6PE mapped addresses used for ICMPv6 responses - knob to fix that?

[Jeroen Massar]

In relation to the fd00::/8 thread, it seems the bug with respect to 6PE
is not resolved yet.

That is, if you have 6PE (IPv4 LSP) in your network routers might send
an ICMPv6 message from the IPv6-Mapped-IPv4 address.

And as :::ffff:0.0.0.0/96 should not be in anybody's BGP table, it will
fail uRPF.

Is anybody aware of a knob that can force for instance the loopback
address to be used on these boxes?

Greets,
 Jeroen