MMU related code

[SeyedAlireza Sanaee]

Hi,

A BUGGY MMU may also have some security implications, like flawed
protection of one process against another one. MMU may work fine without
any performance or functionality issue. But it might reveal one's address
space to the others.

I'm not sure if what I have told is true but let me know if it is wrong pls!

Thanks

On Mon, Oct 29, 2018 at 9:50 AM <valdis.kletnieks at vt.edu> wrote:

> On Mon, 29 Oct 2018 00:08:12 +0800, Carter Cheng said:
>
> > Where do I find the code in the kernel related to the MMU and resolving
> > memory addresses? I am trying to understand what the implications are if
> > code like this has bugs and the impact on the various functions that
> return
> > chunks of memory for use via pointers (either as pages or kmalloc chunks)
> > etc.
>
> The results are easy enough to predict even without looking at the code.
> If your
> memory allocations are buggy, you get random memory overlays and
> corruption,
> attempts to access non-mapped physical or virtual memory addresses, and so
> on.
>
> Basically, all the same sorts of issues beginning C programmers encounter
> before
> they understand pointers.
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