How to change page permission from inside the kernel?

[Ruben Safir]

On 07/06/2018 02:06 PM, Ahmed Soliman wrote:
> I have a memory page allocated with mmap() from user space, This
> address is passed to some kernel module (kvm_intel to be specific) and
> i want to know how can I change the page permission from inside there
> My goal is to achieve something like this
>               mprotect(mem, PAGE_SIZE, PROT_READ)
> except for mprotect can't be called from the kernel, and I couldn't
> find the right way to do it.
> 
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sounds like a good way to make a virus

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