kernel: wireless: fix 64K kernel heap content leak via ioctl

The cfg80211wextgiwessid function in net/wireless/wext-compat.c in the Linux kernel before 2.6.36-rc3-next-20100831 does not properly initialize certain structure members, which allows local users to leverage an off-by-one error in the ioctlstandardiwpoint function in net/wireless/wext-core.c, an...