Re: [PATCH v2] x86,ibt: Use UDB instead of 0xEA

[H. Peter Anvin]

On 2025-09-02 12:37, Alexei Starovoitov wrote:
> 
> I suspect that 'reserved' opcode will not be used any time soon.
> If 10 years from now the opcode is used in some future CPU that CPU
> is better to be not vulnerable and CFI, FineIBT things will be
> gone from the kernel by then.
> So I would do absolutely nothing and just ignore the lack of blessing.
> 

What makes you say that? *Please* don't make these kinds of assumptions -- it
causes massive headaches for both us chip makers and for users.

	-hpa