From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030277AbWGMSaQ (ORCPT ); Thu, 13 Jul 2006 14:30:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030278AbWGMSaQ (ORCPT ); Thu, 13 Jul 2006 14:30:16 -0400 Received: from e2.ny.us.ibm.com ([32.97.182.142]:11212 "EHLO e2.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1030277AbWGMSaN (ORCPT ); Thu, 13 Jul 2006 14:30:13 -0400 Subject: Re: [PATCH -mm 5/7] add user namespace From: Dave Hansen To: "Eric W. Biederman" Cc: "Serge E. Hallyn" , Cedric Le Goater , linux-kernel@vger.kernel.org, Andrew Morton , Kirill Korotaev , Andrey Savochkin , Herbert Poetzl , Sam Vilain In-Reply-To: References: <20060711075051.382004000@localhost.localdomain> <20060711075420.937831000@localhost.localdomain> <44B50088.1010103@fr.ibm.com> <44B684A5.2040008@fr.ibm.com> <20060713174721.GA21399@sergelap.austin.ibm.com> Content-Type: text/plain Date: Thu, 13 Jul 2006 11:29:50 -0700 Message-Id: <1152815391.7650.58.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.4.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2006-07-13 at 12:14 -0600, Eric W. Biederman wrote: > Maybe. I really think the sane semantics are in a different uid namespace. > So you can't assumes uids are the same. Otherwise you can't handle open > file descriptors or files passed through unix domain sockets. Eric, could you explain this a little bit more? I'm not sure I understand the details of why this is a problem? -- Dave