From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759406AbYENHfP (ORCPT ); Wed, 14 May 2008 03:35:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753279AbYENHfA (ORCPT ); Wed, 14 May 2008 03:35:00 -0400 Received: from qb-out-0506.google.com ([72.14.204.239]:22807 "EHLO qb-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753362AbYENHe7 (ORCPT ); Wed, 14 May 2008 03:34:59 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=B2QTw8/7ELlRSnpVNaiDlD3Te8gyUNXhktD6XqMyb466gwG/D1LYbsJy5EWqDQ8eTiQymtKKzq+s7Yn2xTnDyaQsbMUWUUU9yq7Y8plfvZvJPmX22rUk6fFeJyr8lQD7RWshYlq2DEWDNEeVLVvLVD2gX4uTV5Y9wb9kbUs3z3s= Message-ID: <19f34abd0805140034j75d97ecbw5a03c200645768cb@mail.gmail.com> Date: Wed, 14 May 2008 09:34:57 +0200 From: "Vegard Nossum" To: "Harald Dunkel" Subject: Re: 2.6.25.3: su gets stuck for root Cc: linux-kernel@vger.kernel.org In-Reply-To: <4829D345.7020909@t-online.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4829326A.6060808@t-online.de> <19f34abd0805122347x4d9c5d03m16679d724189790e@mail.gmail.com> <4829D345.7020909@t-online.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 13, 2008 at 7:43 PM, Harald Dunkel wrote: > Vegard Nossum wrote: > > > Can you try to run "strace su someuser" instead? > > I tried, but its a Heisenbug: If I run it with strace (with or without > -f), then it doesn't get stuck. Ah, tough luck. What if you attach an strace to the already stuck process? Like strace -p pid. It's a long shot, but worth a try, I suppose. You could also try to use sysrq to output some useful information about the stuck process. See Documentation/sysrq.txt for more information. Gotta run, good luck! Vegard -- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036