Kernel: information leak in fs/compat_ioctl.c VIDEO_SET_SPU_PALETTE

The dovideosetspupalette function in fs/compatioctl.c in the Linux kernel before 3.6.5 on unspecified architectures lacks a certain error check, which might allow local users to obtain sensitive information from kernel stack memory via a crafted VIDEOSETSPUPALETTE ioctl call on a /dev/dvb device...