Comment 7 for bug 1623068

Does that kernel support IPv6, i. e. does socket_ipv6_is_supported() succeed and the whole AF_INET6 setup is actually done?

I. e. is the problem the mere existence of the IFLA_AF_SPEC container in the netlink message (which already isn't supported by the kernel) or only trying to set the IPv6 settings?

I. e. it might help to not create the container at all if !socket_ipv6_is_supported(), i. e. move the open/close_container() inside that if()? (that would only help if the kernel has IPv6 disabled)