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=-3.9 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,URIBL_BLOCKED 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 4E2CEC433E2 for ; Thu, 10 Sep 2020 23:58:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 114792065E for ; Thu, 10 Sep 2020 23:58:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="gfDQq0ZQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725766AbgIJX6i (ORCPT ); Thu, 10 Sep 2020 19:58:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725283AbgIJX6c (ORCPT ); Thu, 10 Sep 2020 19:58:32 -0400 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1DD3CC061757 for ; Thu, 10 Sep 2020 16:58:32 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id l191so5256692pgd.5 for ; Thu, 10 Sep 2020 16:58:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=TiD2LqrFMgU68bxi0s2xnUciJbQ2K0M9nK4+d+t39K8=; b=gfDQq0ZQqLUJ2DXD4GeetN5kOqP51hwBhKIkS41DxfjESdBN19BG5x+kfviKP/yh9X NBzaEVawSvptQ7Q4030RuEKgEvrEhYDi7bTC89bB7xG03X9rvK14W6PkRUtnT9UOr0Zn w2FsE0kcZLviYstxkTuTgVRezP064DYBbisLc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=TiD2LqrFMgU68bxi0s2xnUciJbQ2K0M9nK4+d+t39K8=; b=hdbgDoVxtbEYjlMFYP6+0WO0g/qRyggWA+ze01WMMMWJqjnT3+nt9WgTN8kQVBcpkW 641YojuYQULGST1SvDSubnvJCDDvPDSTX2fcWLi7ZcfwckBoxz9ruAp40i+/AWVLSRMo xpUruvQO/KW0NDnwWKkypfj3//EcF8DVy6+6S7aU7oOH4vn7KebvH6AzakKGNYpAALPR PILQOsXUYFhAdz3P1k5gvA6yIy7HME37zOKqbowv1HU9GLspOeim3Zh8yxioYfhDBe07 PCXsOABztEOBcv63JSeK4LSZoYi9orsY57aiU0MWHe0UgrcX2o+DWbNknUiwpj3t/Rwu vaYA== X-Gm-Message-State: AOAM5301yeF7EfrmH2KvkUX+NPB9VsshmmHrqIdsHFikfn4e/3isIIzA 5RKGhY6fxmhArWBdBUiaBU0UlQ== X-Google-Smtp-Source: ABdhPJx7/8vv2eB24dRiaLxWkU+dxFBXMvFoW+hNl5OQ5bHZLnmTBQqdIzH3CPNupiTU/enKTlQaQg== X-Received: by 2002:a17:902:b216:: with SMTP id t22mr8241168plr.35.1599782311659; Thu, 10 Sep 2020 16:58:31 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id v91sm159824pjv.12.2020.09.10.16.58.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2020 16:58:30 -0700 (PDT) Date: Thu, 10 Sep 2020 16:58:29 -0700 From: Kees Cook To: kernel-hardening@lists.openwall.com Cc: John Wood , Matthew Wilcox , Jonathan Corbet , Alexander Viro , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Luis Chamberlain , Iurii Zaikin , James Morris , "Serge E. Hallyn" , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-security-module@vger.kernel.org Subject: Re: [RESEND][RFC PATCH 0/6] Fork brute force attack mitigation (fbfam) Message-ID: <202009101656.FB68C6A@keescook> References: <20200910202107.3799376-1-keescook@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200910202107.3799376-1-keescook@chromium.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 10, 2020 at 01:21:01PM -0700, Kees Cook wrote: > From: John Wood > > The goal of this patch serie is to detect and mitigate a fork brute force > attack. Thanks for this RFC! I'm excited to get this problem finally handled in the kernel. Hopefully the feedback is useful. :) -- Kees Cook