K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2019-03-15T13:19:52.414989Z
K 7
svn:log
V 726
if_bridge(4): Fix module teardown

bridge_rtnode_zone still has outstanding allocations at the time of
destruction in the current model because all of the interface teardown
happens in a VNET_SYSUNINIT, -after- the MOD_UNLOAD has already been
processed.  The SYSUNINIT triggers destruction of the interfaces, which then
attempts to free the memory from the zone that's already been destroyed, and
we hit a panic.

Solve this by virtualizing the uma_zone we allocate the rtnodes from to fix
the ordering. bridge_rtable_fini should also take care to flush any
remaining routes that weren't taken care of when dynamic routes were flushed
in bridge_stop.

Reviewed by:	kp
Differential Revision:	https://reviews.freebsd.org/D19578

END