DB8E000C; Thu, 27 Jun 2019 09:17:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-vs1-f69.google.com (mail-vs1-f69.google.com [209.85.217.69]) by kanga.kvack.org (Postfix) with ESMTP id BB2588E0002 for ; Thu, 27 Jun 2019 09:17:13 -0400 (EDT) Received: by mail-vs1-f69.google.com with SMTP id i6so695033vsp.15 for ; Thu, 27 Jun 2019 06:17:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:mime-version:references :in-reply-to:from:date:message-id:subject:to:cc :content-transfer-encoding; bh=vy9qWbldNZVn/tHHwiK7Of/LXRmbGzfYDFquQFBj1LU=; b=K9g54XSSY2pFlR4+yzsO9HRlBBvXxHF9FIZpa3HR1496YWY/zAc9gTbJ6oXK4rPMgU j94283A3ufDlzEkZ+vbxKbek0KQbT7UBeTW0aagB7VenyrmVDBmeWs0MkIepUPJ6zDbk HgAJZqoT3t52b0E+S4frKhIEjTSvqZM2JHMbVutdDe9yBtsrGGGnhpXZc8I2cUTfGKDU OOqLH08uxBrPJRakWRROEpDGiOmL/DZyvBfzFrwU5QIwpd8IT/wDwCSbuwEbzu93Ynyl SM/aOqSDMZ+14+xIOI/Lwkl5Hc37WwBGQyQk3z4Ad3n3CAs36Uw11KYQGgmeoXLZgbkf ICew== X-Gm-Message-State: APjAAAWEa8Aj5a0x/OpiRtTW7HKV4tkNbJ1R/+uSSdOJhvpHOwMEuygN 635TDaCWKLTptKwhaG0W8qZdzS3sWSqIDZwFvrF2gv99hcCogcGVhVpy0WEqek5+a2v6XHbypK3 KAB4THWP0Ow6AOG2ED+Y29Fh7oYt2WnXPuPg7TstJ3Y6JFeUInwg1jdDg8mPWHo4F3Q== X-Received: by 2002:a1f:bf07:: with SMTP id p7mr1385040vkf.8.1561641433383; Thu, 27 Jun 2019 06:17:13 -0700 (PDT) X-Received: by 2002:a1f:bf07:: with SMTP id p7mr1385011vkf.8.1561641432802; Thu, 27 Jun 2019 06:17:12 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1561641432; cv=none; d=google.com; s=arc-20160816; b=M4+nqqLNaMKJZCwjG1YwH9HyPizgGgfE0qLIZ4kHSTYMPXaNWXPDQzN0qdZw0Mwcw/ JBZ+x4BYEoiOkI/XFmXoNmlrLP2XlyYEE3+nYDeIdzVZcTheMRgFwetD1wroA5PjWln3 5ajRLFqYaHMVfkjEUX/DbdFOw0MtAfsWs/Ao6xmLPGTMyy1mdu18lany+pl0IQZDGJIw qJtEKfevqn/AV06xUb2ATfCsvRYLOKTQf/kzM6u5tbmaWtErHfy0htYArYVCYQ+DdklR E4E48SgNOGcNXOCPoi7DAZG3oict1lGR1ZFrO23T1HEbdVjBlb/LqHVNqTcqnKUVnzDt nKog== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:dkim-signature; bh=vy9qWbldNZVn/tHHwiK7Of/LXRmbGzfYDFquQFBj1LU=; b=toNetFmjbGn8dEvKlPfSrfc//sYGhbbQ2QXwurGQIZyN12K7yRVX9rjp/hqq/O+446 LyC0MJzAFa5N4twDTV1ByMu1CQAZmktbIsj/fOXRsAFYJM1EFu8539w3KoZcNiscOxFL 4VMW9Ce8JAJLW2ZHJUauNvcOPjnbf6JPHGiJ35qkXwbtOdvA2D+dAnVFthVQsEtHbN+H jLWgIXlZFpTB623n2iyJZr90puga7kPS+hx5FIGbTXfXbJWWiC9k6yVbBV5OIWc+Owr/ 9Mcs3ji57yZ0nGe5ubntGLh/jcQ6oZWoEwEmUOL0qr7AscvXCh8mIYba8MAkVfGAo3+b NdcA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=OC1UYhpB; spf=pass (google.com: domain of glider@google.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=glider@google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id n10sor1062361uap.66.2019.06.27.06.17.12 for (Google Transport Security); Thu, 27 Jun 2019 06:17:12 -0700 (PDT) Received-SPF: pass (google.com: domain of glider@google.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=OC1UYhpB; spf=pass (google.com: domain of glider@google.