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=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 57284C433E0 for ; Mon, 18 May 2020 22:55:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 27EFC207F9 for ; Mon, 18 May 2020 22:55:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=amacapital-net.20150623.gappssmtp.com header.i=@amacapital-net.20150623.gappssmtp.com header.b="xEFLjRTP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728078AbgERWzU (ORCPT ); Mon, 18 May 2020 18:55:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726500AbgERWzT (ORCPT ); Mon, 18 May 2020 18:55:19 -0400 Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 78D6DC05BD09 for ; Mon, 18 May 2020 15:55:19 -0700 (PDT) Received: by mail-wm1-x344.google.com with SMTP id f13so1088530wmc.5 for ; Mon, 18 May 2020 15:55:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amacapital-net.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=CbrRoXG+bW2TyulWncy8iTxwjC+YKFA1v7y3l78jKH4=; b=xEFLjRTPUSjctOEm0r+4bFklqfQG0ZHiIOdLVfbUyvWMinyZ18EIpM9hBV7EPB6+7I 3kJESCqxx/37NLhYW11GJbI6vngFWnzVe3/2mN8le+21aarLphA0UDZaTi9oGPklLrWa OZSMFSRyJenzxnzVAzcmHYJKfoaymHRUSU08bEVofRCapx8hLvsKqS0PWr0kGKPZT9fj Fjy08XYYXs2pzSWZ/9AzoZH0Cbz9PGHKTRvJCAguHNOvZZ8sA/ZMaG2oWw2fBwpSwwor AVzHYh2B16/j1enIZpn8Fa8fXJyB7XLzx5z83PdM2EeIf/yTMOn2LV/IU4aBm20c0xTd pYGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=CbrRoXG+bW2TyulWncy8iTxwjC+YKFA1v7y3l78jKH4=; b=nnM1HEC/lwLRjHqBFrtxYK0r0f8pmqpTY6yfYakTICDym/OFBoiEXjAsIm7NRAiBZZ Z8SK02bXe0eaqbf4U17Y1K4XKRgQPilux5y1ujeG+6+8lPS8gE+YX8FlpdiCaj44w/rV 3RJlvsmAxnTprdYYG0CLFDZII3BQ9PTmq3CoHOKUpojm/C2LLwJi/CYDuSpjKyloPMMD cq1WSOQoUc576NNMbSxl7LE1+Gh8QG78DONyz8KZdZXPHLGxpop9g6+88x4Xxed4mubg lJ0sA64SZopRbVlje38JqQvo3fDc46AxaLbHXqZ8X+hpPeg2+akhKur3eQpzbSYi+oa9 yUfA== X-Gm-Message-State: AOAM532Hw9xiFh605E1BggnyFGr5m//8DPMsKvmwQ8stj9HxAX7li3Z/ W56loJSoqt5ffWy22oFXHU1/jSA40HpSyBgf6vfTFQ== X-Google-Smtp-Source: ABdhPJzzZW5NTOwzcd4s6iBlTCAtQm4jPksXvll7EYQRwpd36sd8KR/52N/NSgSAceSB1YnXgptzUg8u7ES88BON9U8= X-Received: by 2002:a1c:b3c1:: with SMTP id c184mr1726075wmf.36.1589842518091; Mon, 18 May 2020 15:55:18 -0700 (PDT) MIME-Version: 1.0 References: <202005181120.971232B7B@keescook> In-Reply-To: <202005181120.971232B7B@keescook> From: Andy Lutomirski Date: Mon, 18 May 2020 15:55:06 -0700 Message-ID: Subject: Re: seccomp feature development To: Kees Cook Cc: Christian Brauner , Tycho Andersen , Sargun Dhillon , Matt Denton , Chris Palmer , Jeffrey Vander Stoep , Linux Containers , Linux API , LKML Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 18, 2020 at 2:05 PM Kees Cook wrote: > > Hi! > This is minor, but, if we grow seccomp_data, I would like to add the other 32 bits of the syscall nr to it. Syscall numbers are unsigned long, but they get munged into u32 for seccomp_data. Sure, no one uses those high bits yet, but if we're extending things anyway, let's support them.