kernel: drivers/video/ivtv/ivtvfb.c: reading uninitialized stack memory

The ivtvfbioctl function in drivers/media/video/ivtv/ivtvfb.c in the Linux kernel before 2.6.36-rc8 does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via an FBIOGETVBLANK ioctl call...