[Bug 222647] VIMAGE jail: ifa_maintain_loopback_route: deletion failed for interface lo0: 48

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222647

            Bug ID: 222647
           Summary: VIMAGE jail: ifa_maintain_loopback_route: deletion
                    failed for interface lo0: 48
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: marieheleneka at gmail.com

When stopping a VIMAGE jail, the message "ifa_maintain_loopback_route: deletion
failed for interface lo0: 48" appears in the output of dmesg. The message
appears only for lo0, even when several interfaces are present in the VIMAGE
jail.

The following jail.conf reproduces the error message.

exec.start              = "/bin/sh /etc/rc";
exec.stop               = "/bin/sh /etc/rc.shutdown";
exec.clean;
mount.devfs;
path                    = "/usr/jails/$name";

devsamba {
  vnet;
}

There does not appear to be any adverse effects of this error, but I figure it
might be a symptom of a more fundamental/severe bug.

#uname -a
FreeBSD venus 12.0-CURRENT FreeBSD 12.0-CURRENT #18 r323223M: Sun Sep 10
16:41:41 CEST 2017     root at venus:/usr/obj/usr/src/sys/Venus  amd64


# cat /usr/src/sys/amd64/conf/Venus
include GENERIC
ident Venus
options VIMAGE
device epair

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