K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2021-03-02T15:18:50.975188Z
K 7
svn:log
V 764
arp/nd: Cope with late calls to iflladdr_event

When tearing down vnet jails we can move an if_bridge out (as
part of the normal vnet_if_return()). This can, when it's clearing out
its list of member interfaces, change its link layer address.
That sends an iflladdr_event, but at that point we've already freed the
AF_INET/AF_INET6 if_afdata pointers.

In other words: when the iflladdr_event callbacks fire we can't assume
that ifp->if_afdata[AF_INET] will be set.

Reviewed by:	donner@, melifaro@
MFC after:	1 week
Sponsored by:	Orange Business Services
Differential Revision:	https://reviews.freebsd.org/D28860

(cherry picked from commit c139b3c19b52abe3b5ba23a8175e58e70c7a528d)

Git Hash:   a285c84d517f4b987dfbbcec876d1fd812065a27
Git Author: kp@FreeBSD.org
END