On 05/30/2017 10:48 PM, James Morris wrote:

On Mon, 29 May 2017, Boris Lukashev wrote:

quoted

With all due respect sir, i believe your review falls short of the
purpose of this effort - to harden the kernel against flaws in
userspace.

Which effort?  Kernel self protection is about protecting against flaws in
the kernel.

See:
https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project

  "This project starts with the premise that kernel bugs have a very long
   lifetime, and that the kernel must be designed in ways to protect against
   these flaws."

We need to avoid conflating:

- hardening the kernel against attack; and
- modifying the kernel to try and harden userspace.

These patches are the latter, and the case for them is not as
straightforward.


- James

I agree that these patches aren't kernel self protection and I don't
believe I have claimed they are such a thing. These patches I'm
presenting are more akin to ptrace protections that are found in Yama.
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