[CVE-2014-2851] Integer overflow in the ping_init_sock function

[Andy Whitcroft]

CVE-2014-2851
	Integer overflow in the ping_init_sock function in net/ipv4/ping.c
	in the Linux kernel through 3.14.1 allows local users to cause a
	denial of service (use-after-free and system crash) or possibly
	gain privileges via a crafted application that leverages an
	improperly managed reference counter.

Following this email are 4 patches for precise, quantal,
lts-backport-raring, and saucy/trusty.  Utopic is already fixed via
upstream.

The patches for lts-backport-raring and saucy/trusty are simple
cherry-picks though they do differ in context.  The other two are simple
backports over some namespace uid/gid handling changes.

These have been build tested.

Proposing SRU to precise, quantal, precise/lts-backport-raring, saucy, and
trusty.

-apw