linux-kernel - Re: mprotect abuse in slim

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Message-ID: <20070109205447.GF6602@sequoia.sous-sol.org>
Date:	Tue, 9 Jan 2007 12:54:47 -0800
From:	Chris Wright <chrisw@...s-sol.org>
To:	Christoph Hellwig <hch@...radead.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Mimi Zohar <zohar@...ibm.com>, akpm@...l.org,
	kjhall@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	safford@...son.ibm.com
Subject: Re: mprotect abuse in slim

* Christoph Hellwig (hch@...radead.org) wrote:
> On Mon, Jan 08, 2007 at 07:07:25PM -0800, Arjan van de Ven wrote:
> > maybe this is a silly question, but do you revoke not only the current
> > fd entries, but also the ones that are pending in UNIX domain sockets
> > and that are already being sent to the process? If not.. then you might
> > as well not bother ;)
> 
> Exactly.  What these folks want is revoke (maybe more fine grained, but
> that's not the point).  And guess what folks, revoke is not trivial,
> otherwise we'd have it.  If you want to volunteer to implement a full-blown
> revoke that's fine, but
> 
>   a) it belongs into core code
>   b) needs to be done right

Very much agreed.  There's way too many holes in half-way done revocation.

thanks,
-chris
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