netdev - Re: [PATCH] kptr_restrict for hiding kernel pointers from unprivileged users

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Message-ID: <1291895472.2965.4.camel@Dan>
Date:	Thu, 09 Dec 2010 06:51:12 -0500
From:	Dan Rosenberg <drosenberg@...curity.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] kptr_restrict for hiding kernel pointers from
 unprivileged users


> 
> Thanks for not giving credits to people suggesting this idea to you
> (Thomas if I remember well), and not Ccing netdev where original
> discussion took place. 
> 

I am happy to credit Thomas, even though he is far from the first person
to have suggested this approach to me.  Thanks for the suggestion.

> 
> So caller can not block BH ?
> 
> This seems wrong to me, please consider :
> 
> normal process context :
> 
> spin_lock_bh() ...
> 
> for (...)  
> 	{xxx}printf( ...   "%pK"   ...)
> 
> spin_unlock_bh();
> 

I will think about this and address it.

-Dan

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