linux-kernel - Re: [patch] mm: recheck lock rlim after f

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Message-ID: <20070713095337.GB16304@infradead.org>
Date:	Fri, 13 Jul 2007 10:53:37 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	Christoph Hellwig <hch@...radead.org>, Jes Sorensen <jes@....com>,
	Dmitry Monakhov <dmonakhov@...ru>, linux-kernel@...r.kernel.org
Subject: Re: [patch] mm: recheck lock rlim after f_op->mmap() method

On Wed, Jul 11, 2007 at 07:03:36PM +0100, Hugh Dickins wrote:
> Well, they'll get what they deserve.  I'm not convinced Dmitry's right
> about their nopage; and I'm not going to waste any more time working
> out ways to protect ourselves from them.  Let's stick with the mspec.

I'm not just concerned about the ati driver.  There's a lot of driver
that do or did really stupid stuff with mmap, including in-tree drivers.
the actual mmap() code is not actually a fastpath so additional sanity
checks can't hurt.  It might not be worth the effort for ->nopage, though.

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