Possible to set security.bsd.stack_guard_page to a negative value

[Shawn Webb]

Even though it'd be a stupid thing to do, the
security.bsd.stack_guard_page sysctl node can be set to a negative
integer value. This will cause all applications to crash with SIGABRT.

-- 
Shawn Webb
Cofounder and Security Engineer
HardenedBSD

GPG Key ID:          0x6A84658F52456EEE
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