Re: [PATCH net v2] net: vlan: fix a UAF in vlan_dev_real_dev()

Ziyang Xuan (William) [off-list ref] writes:

I need some time to test my some ideas. And anyone has good ideas, please
do not be stingy.

Jakub Kicinski [off-list ref] writes:

I think we should move the dev_hold() to ndo_init(), otherwise it's
hard to reason if destructor was invoked or not if
register_netdevice() errors out.

That makes sense to me. We always put real_dev in the destructor, so we
should always hold it in the constructor...