netdev - Re: RFC: disablenetwork facility. (v4)

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Message-ID: <20091227121849.GY18217@ZenIV.linux.org.uk>
Date:	Sun, 27 Dec 2009 12:18:49 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:	pavel@....cz, michael@...top.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, linux-security-module@...r.kernel.org,
	andi@...stfloor.org, david@...g.hm, socketcan@...tkopp.net,
	alan@...rguk.ukuu.org.uk, herbert@...dor.apana.org.au,
	Valdis.Kletnieks@...edu, bdonlan@...il.com, zbr@...emap.net,
	cscott@...ott.net, jmorris@...ei.org, ebiederm@...ssion.com,
	bernie@...ewiz.org, mrs@...hic-beasts.com, randy.dunlap@...cle.com,
	xiyou.wangcong@...il.com, sam@...ack.fr, casey@...aufler-ca.com,
	serue@...ibm.com
Subject: Re: RFC: disablenetwork facility. (v4)

On Sun, Dec 27, 2009 at 08:49:17PM +0900, Tetsuo Handa wrote:

> We can determine what syscalls we need from application's code and libc's code,
> can't we?

_Which_ libc?  And no, I'm not talking about other implementations; even
glibc is more than enough.  It changes and it *does* change the set of
syscalls used to implement given function.

I'm not disagreeing about what's seccomp worth, BTW.
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