linux-kernel - Re: [PATCH] mm: use %pK for /proc/vmallocinfo

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Message-ID: <alpine.DEB.2.00.1210022209070.9523@chino.kir.corp.google.com>
Date:	Tue, 2 Oct 2012 22:12:43 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Kees Cook <keescook@...omium.org>
cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan@...nel.org>,
	Joe Perches <joe@...ches.com>,
	Kautuk Consul <consul.kautuk@...il.com>, linux-mm@...ck.org,
	Brad Spengler <spender@...ecurity.net>
Subject: Re: [PATCH] mm: use %pK for /proc/vmallocinfo

On Tue, 2 Oct 2012, Kees Cook wrote:

> In the paranoid case of sysctl kernel.kptr_restrict=2, mask the kernel
> virtual addresses in /proc/vmallocinfo too.
> 
> Reported-by: Brad Spengler <spender@...ecurity.net>
> Signed-off-by: Kees Cook <keescook@...omium.org>

/proc/vmallocinfo is S_IRUSR, not S_IRUGO, so exactly what are you trying 
to protect?
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