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Date:      Thu, 03 Nov 2016 16:04:50 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-ports-bugs@FreeBSD.org
Subject:   [Bug 213390] dns/unbound: Restart fails when upgrading inside a jail
Message-ID:  <bug-213390-13-Jc06Qy81ZP@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-213390-13@https.bugs.freebsd.org/bugzilla/>
References:  <bug-213390-13@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D213390

--- Comment #2 from Garrett Wollman <wollman@FreeBSD.org> ---
I have figured out the cause of the problem.  unbound always attempts to ch=
root
when starting, but normally succeeds.  When starting inside the environment=
 of
a package upgrade, however, it is erroneously running with a file descriptor
open on a directory.  The check in
`sys/kern/vfs_syscalls.c#chroot_refuse_vdir_fds` then refuses to allow the
chroot to succeed, *if* either `kern.chroot_allow_open_directories` is set =
to
0, or it is set to 1 (which is the default) and is already running in a chr=
oot
(which includes jails).

Conclusion: this is a bug in pkg; the startup scripts should not be run with
any descriptors open other than the standard 0/1/2.

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