Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762140AbXKNRvY (ORCPT ); Wed, 14 Nov 2007 12:51:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761846AbXKNRvF (ORCPT ); Wed, 14 Nov 2007 12:51:05 -0500 Received: from x346.tv-sign.ru ([89.108.83.215]:39313 "EHLO mail.screens.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761742AbXKNRvD (ORCPT ); Wed, 14 Nov 2007 12:51:03 -0500 Date: Wed, 14 Nov 2007 20:48:40 +0300 From: Oleg Nesterov To: Srivatsa Vaddagiri Cc: Andrew Morton , Grant Wilson , Ingo Molnar , Peter Zijlstra , "Rafael J. Wysocki" , Srivatsa Vaddagiri , linux-kernel@vger.kernel.org Subject: Re: 2.6.24-rc1-gb4f5550 oops Message-ID: <20071114174840.GA14193@tv-sign.ru> References: <20071114151708.GA12355@tv-sign.ru> <20071114163749.GH3359@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071114163749.GH3359@linux.vnet.ibm.com> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 686 Lines: 19 On 11/14, Srivatsa Vaddagiri wrote: > > On Wed, Nov 14, 2007 at 06:17:08PM +0300, Oleg Nesterov wrote: > > Suppose that old user_struct/task_group is freed/reused, and the task does > > Shouldn't this old user actually be the root user_struct? Well, the S_ISUID application can switch ->user from !root_user (note that setuid exec doesn't change ->user), and we also have CAP_SETUID... But yes, I agree, this all is very unlikely. Oleg. - 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/