From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 6 Feb 2009 20:22:18 +1100

Well the data that led to the back trace came from a cmsg, I was
merely pointing out that the cmsg itself is kmalloced and copied
by sys_sendmsg and it's only limited to INT_MAX.

Actually, it's limited to sysctl_optmem_max :-)