https://security.stackexchange.com/questions/139238/why-does...

kern.wxabort=1
# grep kern.wxabort /etc/sysctl.conf
kern.wxabort=1
#
and rebooted, then ran the paxtest:

# ./paxtest blackhat                                                                                                                                        
PaXtest - Copyright(c) 2003-2016 by Peter Busser <peter@adamantix.org> and Brad Spengler <spender@grsecurity.net>
Released under the GNU Public Licence version 2 or later

Writing output to /root/paxtest.log
It may take a while for the tests to complete
Test results:
gcc: no input files

Executable anonymous mapping             : Killed
Executable bss                           : Killed
Executable data                          : Killed
Executable heap                          : Killed
Executable stack                         : Killed
Executable anonymous mapping (mprotect)  : Vulnerable
Executable bss (mprotect)                : Vulnerable
Executable data (mprotect)               : Vulnerable
Executable heap (mprotect)               : Vulnerable
Executable shared library bss (mprotect) : Vulnerable
Executable shared library data (mprotect): Vulnerable
Executable stack (mprotect)              : Killed
Anonymous mapping randomization test     : 33 quality bits (guessed)
Heap randomization test (ET_EXEC)        : 38 quality bits (guessed)
Main executable randomization (ET_EXEC)  : 25 quality bits (guessed)
Shared library randomization test        : 33 quality bits (guessed)
Stack randomization test (SEGMEXEC)      : 20 quality bits (guessed)
Stack randomization test (PAGEEXEC)      : 20 quality bits (guessed)
Arg/env randomization test (SEGMEXEC)    : 20 quality bits (guessed)
Arg/env randomization test (PAGEEXEC)    : 20 quality bits (guessed)
Return to function (strcpy)              : paxtest: return address contains a NULL byte.
Return to function (strcpy, PIE)         : paxtest: return address contains a NULL byte.
Return to function (memcpy)              : Vulnerable
Return to function (memcpy, PIE)         : Vulnerable
Executable shared library bss            : Killed
Executable shared library data           : Killed
Writable text segments                   : Killed

# pwd
/root/paxtest-0.9.15-bsdfix
#
# uname -mrs
OpenBSD 6.0 amd64
#