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 :-(
