Re: Hooks and stacking

From: John Richard Moser (nigelenki@private)
Date: Thu Mar 31 2005 - 09:55:58 PST


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Stephen Smalley wrote:
> On Thu, 2005-03-31 at 11:17 -0500, John Richard Moser wrote:
> 
>>That *blocks* illegal states; but it's been proven in PaX that sometimes
>>the program(mer) didn't exactly think, and just 'OH PROT_* WILL ALWAYS
>>WERK :D :D :D' and commonly we know better.  Why break 80% of the world
>>when you can break 0.001% of the world and still gain a higher level of
>>security?
>>
>>For example, I think all libraries are typically mapped RwX. . . wanna
>>break ld.so?
> 
> 
> I really don't follow what you are saying.  Are you saying that the
> SELinux controls on mmap/mprotect to prevent bad states are breaking 80%
> of the world?  Not AFAICS.

Nope, but I'd guess they would.  I don't really know :)

Are they?

> 
> 
>>Reiser + SeLinux == infinite loop == freeze; Method said it had
>>something to do with xattrs being created as files, which SeLinux
>>suddenly wants to label, which creates more files for xattrs, which
>>SeLinux suddenly wants to label. . . . . . . . . *RESET*
> 
> 
> That's been fixed upstream.  As of 2.6.12-rc1 or later.
> 

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