Re: reproducible kernel crash in NetBSD 7.1_RC1

[christos%astron.com@localhost (Christos Zoulas)]

In article <Pine.NEB.4.64.1701231124030.22851%6bone.informatik.uni-leipzig.de@localhost>,
 <6bone%6bone.informatik.uni-leipzig.de@localhost> wrote:
>Hello,
>
>on NetBSD 7.1_RC1 (and earlier) I can create a kernel crash as follows:
>
>ifconfig ixg0 ip4csum tcp4csum udp4csum tcp6csum udp6csum ip4csum-tx
>ip4csum-rx tcp4csum-tx tcp4csum-rx udp4csum-tx udp4csum-rx tcp6csum-tx
>tcp6csum-rx udp6csum-tx udp6csum-rx tso4 tso6
>ifconfig vlan850 create
>ifconfig vlan850 vlan 850 vlanif ixg0 up
>ifconfig vlan850 ip4csum tcp4csum udp4csum tcp6csum udp6csum ip4csum-tx
>ip4csum-rx tcp4csum-tx tcp4csum-rx udp4csum-tx udp4csum-rx tcp6csum-tx
>tcp6csum-rx udp6csum-tx udp6csum-rx tso4 tso6
>ifconfig vlan850 destroy
>
>If it does not work, try again.
>
>Can anyone take a look at the problem or should I make a bug report?
>
>Thank you for your efforts

I think that the vlan creation/removal code is racy even under /current.
There was some discussion recently about it.

christos