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=glider@google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=vy9qWbldNZVn/tHHwiK7Of/LXRmbGzfYDFquQFBj1LU=; b=OC1UYhpBFS959lMOYt/IcpryLBaWsNxeZVjDmulenf6LUHVyIdy908unuOq9TESJxu /jkJrUavVPEjsBXhsHduYzVOFoca0ZCd4/4qS+y7GeZOz2qnbNZ6yE2ezvymUQUwMXnR 1VBmCcxbiwfi2K6u4ZxvPrSSuN3Y9Ij2zo7Bae2jaObMlfvrnv5Ov4dPgNdHTK+qdcws Xt7uk5cQg4hAD3lWE8r3HMBcfVDD3YNIQ0V1yLsVqZXyx0KXXdvzjV0oKSwobxrX9bD6 jVZoIO6OtjAntp/8ckwjiNzV+G7Xru+qFaE5KcbKor98V1qhpmDHM3UagK4fo3NvTHvd Qs7g== X-Google-Smtp-Source: APXvYqztRBRUmdw5LT1ObTf3jCkBOxfHFV2ozeQLBqAbyAIQTUUdoZukbB+6Skv3+6Fb/xNGQlqQRi+6N5axxh0px5w= X-Received: by 2002:ab0:308c:: with SMTP id h12mr2232235ual.72.1561641432229; Thu, 27 Jun 2019 06:17:12 -0700 (PDT) MIME-Version: 1.0 References: <20190626121943.131390-1-glider@google.com> <20190626121943.131390-2-glider@google.com> <20190626162835.0947684d36ef01639f969232@linux-foundation.org> In-Reply-To: <20190626162835.0947684d36ef01639f969232@linux-foundation.org> From: Alexander Potapenko Date: Thu, 27 Jun 2019 15:17:00 +0200 Message-ID: Subject: Re: [PATCH v8 1/2] mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options To: Andrew Morton Cc: Christoph Lameter , Kees Cook , Masahiro Yamada , Michal Hocko , James Morris , "Serge E. Hallyn" , Nick Desaulniers , Kostya Serebryany , Dmitry Vyukov , Sandeep Patil , Laura Abbott , Randy Dunlap , Jann Horn , Mark Rutland , Marco Elver , Qian Cai , Linux Memory Management List , linux-security-module , Kernel Hardening Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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, Jun 27, 2019 at 1:28 AM Andrew Morton w= rote: > > On Wed, 26 Jun 2019 14:19:42 +0200 Alexander Potapenko wrote: > > > v8: > > - addressed comments by Michal Hocko: revert kernel/kexec_core.c and > > apply initialization in dma_pool_free() > > - disable init_on_alloc/init_on_free if slab poisoning or page > > poisoning are enabled, as requested by Qian Cai > > - skip the redzone when initializing a freed heap object, as requeste= d > > by Qian Cai and Kees Cook > > - use s->offset to address the freeptr (suggested by Kees Cook) > > - updated the patch description, added Signed-off-by: tag > > v8 failed to incorporate > > https://ozlabs.org/~akpm/mmots/broken-out/mm-security-introduce-init_on_a= lloc=3D1-and-init_on_free=3D1-boot-options-fix.patch > and > https://ozlabs.org/~akpm/mmots/broken-out/mm-security-introduce-init_on_a= lloc=3D1-and-init_on_free=3D1-boot-options-fix-2.patch > > it's conventional to incorporate such fixes when preparing a new > version of a patch. > v9 contains these patches (I've also exported init_on_free), so should now be fine to drop them. --=20 Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Stra=C3=9Fe, 33 80636 M=C3=BCnchen Gesch=C3=A4ftsf=C3=BChrer: Paul Manicle, Halimah DeLaine Prado Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg