From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758017AbXJGX4z (ORCPT ); Sun, 7 Oct 2007 19:56:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751409AbXJGX4s (ORCPT ); Sun, 7 Oct 2007 19:56:48 -0400 Received: from nf-out-0910.google.com ([64.233.182.185]:60013 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751290AbXJGX4r (ORCPT ); Sun, 7 Oct 2007 19:56:47 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=UNeJ7+yosnRbDBNC83nElvKGQjQRxf2N3FyILFuIN8JDckoacVZ5D7XHsmnwvyZ3E4kSPhjcOxJVlhwwK8luOO4GfPMpWjQIUwpRcB7acYL7JCItwfWoRKi/fmTbepeDkaxhyQidewKek2uFaLGk/4YXyHJpKxWu0cZFsMx9Eiw= Message-ID: <2c0942db0710071656q1e54dbe4pf04a9dbbed018f4b@mail.gmail.com> Date: Sun, 7 Oct 2007 16:56:42 -0700 From: "Ray Lee" To: "Luciano Rocha" , "Ray Lee" , linux-kernel@vger.kernel.org, "Srivatsa Vaddagiri" , "Ingo Molnar" , dhaval@linux.vnet.ibm.com Subject: Re: can't change euid 0 to uid != running user In-Reply-To: <20071007164937.GA4382@bit.office.eurotux.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20071005142541.GA9224@bit.office.eurotux.com> <2c0942db0710050828jcb161c0qc10e65f7f65af6c4@mail.gmail.com> <20071007164937.GA4382@bit.office.eurotux.com> X-Google-Sender-Auth: 9890a7c3a8413e34 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 10/7/07, Luciano Rocha wrote: > On Fri, Oct 05, 2007 at 08:28:50AM -0700, Ray Lee wrote: > > On 10/5/07, Luciano Rocha wrote: > > > I have the following problem: > > > $ sudo -u ie -s # or sudo su ie > > > unable to change to runas uid: Resource temporarily unavailable > > > > > > Works: > > > $ sudo su, followed by su ie > > > [........] > > > (Clone of Linus' tree, after rc9, with some patches from > > > mingo/linux-2.6-sched-devel.git, and a fix for lguest (didn't link due > > > to kasprintf)). > > > > Hmm, it works for me under 2.6.23-rc6, so it's either a difference > > between our .configs or a late regression. If you could bisect the > > problem (starting with reverting Ingo's sched devel patches and lguest > > patches, and trying that), then that would tell us where the issue is. > > > > Without the patches, i.e., a clean Linus tree (v2.6.23-rc9-41-g804b3f9), > I can't reproduce it anymore. > Okay, so it's probably the issue Srivatsa identified and mentioned to you, regarding a possible bug in the CFS-devel tree: > This seems to be similar to the problem Ingo reported > (http://marc.info/?l=linux-kernel&m=119125007102969). We have sent a fix > for it subsequently (http://marc.info/?l=linux-kernel&m=119143193812026). > > Can you resync to Ingo's latest cfs-devel tree (which will remove the > bad patch you have), then apply the patch at > http://marc.info/?l=linux-kernel&m=119143193812026 and verify if the > problem goes away? Ray