K 10
svn:author
V 3
erj
K 8
svn:date
V 27
2019-10-23T23:20:49.630832Z
K 7
svn:log
V 711
iflib: call ether_ifdetach and netmap_detach before stop

From Jake:
Calling ether_ifdetach after iflib_stop leads to a potential race where
a stale ifp pointer can remain in the route entry list for IPv6 traffic.
This will potentially cause a page fault or other system instability if
the ifp pointer is accessed.

Move both iflib_netmap_detach and ether_ifdetach to be called prior to
iflib_stop. This avoids the race above, and helps ensure that other ifp
references are removed before stopping the interface.

Submitted by:	Jacob Keller <jacob.e.keller@intel.com>
Reviewed by:	erj@, gallatin@, jhb@
MFC after:	3 days
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D22071

END