David Miller wrote:

From: Vlad Yasevich <redacted>
Date: Mon, 28 Jul 2008 14:09:55 -0400

quoted

The IPv6 checks are much different.  The MUST requirement is to provide as much
data as possible upto IPv6 min mtu.  So, the IPv6 icmp code should probably look
to see if min(payload_len, min_mtu) is provided.

"Be liberal in what you accept..." -Jon Postel

Yeah, that check is really too strict.

Also, do you know any case where 576 bytes won't provide enough
quoted packet bytes? :-)

Yes, I've seen a case where a full 1280 was needed.  It involved a
very convoluted packet that had extension headers and then went
through 2 encapsulations.  This was an extreme test scenario and
not a real world example.

-vlad