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=-8.7 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 1DEF7C433E0 for ; Wed, 10 Mar 2021 18:20:26 +0000 (UTC) Received: from smtp1.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C09B364DC4 for ; Wed, 10 Mar 2021 18:20:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C09B364DC4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=containers-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp1.osuosl.org (Postfix) with ESMTP id 7155E8439B; Wed, 10 Mar 2021 18:20:25 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp1.osuosl.org ([127.0.0.1]) by localhost (smtp1.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id x0UYV8mKBuB8; Wed, 10 Mar 2021 18:20:24 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp1.osuosl.org (Postfix) with ESMTP id 7632F84165; Wed, 10 Mar 2021 18:20:24 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4FC8BC000A; Wed, 10 Mar 2021 18:20:24 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [IPv6:2605:bc80:3010::133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 99E8EC0001 for ; Wed, 10 Mar 2021 18:20:21 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 875F6431C7 for ; Wed, 10 Mar 2021 18:20:21 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZtAZiKAzANso for ; Wed, 10 Mar 2021 18:20:20 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from raptor.unsafe.ru (raptor.unsafe.ru [5.9.43.93]) by smtp2.osuosl.org (Postfix) with ESMTP id 4177D42FC6 for ; Wed, 10 Mar 2021 18:20:20 +0000 (UTC) Received: from comp-core-i7-2640m-0182e6.redhat.com (ip-94-113-225-162.net.upcbroadband.cz [94.113.225.162]) by raptor.unsafe.ru (Postfix) with ESMTPSA id 677E940CE4; Wed, 10 Mar 2021 18:20:16 +0000 (UTC) From: Alexey Gladkov To: LKML , "Eric W . Biederman" Subject: [PATCH v5 0/5] proc: Relax check of mount visibility Date: Wed, 10 Mar 2021 19:19:55 +0100 Message-Id: X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.6.4 (raptor.unsafe.ru [0.0.0.0]); Wed, 10 Mar 2021 18:20:19 +0000 (UTC) Cc: Linux FS Devel , Linux Containers , Alexey Gladkov , Alexander Viro , Kees Cook X-BeenThere: containers@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux Containers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: containers-bounces@lists.linux-foundation.org Sender: "Containers" If only the dynamic part of procfs is mounted (subset=pid), then there is no need to check if procfs is fully visible to the user in the new user namespace. Changelog --------- v4: * Set SB_I_DYNAMIC only if pidonly is set. * Add an error message if subset=pid is canceled during remount. v3: * Add 'const' to struct cred *mounter_cred (fix kernel test robot warning). v2: * cache the mounters credentials and make access to the net directories contingent of the permissions of the mounter of procfs. -- Alexey Gladkov (5): docs: proc: add documentation about mount restrictions proc: Show /proc/self/net only for CAP_NET_ADMIN proc: Disable cancellation of subset=pid option proc: Relax check of mount visibility docs: proc: add documentation about relaxing visibility restrictions Documentation/filesystems/proc.rst | 18 ++++++++++++++++++ fs/namespace.c | 27 ++++++++++++++++----------- fs/proc/proc_net.c | 8 ++++++++ fs/proc/root.c | 25 +++++++++++++++++++------ include/linux/fs.h | 1 + include/linux/proc_fs.h | 1 + 6 files changed, 63 insertions(+), 17 deletions(-) -- 2.29.2 _______________________________________________ Containers mailing list Containers@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/containers