pptp: fix stack info leak in pptp_getname()
pptp_getname() only partially initializes the stack variable sa, particularly only fills the pptp part of the sa_addr union. The code thereby discloses 16 bytes of kernel stack memory via getsockname(). Fix this by memset(0)'ing the union before. Cc: Dmitry Kozlov <xeb@mail.ru> Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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