kern/59172: Zebra interface route causes kernel panic for cloned interface

[sp at alkor.ru]

>Number:         59172
>Category:       kern
>Synopsis:       Zebra interface route causes kernel panic for cloned interface
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Nov 11 04:20:13 PST 2003
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        FreeBSD 4.9-STABLE i386
>Organization:
>Environment:
System: FreeBSD rvrng.alkor.ru 4.9-STABLE FreeBSD 4.9-STABLE #4: Tue Nov 11 13:25:14 MSK 2003 sp at rvrng.alkor.ru:/usr/obj/usr/src/sys/GENERIC i386


>Description:

	If you are using zebra with interface route with cloned interface
	you can get kernel panic. Of course this is rare situation, but
	it indicates something wrong in kernel.

>How-To-Repeat:

	/usr/local/etc/zebra/zebra.conf
	--------------------------------
	ip route 0.0.0.0/0 your-gw
	ip route 192.0.2.1/25 vlan10 8
	--------------------------------
	# zebra is running,
	# interface vlan10 does not exists

	ifconfig vlan10 create
	ifconfig vlan10 192.0.2.129/30 vlan 123 vlandev your_ether_if

	The last command causes kernel panic
	current process is indicated as zebra.

>Fix:
	Don't use interface route.

>Release-Note:
>Audit-Trail:
>Unformatted: