Re: [PATCH 00/11] x86: Supervisor Mode Access Prevention

[Ingo Molnar]

* Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

> On Fri, Sep 21, 2012 at 12:43 PM, H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> wrote:
>
> > Supervisor Mode Access Prevention (SMAP) is a new security 
> > feature disclosed by Intel in revision 014 of the Intel® 
> > Architecture Instruction Set Extensions Programming 
> > Reference:
> 
> Looks good.
> 
> Did this find any bugs, btw? We've had a few cases where we 
> forgot to use the proper user access function, and code just 
> happened to work because it all boils down to the same thing 
> and never got any page faults in practice anyway..

The 4g:4g patch sweeped out most of the historic ones - so what 
we have are perhaps newer bugs (but those should be pretty rare, 
most new features are cross-arch).

Thanks,

	Ingo
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