Reproducible panic with MAP_GUARD and security.bsd.stack_guard_page > 1

[Shawn Webb]

When running my Stack Clash PoC on a vanilla FreeBSD 12-CURRENT/amd64 VM
and security.bsd.stack_guard_page is > 1:

https://goo.gl/photos/vZQY4B9jKJRLrNwP7

The PoC doesn't need to be run as root on vanilla FreeBSD with a default
configuration.

Thanks,

-- 
Shawn Webb
Cofounder and Security Engineer
HardenedBSD

GPG Key ID:          0x6A84658F52456EEE
GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89  3D9E 6A84 658F 5245 6EEE
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