[CVE-2011-1093] dccp: fix oops on Reset after close

[Andy Whitcroft]

CVE-2011-1093
	The dccp_rcv_state_process function in net/dccp/input.c in the
	Datagram Congestion Control Protocol (DCCP) implementation in
	the Linux kernel before 2.6.38 does not properly handle packets
	for a CLOSED endpoint, which allows remote attackers to cause a
	denial of service (NULL pointer dereference and OOPS) by sending
	a DCCP-Close packet followed by a DCCP-Reset packet.

The fix for this has hit lucid and later via mainline and stable.
Following this are two patches, the first for hardy, the second for
lucid/fsl-imx51 and maverick/ti-omap4.  I all cases they are a simple
cherry-pick from the mainline commit as applied to the existing branches;
hardy differs in context only.

Proposing for hardy, lucid/fsl-imx51 and maverick/ti-omap4.

-apw