From mboxrd@z Thu Jan 1 00:00:00 1970 From: Radoslaw Szkodzinski (AstralStorm) Subject: Re: [patch 1/2] [RFC] Simple tamper-proof device filesystem. Date: Tue, 18 Dec 2007 16:33:02 +0100 Message-ID: <20071218163302.3f54de45@astralstorm.puszkin.org> References: <200712162026.BFJ01924.tOFJSFOQMVHOLF@I-love.SAKURA.ne.jp> <47650C88.6040105@davidnewall.com> <200712162036.JAJ09389.OQOVtOHMFLFSFJ@I-love.SAKURA.ne.jp> <476512F1.5010701@davidnewall.com> <200712162103.IEC69233.FFOFOOtJMQHSLV@I-love.SAKURA.ne.jp> <200712162114.BJE04102.tOMFHOOFSJVQFL@I-love.SAKURA.ne.jp> <47661096.7020107@davidnewall.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/+MWAjzo.w_gtxMS2pRC=ZHN"; protocol="application/pgp-signature"; micalg=PGP-SHA1 Cc: Tetsuo Handa , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org To: David Newall Return-path: Received: from chello089077114002.chello.pl ([89.77.114.2]:36213 "EHLO astralstorm.puszkin.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751641AbXLRPdO (ORCPT ); Tue, 18 Dec 2007 10:33:14 -0500 In-Reply-To: <47661096.7020107@davidnewall.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: --Sig_/+MWAjzo.w_gtxMS2pRC=ZHN Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 17 Dec 2007 16:30:54 +1030 David Newall wrote: > Tetsuo Handa wrote: > > If Bob is malicious and creates /dev/sda1 with block-8-2 attribute [...] >=20 > Bob can't do that. Only root can. Not even root can, if you remove him the capability. Only udev can. (which possibly doesn't have to run as root, given correct capability set?) Of course root may be able to change the configuration of udev to create device nodes of his liking if you allow that... --Sig_/+MWAjzo.w_gtxMS2pRC=ZHN Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.7 (GNU/Linux) iD8DBQFHZ+g0BlhXA0ALOYMRAnXvAJ4vn5xjQB6WayfS1Zz1ytnXePuvKQCgjB/n N/EHRP9zLd13TkVnyZV8sBI= =sNnv -----END PGP SIGNATURE----- --Sig_/+MWAjzo.w_gtxMS2pRC=ZHN--