[Bug 194233] New: sysctl -a shouldn't be listing kern.msgbuf

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194233

            Bug ID: 194233
           Summary: sysctl -a shouldn't be listing kern.msgbuf
           Product: Base System
           Version: 10.0-RELEASE
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: wkoszek at freebsd.czest.pl

I use FreeBSD 10.0 release. For reviewing sysctl settings I typically use:

sysctl -a

It always showed the presence of ``kern.msgbuf'', but it never listed its
content. I verified with 9.1-STABLE.

In FreeBSD 10 kern.msgbuf's content is shown. As a result of showing some
garbage from prior invocations of ncurses-based programs sysctl -a causes my
console to get stuck.

I must do 'reset' to unstuck it.

I think kern.msgbuf should be hidden from sysctl -a.

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