Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261430AbVDZJaT (ORCPT ); Tue, 26 Apr 2005 05:30:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261435AbVDZJaM (ORCPT ); Tue, 26 Apr 2005 05:30:12 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:6095 "EHLO atrey.karlin.mff.cuni.cz") by vger.kernel.org with ESMTP id S261430AbVDZJaF (ORCPT ); Tue, 26 Apr 2005 05:30:05 -0400 Date: Tue, 26 Apr 2005 11:30:01 +0200 From: Martin Mares To: Miklos Szeredi Cc: jamie@shareable.org, linuxram@us.ibm.com, 7eggert@gmx.de, bulb@ucw.cz, viro@parcelfarce.linux.theplanet.co.uk, hch@infradead.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@osdl.org Subject: Re: [PATCH] private mounts Message-ID: <20050426093001.GA2419@atrey.karlin.mff.cuni.cz> References: <3WWGj-3nm-3@gated-at.bofh.it> <3WWQ9-3uA-15@gated-at.bofh.it> <3WWZG-3AC-7@gated-at.bofh.it> <3X630-2qD-21@gated-at.bofh.it> <3X8HA-4IH-15@gated-at.bofh.it> <3Xagd-5Wb-1@gated-at.bofh.it> <1114445923.4480.94.camel@localhost> <20050425191015.GC28294@mail.shareable.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.6+20040907i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1029 Lines: 25 Hello! > - mount owner should not get illegitimate access to information from > other users' and the super user's processes [...] > 3) any process running with fsuid different from the owner is denied > all access to the filesystem This smells. Denying access to root doesn't make any sense. I agree that it could help in some corner cases (like avoiding automated backup from backing up user filesystems), but in the end it's going to be an annoyance. Per-user namespaces (set up by PAM) look as a very reasonable solution. Have a nice fortnight -- Martin `MJ' Mares http://atrey.karlin.mff.cuni.cz/~mj/ Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth "A semicolon. Another line ends in the dance of camel." -- Kabir Ahuja - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/