Hi, I'm not subscribed to the Linux netdev mailing list, so I can't directly reply to the patch email.
This patch is not the correct solution to this issue. Per RFC 4291 "IP Version 6 Addressing Architecture", all IPv6 interfaces are required to have Link-Local addresses, so therefore there should always be a link-local address available to use as the source address for an ND NS. "2.1. Addressing Model" ... "All interfaces are required to have at least one Link-Local unicast address (see Section 2.8 for additional required addresses)." I have submitted a more specific bug regarding no Link-Local address/prefix on the Linux kernel loopback interface through RedHat bugzilla as I use Fedora 30, however it doesn't seem to have been looked at yet. "Loopback network interface does not have a Link Local address, contrary to RFC 4291" https://bugzilla.redhat.com/show_bug.cgi?id=1706709 Thanks very much, Mark.
