[CVE-2011-1477] MIDI sequencer overruns

[Andy Whitcroft]

CVE-2011-1477
	Due to a failure to validate user-supplied indexes in the driver
	for Yamaha YM3812 and OPL-3 chips, a specially crafted ioctl
	request may be sent to /dev/sequencer, resulting in reading
	and writing beyond the bounds of heap buffers, and potentially
	allowing privilege escalation.

Fixes for this issue have hit lucid and later via mainline and stable.
Following this email is a fix for hardy and maverick/ti-omap4, this is a
simple cherry-pick of the mainline fix.

It should be noted that we do not have OSS enabled in later releases but
people do use our source to make their own kernels so I am proposing we
apply it to the one missed release.  It is arguable we should not bother
applying this maverick/ti-omap4.

Proposing for hardy and maverick/ti-omap4.

-apw