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SubjectRe: [PATCH v10 01/26] Documentation/x86: Add CET description
On Sat, May 16, 2020 at 03:09:22PM +0100, Andrew Cooper wrote:

> Sadly, the same is not true for kernel shadow stacks.
> SSP is 0 after SYSCALL, SYSENTER and CLRSSBSY, and you've got to be
> careful to re-establish the shadow stack before a CALL, interrupt or
> exception tries pushing a word onto the shadow stack at 0xfffffffffffffff8.

Oh man, I can only imagine the joy that brings to #NM and friends :-(

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