From: Girish Moodalbail
Date: Thu, 16 Nov 2017 23:16:17 -0800
> When call to register_netdevice() (called from ipvlan_link_new()) fails,
> we call ipvlan_uninit() (through ndo_uninit()) to destroy the ipvlan
> port. After returning unsuccessfully from register_netdevice() we go
> ahead and call i
When call to register_netdevice() (called from ipvlan_link_new()) fails,
we call ipvlan_uninit() (through ndo_uninit()) to destroy the ipvlan
port. After returning unsuccessfully from register_netdevice() we go
ahead and call ipvlan_port_destroy() again which causes NULL pointer
dereference panic.