assigning an address to ng_fec(4) iface causes panic

>Submitter-Id:	current-users
>Originator:	Evgueni V. Gavrilov
>Organization:	rusunix.org
>Confidential:	no
>Synopsis:	assigning an address to ng_fec(4) iface causes panic
>Severity:	serious
>Priority:	medium
>Category:	kern
>Class:		sw-bug
>Release:	FreeBSD 6.0-BETA3 i386
>Environment:
System: FreeBSD blackbird.opsb 6.0-BETA3 FreeBSD 6.0-BETA2 #0: Sun Aug 22 14:42:49 OMSST 2005     root_at_blackbird.opsb:/usr/obj/usr/src/sys/BLACKBIRD6  i386

>Description:
	assigning an address to ng_fec(4) iface causes panic
	during dumping to dumpdev another panic occurs preventing to identify the source of the first panic and having the crash dump

	ng_iface creation sequence:
	mkpeer fec dummy fec
	msg fec0: add_iface "em0"
	msg fec0: add_iface "em1"
	msg fec0: set_mode_mac

>How-To-Repeat:
	create ng_fec node/iface, assign an address to it
>Fix:
	wish I knew...