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From: Oleg Nesterov <oleg@tv-sign.ru>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	ebiederm@xmission.com, xemul@openvz.org, pavel@ucw.cz,
	sds@tycho.nsa.gov, roland@redhat.com,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ptrace: it is fun to strace /sbin/init
Date: Tue, 25 Mar 2008 20:42:51 +0300	[thread overview]
Message-ID: <20080325174251.GA247@tv-sign.ru> (raw)
In-Reply-To: <87r6dzi0mw.fsf@basil.nowhere.org>

On 03/25, Andi Kleen wrote:
>
> Andrew Morton <akpm@linux-foundation.org> writes:
> > 
> > Why not just unconditionally enable root's abiltiy to ptrace init?
> 
> It would be fine to allow this unconditionally if there was some mechanism
> to make sure someone else takes over reaping childs while init is ptraced.

I think we can't do this. From my /etc/inittab:

	c1:1235:respawn:/sbin/agetty 38400 tty1 linux

If /sbin/agetty exits, we shouldn't reap it. /sbin/init should notice
the death of login, and respawn the new child.

Thanks to all for replies! I'll re-send this patch as one-liner, without
any boot params or sysctls, and with long CC list.

I hope someone (not me) will make a final authoritative decision ;)

Oleg.


  parent reply	other threads:[~2008-03-25 17:38 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-23 13:51 Oleg Nesterov
2008-03-24 16:01 ` Pavel Machek
2008-03-24 16:40   ` Oleg Nesterov
2008-03-24 22:39     ` Pavel Machek
2008-03-24 23:04       ` Oleg Nesterov
2008-03-24 23:09         ` Pavel Machek
2008-03-24 23:18           ` Oleg Nesterov
2008-03-24 23:26             ` Andrew Morton
2008-03-24 23:38               ` Oleg Nesterov
2008-03-25 12:03         ` Stephen Smalley
2008-03-25 13:40           ` Serge E. Hallyn
2008-03-25 14:37             ` Stephen Smalley
2008-03-25 18:06               ` Serge E. Hallyn
2008-03-25 19:07                 ` Herbert Poetzl
2008-03-25 21:55                 ` Pavel Machek
2008-03-26 15:31                   ` Andrew Morgan
2008-03-26 15:47                 ` Pavel Emelyanov
2008-03-24 22:29 ` Andrew Morton
2008-03-24 22:56   ` Oleg Nesterov
2008-03-24 23:08     ` Andrew Morton
2008-03-24 23:29       ` Oleg Nesterov
2008-03-25 10:00       ` Andi Kleen
2008-03-25 14:16         ` Krzysztof Halasa
2008-03-25 14:22           ` Andi Kleen
2008-03-25 14:30             ` Krzysztof Halasa
2008-03-25 14:35               ` Andi Kleen
2008-03-25 14:58                 ` Krzysztof Halasa
2008-03-25 14:47             ` Pavel Machek
2008-03-25 14:56               ` Andi Kleen
2008-03-25 17:42         ` Oleg Nesterov [this message]
2008-03-25 22:00         ` Roland McGrath

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