kern/52947: panic: kernel diagnostic assertion "mutex_owned(softnet_lock)" failed: file /usr/src/sys/netinet6/nd6_rtr.c", line 2223

[kardel%netbsd.org@localhost]

>Number:         52947
>Category:       kern
>Synopsis:       panic: kernel diagnostic assertion "mutex_owned(softnet_lock)" failed: file /usr/src/sys/netinet6/nd6_rtr.c", line 2223
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 24 18:35:00 +0000 2018
>Originator:     Frank Kardel
>Release:        NetBSD 8.99.12
>Organization:
	
>Environment:
	
	
System: NetBSD pip.kardel.name 8.99.12 NetBSD 8.99.12 (PIPGEN) #2: Tue Jan 23 23:25:08 CET 2018 kardel@pip:/usr/src/obj.amd64/sys/arch/amd64/compile/PIPGEN amd64
Architecture: x86_64
Machine: amd64
>Description:
	During shutdown with IPv6 configured vlan0 interface the assertion is triggered.
	Hand copied stacktrace
	nd6_rt_flush()
	nd6_defrtrlist_del()
	nd6_purge()
	in6_ifdetach()
	vlan_unconfig_locked()
	vlan_ifdetach()
	ether_ifdetach()
	wm_detach()
	config_detach()
	config_detach_all()
	cpu_reboot()
	sys_reboot()
	syscall()

>How-To-Repeat:
	Configure a vlan interface with IPv6 addresses on vlanX with wmX as parent.
	Perform shutdown -> panic on non NET_MPSAFE kernel.
>Fix:
	n/a

>Unformatted: