Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755576AbYCXXJA (ORCPT ); Mon, 24 Mar 2008 19:09:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753110AbYCXXIw (ORCPT ); Mon, 24 Mar 2008 19:08:52 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:35910 "EHLO gprs189-60.eurotel.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752738AbYCXXIw (ORCPT ); Mon, 24 Mar 2008 19:08:52 -0400 Date: Tue, 25 Mar 2008 00:09:30 +0100 From: Pavel Machek To: Oleg Nesterov Cc: Andrew Morton , "Eric W. Biederman" , Pavel Emelyanov , Stephen Smalley , Roland McGrath , linux-kernel@vger.kernel.org Subject: Re: [PATCH] ptrace: it is fun to strace /sbin/init Message-ID: <20080324230930.GE2426@elf.ucw.cz> References: <20080323135110.GA294@tv-sign.ru> <20080324160102.GB4069@atrey.karlin.mff.cuni.cz> <20080324164059.GA4767@tv-sign.ru> <20080324223925.GD2426@elf.ucw.cz> <20080324230458.GA173@tv-sign.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080324230458.GA173@tv-sign.ru> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1218 Lines: 34 On Tue 2008-03-25 02:04:58, Oleg Nesterov wrote: > On 03/24, Pavel Machek wrote: > > > > > /sbin/init is important, but there are other important (and sometimes > > > much more important) services. Why it is so special so that we can't > > > debug/strace it? > > > > Maybe. Let's kill /sbin/init protection in 2.6.26. But making it > > optional is wrong. > > You are right, the boot parameter is silly. How about sysctl? I'd prefer it to be hardcoded, really. "You can kill /sbin/init" sounds right. "You can kill /sbin/init on 2.6.26+" sounds... still quite ok. "You can kill /sbin/init on 2.6.26+ if you have /proc/sys/foo/bar == 1" sounds... quite wrong. > Stephen, do you see any security problems if we make /sbin/init > ptraceable by default? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html pomozte zachranit klanovicky les: http://www.ujezdskystrom.info/ -- 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/