[CVE-2010-4157] gdth: integer overflow in ioctl

[Stefan Bader]

On 02/02/2011 01:27 PM, Andy Whitcroft wrote:
> CVE-2010-4157
> 
> 	Integer overflow in the ioc_general function in drivers/scsi/gdth.c
> 	in the Linux kernel before 2.6.36.1 on 64-bit platforms allows
> 	local users to cause a denial of service (memory corruption)
> 	or possibly have unspecified other impact via a large argument
> 	in an ioctl call.
> 
> This was fixed before Natty opened, and has already hit Maverick and
> Lucid via the upstream stable process.  The upstream fix cherry-picks
> back to Karmic and Hardy unchanged.  I have backported this fix to
> Dapper as well; including checks for additional parameters from
> userspace (which are validated in other ways in Hardy and later).
> 
> Two patches follow, one for Dapper, and a second for Hardy and Karmic.
> 
> -apw
> 
Looks ok

Acked-by: Stefan Bader <stefan.bader at canonical.com>