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=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 2AF8BC3A59F for ; Sat, 17 Aug 2019 15:36:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0095521922 for ; Sat, 17 Aug 2019 15:36:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="vPoUCB1A" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725945AbfHQPg6 (ORCPT ); Sat, 17 Aug 2019 11:36:58 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:37064 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725784AbfHQPg6 (ORCPT ); Sat, 17 Aug 2019 11:36:58 -0400 Received: by mail-pg1-f195.google.com with SMTP id d1so3856434pgp.4; Sat, 17 Aug 2019 08:36:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=xbJ9K0DCfO2Bo9oHca9mENF0teDYreZja6IAQ39ZFlM=; b=vPoUCB1A6tv68EE3zNLPItEaMWiypqIzlHiZKGuzB0S8AmIfY+9v8okqli+Bsg7TGS fneTDRM2JSby8nj88WmXrE3NxNzNO1df3OLTASa3WM9CqLEHtEHh+iKibzYKNuw0i1fG ZO9bp15bKcL08GWcXNCsGP+HuDtioimc/AcfS5YtOIZIHsiU0OQfNPkYY9sTxzAcxAcW dLuGtPd6fq4RZm1s3HqKXotmb+s1qfmvrFMGtOGszbP4/u9VmEPJjT5ke7Kk8X9/M67v 6x+4o4wtZbIhOYkSJFvTLtEIL8hquiVuM7+9GgBiIl3t5Z+ZjGlR2AsMjxyOU4MJcIrF rHiA== 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:user-agent; bh=xbJ9K0DCfO2Bo9oHca9mENF0teDYreZja6IAQ39ZFlM=; b=C8eGJLZiBX5S4t24Q/RQleqD6nsS0Tw/bptdYM4eFIu2KBLa6Xe4OjOOPZs4t84M6D 6T3CAoR9NCDs0hoSDwvMPpBsMCbBotIbuU2VtqIOl46XXyOmYT6w7/wR7WO81jm9vaOJ E0sKa/+9m+FljGRYZVL0/WuTEwmD3MO/XCTOOpPHLHCVGIX/G/ecl5RNZeJmCUQfldwf J4KTHaQCAjdGa2Zsmn1011PORPJZxqFe6YLySWoweqNmdJITVzhAdnehy5tFW6tsMaO2 BV+63DPHfgTGqeRYQp1BYuaj7F2aOm0uNKOxmDzIoTYvFWcxWml+qPKOhvvjFWct5QWn xFtw== X-Gm-Message-State: APjAAAUXyjN2PwQGnvie+Z/QJkf5iNs+4DEDrXYz8Jbrc7lyJk3YVmoX G9LxliYM0tzHtEel+BTNJZs= X-Google-Smtp-Source: APXvYqyMFfSC6GP2b+6BEb/FE6aTWV75DM1ga1USkzlF8t8RPmRDfN/cmRy2eE4aNIH3MYo8jjjIHA== X-Received: by 2002:aa7:8dd2:: with SMTP id j18mr15990831pfr.88.1566056217255; Sat, 17 Aug 2019 08:36:57 -0700 (PDT) Received: from ast-mbp.dhcp.thefacebook.com ([2620:10d:c090:180::9c96]) by smtp.gmail.com with ESMTPSA id 185sm14829384pff.54.2019.08.17.08.36.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 17 Aug 2019 08:36:56 -0700 (PDT) Date: Sat, 17 Aug 2019 08:36:54 -0700 From: Alexei Starovoitov To: Christian Brauner Cc: Andy Lutomirski , Kees Cook , Andy Lutomirski , Song Liu , Networking , bpf , Alexei Starovoitov , Daniel Borkmann , Kernel Team , Lorenz Bauer , Jann Horn , Greg KH , Linux API , LSM List Subject: Re: [PATCH v2 bpf-next 1/4] bpf: unprivileged BPF access via /dev/bpf Message-ID: <20190817153652.zfcsklt474j72dzm@ast-mbp.dhcp.thefacebook.com> References: <20190806011134.p5baub5l3t5fkmou@ast-mbp> <20190813215823.3sfbakzzjjykyng2@ast-mbp> <201908151203.FE87970@keescook> <20190815234622.t65oxm5mtfzy6fhg@ast-mbp.dhcp.thefacebook.com> <20190816214542.inpt6p655whc2ejw@ast-mbp.dhcp.thefacebook.com> <20190816222252.a7zizw7azkxnv3ot@wittgenstein> <20190817150843.4vsmzpwpcvzndjld@ast-mbp> <61B88085-9FBB-41E6-9783-324E445E428D@ubuntu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <61B88085-9FBB-41E6-9783-324E445E428D@ubuntu.com> User-Agent: NeoMutt/20180223 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: On Sat, Aug 17, 2019 at 05:16:53PM +0200, Christian Brauner wrote: > On August 17, 2019 5:08:45 PM GMT+02:00, Alexei Starovoitov wrote: > >On Sat, Aug 17, 2019 at 12:22:53AM +0200, Christian Brauner wrote: > >> > >> (The one usecase I'd care about is to extend seccomp to do > >pointer-based > >> syscall filtering. Whether or not that'd require (unprivileged) ebpf > >is > >> up for discussion at KSummit.) > > > >Kees have been always against using ebpf in seccomp. I believe he still > >holds this opinion. Until he changes his mind let's stop bringing > >seccomp > >as a use case for unpriv bpf. > > That's why I said "whether or not". > For the record, I do prefer a non-unpriv-ebpf way. > It's still something that will most surely come up in the discussion though. It's very un-kernely way to defer to in-person meetings. If there is anything to discuss please discuss it on the public mailing list.