On Thu, Oct 20, 2022 at 09:29:38PM +0000, Edgecombe, Rick P wrote: > The code used to use shstk->base and shstk->size to keep track of if > shadow stack was enabled. I'm not sure why to zero it now. Just > defensively or did you see a concrete issue? Just to be defensive. It's not fast path by any means, to better to have values that make a bit of sense there. *shrug* It just stood out as feeling "missing" while I was reading the code. -- Kees Cook