linux-kernel - Re: [PATCH] ptrace: it is fun to strace /sbin/init

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Message-ID: <20080325144753.GA4128@ucw.cz>
Date:	Tue, 25 Mar 2008 15:47:54 +0100
From:	Pavel Machek <pavel@....cz>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Krzysztof Halasa <khc@...waw.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...sign.ru>, ebiederm@...ssion.com,
	xemul@...nvz.org, sds@...ho.nsa.gov, roland@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ptrace: it is fun to strace /sbin/init

Hi!

> > > I like the general idea -- i used to patch kernels to allow this too,
> > > but it is dangerous.
> > 
> > Though root-only. Root doesn't want to be limited and knows better
> > anyway. 
> 
> The problem is that you can deadlock if you are not very careful.

How is that different from ptracing any other process with _lot_ of
children -- like X? You'll get same zombies in both cases, leading to
same issues, no?

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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