Re: [PATCH v19 06/25] x86/cet: Add control-protection fault handler

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On 2/8/2021 10:20 AM, Borislav Petkov wrote:
On Fri, Feb 05, 2021 at 10:00:21AM -0800, Yu, Yu-cheng wrote:
The ratelimit here is only for #CP, and its rate is not counted together
with other types of faults.  If a task gets here, it will exit.  The only
condition the ratelimit will trigger is when multiple tasks hit #CP at once,
which is unlikely.  Are you suggesting that we do not need the ratelimit
here?

I'm trying to first find out why is it there.

Is this something you've hit during testing and thought, oh well, this
needs a ratelimit or was it added just because?


I have not run into the situation. Initially it was there because other faults have it. When you asked, I went through it and put out my reasoning. I think it still makes sense to keep it.

--
Yu-cheng



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