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=-0.8 required=3.0 tests=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 8C01AC433DF for ; Mon, 8 Jun 2020 18:35:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5EB032063A for ; Mon, 8 Jun 2020 18:35:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="KGfpXEsS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725798AbgFHSfP (ORCPT ); Mon, 8 Jun 2020 14:35:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52074 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725468AbgFHSfP (ORCPT ); Mon, 8 Jun 2020 14:35:15 -0400 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46F11C08C5C2 for ; Mon, 8 Jun 2020 11:35:15 -0700 (PDT) Received: by mail-pg1-x544.google.com with SMTP id 185so9113685pgb.10 for ; Mon, 08 Jun 2020 11:35:15 -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=SKuK+ZsV7MPmpsgKX1I2np3sySPSJbPqU/PgQTtt/OU=; b=KGfpXEsSQeV7Jw57zwT+PfjW56m2tlBM4JvWhjQF68ZgiYc51WNloeGQo86pikEB0A 3k9RQghvZrKUsNWcfepoQ5TQGls3x03ndnuUogkuGmv4ukwTeukR+wqayWcWlmgD0SNr AhW8yWjXyM16ScrAruCIZDYQzVeXz8dlAQmrI= 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=SKuK+ZsV7MPmpsgKX1I2np3sySPSJbPqU/PgQTtt/OU=; b=UWR7A4R7meZk4TQtzPpJMggjfQJ/PDWigmE3j2iBQ/KWyvm9R1m0bSHZvp8Kx4uJuV 0ZbPjTMqEmkCiBfvolLSIWIBWc45BjkDZCpHKjh582mEfVivLt+GEz3UtooMxyZS+hs4 S5dVi1ib6ZZJbgnllOXpx1i0ju/SFzSH33qMhHKazbnBXFECxedrNLYCFjtYKKB5xNcT EYViBnFKDGekWcyEIcTreL3LB766UrHEhH4EDY9e8WxtPA77YTeEMvzSf8a5Jow5Cgwh yYpOra7wT0XRAMSucNJoSpiCX+j45qtOgoWvw5C9jOm0NhNrT6EujKJuDGbQpm+YahNY ljcA== X-Gm-Message-State: AOAM533Z6tMhvr/xFtmrZn6Ikafh0/P7lO+4QrvS4hEi0EOlrmtb8I7F +KtH2egnDAEFxlNR3R2jHpBbcw== X-Google-Smtp-Source: ABdhPJwe7hqwsg7JbWVhGEjmTX4WnIzcJLgFf/ma9Da7qAsuFJ8m7vq5pu4dQSfkoysLJh+40u9WkA== X-Received: by 2002:a05:6a00:84e:: with SMTP id q14mr22457795pfk.309.1591641314677; Mon, 08 Jun 2020 11:35:14 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id h5sm6282911pfb.120.2020.06.08.11.35.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jun 2020 11:35:13 -0700 (PDT) Date: Mon, 8 Jun 2020 11:35:12 -0700 From: Kees Cook To: Alexei Starovoitov Cc: Linus Torvalds , "Eric W. Biederman" , Tetsuo Handa , Andrew Morton , Alexei Starovoitov , David Miller , Al Viro , bpf , linux-fsdevel , Daniel Borkmann , Jakub Kicinski , Masahiro Yamada , Gary Lin , Bruno Meneguele Subject: Re: [RFC][PATCH] net/bpfilter: Remove this broken and apparently unmantained Message-ID: <202006081130.CE3AE614F@keescook> References: <20200329005528.xeKtdz2A0%akpm@linux-foundation.org> <13fb3ab7-9ab1-b25f-52f2-40a6ca5655e1@i-love.sakura.ne.jp> <202006051903.C44988B@keescook> <875zc4c86z.fsf_-_@x220.int.ebiederm.org> <20200606201956.rvfanoqkevjcptfl@ast-mbp> <20200607014935.vhd3scr4qmawq7no@ast-mbp> <20200608162027.iyaqtnhrjtp3vos5@ast-mbp.dhcp.thefacebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200608162027.iyaqtnhrjtp3vos5@ast-mbp.dhcp.thefacebook.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Mon, Jun 08, 2020 at 09:20:27AM -0700, Alexei Starovoitov wrote: > Take android for example. It can certify vmlinux, but not boot fs image. Huh? Yes it does, and for a while now. It uses Android uses dm-verity[1] and fs-verity[2]. [1] https://source.android.com/security/verifiedboot/dm-verity https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/verity.html [2] https://source.android.com/security/apksigning/v3 https://www.kernel.org/doc/html/latest/filesystems/fsverity.html -- Kees Cook