Messages in this thread | | | From | Sami Tolvanen <> | Date | Fri, 1 Nov 2019 09:28:21 -0700 | Subject | Re: [PATCH v3 05/17] add support for Clang's Shadow Call Stack (SCS) |
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On Thu, Oct 31, 2019 at 8:51 PM Kees Cook <keescook@chromium.org> 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
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