From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 6 Feb 2009 19:54:06 +1100

This should eliminate the backtrace as reported, but it'll just
show up somewhere else.  In particular, the control message (see
sys_sendmsg) itself is copied to kernel memory via kmalloc and
it's limited to INT_MAX :)

Can you be more specific, do you mean this is happening
via datagram_send_ctl()?

If we limit how big these txoption blobs can be, at all
sites where we parse instances the user gives us, I can't
see any such problems.