tree bf5e774b618ef41b75b83c01e1d120f5c8376c7a
parent 50329c8a340c9dea60d837645fcf13fc36bfb84d
author Mathias Krause <minipli@googlemail.com> 1503760139 +0200
committer Steffen Klassert <steffen.klassert@secunet.com> 1503910682 +0200

xfrm_user: fix info leak in build_expire()

The memory reserved to dump the expired xfrm state includes padding
bytes in struct xfrm_user_expire added by the compiler for alignment. To
prevent the heap info leak, memset(0) the remainder of the struct.
Initializing the whole structure isn't needed as copy_to_user_state()
already takes care of clearing the padding bytes within the 'state'
member.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>