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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 90F04C433E0 for ; Thu, 4 Mar 2021 11:31:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4FD6664E84 for ; Thu, 4 Mar 2021 11:31:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232783AbhCDLaX (ORCPT ); Thu, 4 Mar 2021 06:30:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240148AbhCDLaG (ORCPT ); Thu, 4 Mar 2021 06:30:06 -0500 Received: from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com [IPv6:2a00:1450:4864:20::32b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B3F4C061574; Thu, 4 Mar 2021 03:29:26 -0800 (PST) Received: by mail-wm1-x32b.google.com with SMTP id o2so8795166wme.5; Thu, 04 Mar 2021 03:29:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=EXj+J+opo6bTXx46F8tWrn1QfcSvSSbLWVP6KkmF29I=; b=DQFl1nHt/ucYGKlmXHOIxLo2dfBVM8gglnObwxMF6jqFKe4IV7GIZy4rD6NZNy+Isw 3y5fo1B7p4NBEzGKgknnGd8CQtlVD8/eWus4dB/HWqrXhPYToxFaw+Dr9Qk7f6FK+/Zn Jkq2KVAL3HlobisS9cPXYBj8I1mtxTwAk1raS3KpPt6G+XMkRm8xzHC7Q3OcBHu6gyRq 2lps9ZN4jts6U3yXohUCe88Lcqe3PQLBV0VPM69Z3LxhdqzPPknRoU2RHov/9DMhAnlJ 6aMoWKrefhSrbGbMn93hgnAKdJkgjmTHd5JkzZixuSLsd1pUPfFpUQAXhjHXf0xtT0CO FgOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=EXj+J+opo6bTXx46F8tWrn1QfcSvSSbLWVP6KkmF29I=; b=ZBLERXZk8vj9DXwncgEn/yMq9LgKfT+s5lBxQfk9HnTElFTD+K5bk4Ky9QllON+M9a CG5+3bSu+mYWF1Tu+qWTL8hvRCPQClvZdBsFFpEajeYgURZ0uARpjoZWDi5OsgF55gh4 IDhdGF3A1v35VgPEkSFGSH95r7cxS4dXTiiItw97RkND34b0COhATa6MClmrjALPlYkM MBdEaY5bw2FVDaGvCAUJ/lcbB1YZk3FT4KJAiVRjgfIopXvzJMqgEGiTdkoByHJaJRIQ Fvrms97Q6rpgNpHNT1pHG0NF0BFP/tdLvg26m10rleQ/dxYD/eDaYiDnhGARSYSxv+2N uQjQ== X-Gm-Message-State: AOAM530fpX+xCccIlJriIsjDwIYkL0iBpp+4PjJQwrOAlZrsjYL80Ny6 oK6MQj4xZRnbu5/rlSZ8TjQ= X-Google-Smtp-Source: ABdhPJxTXaQhS5ALia4wB+XNh9aexeJdLllkQvAd90g5CABkgfr+yuf/KDOiOa4qH04tQs8QWS2PiQ== X-Received: by 2002:a7b:c3c1:: with SMTP id t1mr3444924wmj.47.1614857364945; Thu, 04 Mar 2021 03:29:24 -0800 (PST) Received: from localhost.localdomain ([141.226.13.117]) by smtp.gmail.com with ESMTPSA id 3sm25196554wry.72.2021.03.04.03.29.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Mar 2021 03:29:24 -0800 (PST) From: Amir Goldstein To: Jan Kara Cc: Matthew Bobrowski , linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org Subject: [PATCH v2 0/2] unprivileged fanotify listener Date: Thu, 4 Mar 2021 13:29:19 +0200 Message-Id: <20210304112921.3996419-1-amir73il@gmail.com> X-Mailer: git-send-email 2.30.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org Jan, These patches try to implement a minimal set and least controversial functionality that we can allow for unprivileged users as a starting point. The patches were tested on top of v5.12-rc1 and the fanotify_merge patches using the unprivileged listener LTP tests written by Matthew and another LTP tests I wrote to test the sysfs tunable limits [1]. Thanks, Amir. Changes since v1: - Dropped marks per group limit in favor of max per user - Rename sysfs files from 'listener' to 'group' terminology - Dropped internal group flag FANOTIFY_UNPRIV - Limit unprivileged listener to FAN_REPORT_FID family - Report event->pid depending on reader capabilities [1] https://github.com/amir73il/ltp/commits/fanotify_unpriv Amir Goldstein (2): fanotify: configurable limits via sysfs fanotify: support limited functionality for unprivileged users fs/notify/fanotify/fanotify.c | 16 ++- fs/notify/fanotify/fanotify_user.c | 152 ++++++++++++++++++++++++----- fs/notify/fdinfo.c | 3 +- fs/notify/group.c | 1 - fs/notify/mark.c | 4 - include/linux/fanotify.h | 36 ++++++- include/linux/fsnotify_backend.h | 6 +- include/linux/sched/user.h | 3 - include/linux/user_namespace.h | 4 + kernel/sysctl.c | 12 ++- kernel/ucount.c | 4 + 11 files changed, 194 insertions(+), 47 deletions(-) -- 2.30.0