linux-kernel - Re: [PATCH 5/5] ptrace: it is fun to strace /sbin/init

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Message-ID: <20080320162718.GA4397@ucw.cz>
Date:	Thu, 20 Mar 2008 17:27:18 +0100
From:	Pavel Machek <pavel@....cz>
To:	Oleg Nesterov <oleg@...sign.ru>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Davide Libenzi <davidel@...ilserver.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Ingo Molnar <mingo@...e.hu>,
	Laurent Riffard <laurent.riffard@...e.fr>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Roland McGrath <roland@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] ptrace: it is fun to strace /sbin/init


> Ptracing of /sbin/init is not allowed. Of course, this is very dangerous, but
> may be useful. Introduce the kernel boot parameter to allow this.
...
> @@ -803,6 +803,8 @@ and is between 256 and 4096 characters. 
>  			Run specified binary instead of /sbin/init as init
>  			process.
>  
> +	init_ptrace	[KNL] Allows to ptrace init. Very dangerous. Don't use.
> +

I don't know what ptracing init is good for, and I believe people
wanting to do this kind of special stuff can patch their own kernel...


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