On Thu, Oct 31, 2019 at 8:51 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > +/* A random number to mark the end of the shadow stack. */ > > +#define SCS_END_MAGIC 0xaf0194819b1635f6UL > > Is 0xaf.... non-canonical for arm64? While "random", it should also > likely be an "impossible" value to find on the call stack. Agreed, and yes, this is non-canonical for arm64 and AFAIK all 64-bit architectures the kernel supports. I'll add a note about it. Sami
