tree 34844d5e00a54f78b384f75f6cded995423d7fc6
parent 57fe93b374a6b8711995c2d466c502af9f3a08bb
author Vasiliy Kulikov <segooon@gmail.com> 1289419750 -0800
committer David S. Miller <davem@davemloft.net> 1289419750 -0800

net: packet: fix information leak to userland

packet_getname_spkt() doesn't initialize all members of sa_data field of
sockaddr struct if strlen(dev->name) < 13.  This structure is then copied
to userland.  It leads to leaking of contents of kernel stack memory.
We have to fully fill sa_data with strncpy() instead of strlcpy().

The same with packet_getname(): it doesn't initialize sll_pkttype field of
sockaddr_ll.  Set it to zero.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>