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=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 AC475C43381 for ; Thu, 18 Mar 2021 05:55:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C13E64EB6 for ; Thu, 18 Mar 2021 05:55:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229702AbhCRFzH (ORCPT ); Thu, 18 Mar 2021 01:55:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56342 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229725AbhCRFyg (ORCPT ); Thu, 18 Mar 2021 01:54:36 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09AB5C061760 for ; Wed, 17 Mar 2021 22:54:36 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id t18so2336498pjs.3 for ; Wed, 17 Mar 2021 22:54:35 -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=rJROOKajOtciafbi5yKM+xYoRKUUdF2HFDVh5pjYjDc=; b=V3a61EFeK8DCdYgpexeyYbDeJ6iJDfdbxjAeD7lChv/gRGorl33DJ3BMUviRPySs58 DqijCIGczHsOaQVQTiwCTUbFxa8OJ6lH/P01tnCJpz/Gr5aQL2Nif/8XBHB5io4qZOGI LQyqTdOAUqrjefaJTahNsu8cRz7TQMUn4rLa0= 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=rJROOKajOtciafbi5yKM+xYoRKUUdF2HFDVh5pjYjDc=; b=V1KF5a0BQVvx9TSiS1BbVMmq2mBtqXNYZ+7vReiIb0yi7Z649r88l8olFLlIjS//7K znOjYzZv8cq//htyW2MBSiUQTeKpoGP7LHzy7637um8YA+NAR/S5GIBZ/NvsR87b/jvU /9NKPu4WCOJ6DYtp280PWV6k37eq4svAOLjZ8pJuuZOmoT0hP05Ly0qvlEMFvLqdDDpF IHZ9gSVJx8auQ8KwWhTX0oYuLg9hFPtRTiSAYeAsuD6FEoVRlQhGMSMoZ+Jrh+AzbqJe eukWRi0mDe2RJvd6H6zqdjury930HzWi+jTIAWtQatkAgC+ervopGNqP2/I87Gwjjn3a 98WA== X-Gm-Message-State: AOAM530bBzzLKurVJX4rBF6ivnqNbo0UM2ANGHmJ3jx7gTHErsn6QGEm zvuO2B2BrEEiB7JNs2PJUmi4Uw== X-Google-Smtp-Source: ABdhPJyfFKA4Cehmeh/BMzSXGkh4TwwBYXL3HOfY3RvVilv2kLybdPLaFSKBIWTPt29ZHHbUQvDtrA== X-Received: by 2002:a17:90a:5284:: with SMTP id w4mr2464303pjh.29.1616046875626; Wed, 17 Mar 2021 22:54:35 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id y24sm884896pfn.213.2021.03.17.22.54.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Mar 2021 22:54:35 -0700 (PDT) Date: Wed, 17 Mar 2021 22:54:34 -0700 From: Kees Cook To: Kalesh Singh Cc: jannh@google.com, jeffv@google.com, surenb@google.com, minchan@kernel.org, hridya@google.com, rdunlap@infradead.org, christian.koenig@amd.com, willy@infradead.org, viro@zeniv.linux.org.uk, kernel-team@android.com, Alexey Dobriyan , Jonathan Corbet , Andrew Morton , Michal Hocko , Mauro Carvalho Chehab , Alexey Gladkov , "Eric W. Biederman" , Christian Brauner , Michel Lespinasse , Bernd Edlinger , Andrei Vagin , Helge Deller , James Morris , Serge Hallyn , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org Subject: Re: [RESEND PATCH v6 2/2] procfs/dmabuf: Add inode number to /proc/*/fdinfo Message-ID: <202103172254.478DE154@keescook> References: <20210308170651.919148-1-kaleshsingh@google.com> <20210308170651.919148-2-kaleshsingh@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210308170651.919148-2-kaleshsingh@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 08, 2021 at 05:06:41PM +0000, Kalesh Singh wrote: > And 'ino' field to /proc//fdinfo/ and > /proc//task//fdinfo/. > > The inode numbers can be used to uniquely identify DMA buffers > in user space and avoids a dependency on /proc//fd/* when > accounting per-process DMA buffer sizes. > > Signed-off-by: Kalesh Singh Reviewed-by: Kees Cook -- Kees Cook