On Mon, 28 Jul 2003 17:18:49 +0200
Jan Oravec [off-list ref] wrote:

while trying to setup IPv6-capable bind DNS server on UltraSparc II box,
i have found the following problem:

Yes, this is an unfortunate consequence of how we emulate
socket CMSGs in 32-bit applications running on a 64-bit
kernel in 2.4.x

It is not easily fixable in 2.4.x, in fact it would be such
an intrusive and bug-prone change that I'm probably not going
to fix it in 2.4.x

The workaround in the app is the use slightly larger than
necessary CMSG buffers.  Sorry :(

2.5.x/2.6.x does things properly and the bug shouldn't show up
there.