[CVE-2011-2909] comedi information leak

[Andy Whitcroft]

CVE-2011-2909
	Vasiliy Kulikov of Openwall discovered that a programming error
	in the Comedi driver could lead to the information disclosure
	through leaked stack memory.

Fixes for this have reached lucid and oneiric via mainline and stable.
Hardy does not have this driver.  Following this email is a patch for
lucid/fsl-imx51, maverick, maverick/ti-omap4, natty, and natty/ti-omap4.
This is a direct cherry-pick from mainline.

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

-apw