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=-6.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 DEE56C43457 for ; Fri, 9 Oct 2020 19:54:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA92D225A9 for ; Fri, 9 Oct 2020 19:54:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="WmBTqbBH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389286AbgJITya (ORCPT ); Fri, 9 Oct 2020 15:54:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391311AbgJITyS (ORCPT ); Fri, 9 Oct 2020 15:54:18 -0400 Received: from mail-pl1-x642.google.com (mail-pl1-x642.google.com [IPv6:2607:f8b0:4864:20::642]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6A9FC0613D5 for ; Fri, 9 Oct 2020 12:54:17 -0700 (PDT) Received: by mail-pl1-x642.google.com with SMTP id bb1so4957594plb.2 for ; Fri, 09 Oct 2020 12:54:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=t2TuK5ejrS4eO7yBYGxlh4AfvTTT9eubX9M0NFaNHUw=; b=WmBTqbBHc/fLbnYNSF9b2ZcYqm01OyvGBVCdOMlOlplf+K84OlLZT78WwFWOagQuLL tDy2L8MOtypox20wQcgMiCc7YNVSLgaLbl/v5wT3DFsEBCQ5+QAukKZ+evprA3Lh/MCc glirkHKlR1Dy+Nksiwkc5zH0AJjLGUHWF+KuQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=t2TuK5ejrS4eO7yBYGxlh4AfvTTT9eubX9M0NFaNHUw=; b=BiR43AV/goRGwg03DjdH36yxrbwPrLiYSwAf9bOPubNbvcK+VET9HdB0z+WsDyEyk9 EqThYgyBI9yAxVax4u9FtdmGu7I2QisxUHkQH3kRS89UK1Mj5mljqJ7ijK4/JnusGxSi 9FzfJlZpixQ9h0cAkdIp7+67uUHkHsFAwPMUopl5J3e9TmKOuDJ0VpcEQfnf+Y5BtzY9 P0k8AtaCNQclzeKhPdtllYc1pDJTtquwMFyPDMtDP0WO2+8Yt6hKb30pBEV4Q3xmcoeX /g7gEFB6vMdaWobKzCizqrFEAJa91+tVqFueYg+jkv30FDm07HmKXGLZsFoI3wJk2ihR zKsQ== X-Gm-Message-State: AOAM530mz5/n6H78s+aozZQWVx6LttL/ESQiIQ+2N+IN5H9jQ4pq2Qjf 9uDnD2VzsHr8H+IWyY9kYCwVrQ== X-Google-Smtp-Source: ABdhPJylPL8PSKzfsb/31DQv1ffR9H5CiGwEbjOyZ1DOxnKQzkhmw2oI6Kjc3x/3NEhDPJExrT73pQ== X-Received: by 2002:a17:902:6545:b029:d3:d1fc:ff28 with SMTP id d5-20020a1709026545b02900d3d1fcff28mr13609528pln.34.1602273257514; Fri, 09 Oct 2020 12:54:17 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id b185sm11752903pgc.68.2020.10.09.12.54.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Oct 2020 12:54:16 -0700 (PDT) From: Kees Cook To: Andrew Morton Cc: Kees Cook , Marco Elver , Jonathan Corbet , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Vlastimil Babka , Roman Gushchin , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 0/3] Actually fix freelist pointer vs redzoning Date: Fri, 9 Oct 2020 12:54:08 -0700 Message-Id: <20201009195411.4018141-1-keescook@chromium.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org v2: - add additional clean-up patches - add Tested-by v1: https://lore.kernel.org/lkml/20201008233443.3335464-1-keescook@chromium.org This fixes redzoning vs the freelist pointer (both for middle-position and very small caches). Both are "theoretical" fixes, in that I see no evidence of such small-sized caches actually be used in the kernel, but that's no reason to let the bugs continue to exist. :) Thanks! -Kees Kees Cook (3): mm/slub: Clarify verification reporting mm/slub: Fix redzoning for small allocations mm/slub: Actually fix freelist pointer vs redzoning Documentation/vm/slub.rst | 10 +++++----- mm/slub.c | 36 +++++++++++++++--------------------- 2 files changed, 20 insertions(+), 26 deletions(-) -- 2.25.1