Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932135AbbBZM0X (ORCPT ); Thu, 26 Feb 2015 07:26:23 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:51941 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752769AbbBZM0W (ORCPT ); Thu, 26 Feb 2015 07:26:22 -0500 Date: Thu, 26 Feb 2015 13:27:07 +0100 From: Pavel Machek To: Christoph Lameter Cc: Serge Hallyn , Serge Hallyn , Andy Lutomirski , Jonathan Corbet , Aaron Jones , "Ted Ts'o" , linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@linuxfoundation.org, morgan@kernel.org Subject: Re: [capabilities] Allow normal inheritance for a configurable set of capabilities Message-ID: <20150226122707.GA27733@Nokia-N900> References: <20150202171257.GD24351@ubuntumail> <20150225215014.GD29527@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1057 Lines: 27 On Wed 2015-02-25 17:59:04, Christoph Lameter wrote: > On Wed, 25 Feb 2015, Pavel Machek wrote: > > > One solution is to put capabilities into the elf executable. I believe > > there was patch for that. That means you don't need to add capability > > support into filesystems... > > Ummm... So I can just get any caps by modifying the ELF header? > Looking at the docs No, it just drops caps so binaries must be > setsuid. exactly. Normal apps are not currently allowed to receive capabilities, because they may not be ready for them. So add an elf note marking what capabilities it can deal with. No need for setuid if caller has the capabilities already. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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/