From: Vasiliy Kulikov <segooon@gmail.com>
Date: Wed, 10 Nov 2010 20:09:10 +0000 (-0800)
Subject: net: packet: fix information leak to userland
X-Git-Tag: v2.6.37-rc2~20^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=67286640f638f5ad41a946b9a3dc75327950248f;p=pandora-kernel.git

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>
---

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