structure pads can leak uninitialized memory to userland via copyout,

structure pads can leak uninitialized memory to userland via copyout,
therefore the mandatory idiom is completely clearing structs before
building them for copyout -- that means ALMOST ALL STRUCTS, because
we never know when some architecture will pad a struct..  In two more
cases, the clearing wasn't performed.
from Reno Robert ZDI
ok millert bluhm