Received: by 2002:a17:90b:8d0:0:0:0:0 with SMTP id ds16csp4882049pjb; Mon, 27 Jul 2020 07:30:53 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzmPlLHZ+RYwslZlSsvv74cO39jxubeeAk1mDi04c9eUBIPUuoPnYQEK1gBuy8WnGjT8OGX X-Received: by 2002:a17:907:4091:: with SMTP id nm1mr19251515ejb.208.1595860252800; Mon, 27 Jul 2020 07:30:52 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1595860252; cv=none; d=google.com; s=arc-20160816; b=zg6THMkgI2UW67Yl09L2nXlkhLF2bHQaXKsQNanqf3BSo5C9ep946sCiwlGgZH9HOF DS5HU1IvTwx9myORaShZFWay/corH2CpofRlR4LdQYcUkFVvR909GOqlXusfKC2a5pUt KDQsbiDnxgsuYPKoXV+cqx6X7ZxstDKkfngWskay+58lJcjMdAP647Tz4oQfw7K0gsFn T3msPgBebJOCl7RhY1rP+9uwxkAh53AH8Rkp70jAZY1t8vpqH1Txg3ZdbWp+CAfLBC02 cXeltqg4jAXuM/DnoZQhaocRuN+t2i5iCcI4mJYLz179gHwpsvM39UPbdp3i5Ae0SAyj icQw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from; bh=Atg7T2TMHwS09Ki6M/IaQwMYGQVmHpUTbWKBhbZ1aOk=; b=zSt59RRm66OAMgf1gcrTGS3sTFKApkPDaZjDBn3mQWjv7YQzkwBk6r82//w3D3zjGC zb2HLoRWnHN/BGVJmUQyUURZeqaXquZl7jN6f/Bu+GPE7/s2LUpyWzWZbDGM92xUgF2o DFMvR4JS9DNqs1pmzh6+8YZERuqFAyvFZAaa+Rbw1y+Zea6iJoM9ibzqVWWUOWnBGCQM 2vKEV9QSzB1A1oizOwW3wT51KyXx+jm3tZViI8jySyyivk8jYFmZ4p1kFRIhZFGlGhJb mW0tCxDYZx6ggWGx7nWLbD907eWrtdvH78dXTeG7oJ0UcyHXgafhGAYGs7R6z2pf6fvX 9AKA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id dg12si5526201edb.81.2020.07.27.07.30.30; Mon, 27 Jul 2020 07:30:52 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732080AbgG0OX0 (ORCPT + 99 others); Mon, 27 Jul 2020 10:23:26 -0400 Received: from raptor.unsafe.ru ([5.9.43.93]:51896 "EHLO raptor.unsafe.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732046AbgG0OXU (ORCPT ); Mon, 27 Jul 2020 10:23:20 -0400 Received: from comp-core-i7-2640m-0182e6.redhat.com (ip-89-102-33-211.net.upcbroadband.cz [89.102.33.211]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by raptor.unsafe.ru (Postfix) with ESMTPSA id BB28120479; Mon, 27 Jul 2020 14:15:40 +0000 (UTC) From: Alexey Gladkov To: LKML Cc: Linux FS Devel , Alexander Viro , Alexey Gladkov , "Eric W . Biederman" , Kees Cook Subject: [PATCH v1 0/2] proc: Relax check of mount visibility Date: Mon, 27 Jul 2020 16:14:09 +0200 Message-Id: <20200727141411.203770-1-gladkov.alexey@gmail.com> X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.6.1 (raptor.unsafe.ru [5.9.43.93]); Mon, 27 Jul 2020 14:15:41 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Alexey Gladkov (2): proc: Relax check of mount visibility Show /proc/self/net only for CAP_NET_ADMIN fs/namespace.c | 27 ++++++++++++++++----------- fs/proc/proc_net.c | 6 ++++++ fs/proc/root.c | 16 +++++++++------- include/linux/fs.h | 1 + 4 files changed, 32 insertions(+), 18 deletions(-) -- 2.25.4