From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964891AbWLTHJa (ORCPT ); Wed, 20 Dec 2006 02:09:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964894AbWLTHJa (ORCPT ); Wed, 20 Dec 2006 02:09:30 -0500 Received: from mail.gmx.net ([213.165.64.20]:48959 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S964891AbWLTHJ3 (ORCPT ); Wed, 20 Dec 2006 02:09:29 -0500 X-Authenticated: #14349625 Subject: Re: BUG: wedged processes, test program supplied From: Mike Galbraith To: Albert Cahalan Cc: linux-kernel In-Reply-To: <787b0d920612192205v2d650361r4f737c41aa1d3a92@mail.gmail.com> References: <787b0d920612191846t5a51a2e4ld4101b26ca7a8413@mail.gmail.com> <1166593200.1614.8.camel@Homer.simpson.net> <787b0d920612192205v2d650361r4f737c41aa1d3a92@mail.gmail.com> Content-Type: text/plain Date: Wed, 20 Dec 2006 08:09:25 +0100 Message-Id: <1166598565.1614.53.camel@Homer.simpson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.6.0 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2006-12-20 at 01:05 -0500, Albert Cahalan wrote: > On 12/20/06, Mike Galbraith wrote: > > On Tue, 2006-12-19 at 21:46 -0500, Albert Cahalan wrote: > > > Somebody PLEASE try this... > > > > I was having enough fun with cloninator (which was whitespace munged > > btw). > > Anything stuck? Besides refusing to die, that beast slays debuggers > left and right. I just need to add execve of /proc/self/exe and a massive > storm of signals on the alternate stack. Usually, I can kill the misbehaving strace or abandoned cloninators if it decides to take a hike, but sometimes it leaves corpses lying around. > Oh. I wanted to be sure you'd see the problem. Did you have > some... difficulty? A plain old ^C should make things stop. > The second test program is like the first, but missing SIGCHLD > >from the clone flags, and hopefully not whitespace-mangled. > > Note that the test program is not normally a fork bomb. > It self-limits itself to 42 tasks via a lock in shared memory. > If things are working OK, you should see no more than > about 60 tasks. I didn't take any countermeasures.. had ~27000 zombies. -Mike