kern/51346: rump's module autoload incompatable with paxctl m&a

[paul%whooppee.com@localhost]

>Number:         51346
>Category:       kern
>Synopsis:       rump module auto-load fails with default paxctl settings
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 19 08:20:00 +0000 2016
>Originator:     Paul Goyette
>Release:        NetBSD 7.99.33
>Organization:
+------------------+--------------------------+------------------------+
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:      |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org |
+------------------+--------------------------+------------------------+
>Environment:
	
	
System: NetBSD pokey.whooppee.com 7.99.33 NetBSD 7.99.33 (POKEY 2016-07-04 08:34:20) #0: Mon Jul 4 20:24:24 PHT 2016 paul%pokey.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/POKEY amd64
Architecture: x86_64
Machine: amd64
>Description:
	As shown by the ATF test /usr/tests/rump/modautoload/t_modautoload,
	module autoloading does not work in rump with default paxctl
	settings.

	If you explicitly disable ASLR and MProtect (paxctl +m +a) on the
	test program, it passes every time.  If you only disable MProtect
	(paxctl +m -a), the test will pass some times, and fail others.
	
>How-To-Repeat:
	See above, and play with the paxctl settings on the test program.
	
>Fix:
	Unknown.
	

>Unformatted: