Comment 1 for bug 1578702

An update on this:

CRIU uses `ip addr save` and `ip addr restore` to save and restore ip addresses for interfaces after it has created the interfaces themselves. `ip addr save` definitely saves ipv6 addresses in the cases where this fails, but `ip addr restore` does not restore them.

I patched iproute2, and it seems like it is indeed sending the correct messages (with NLM_F_ACK, no less), and the kernel is just dropping them on the floor and not responding with an error. I'm working on figuring out why this is, but at least for now it's not obvious :)