From: Mathias Krause <minipli@googlemail.com>
Date: Sat, 9 Mar 2013 05:52:20 +0000 (+0000)
Subject: rtnl: fix info leak on RTM_GETLINK request for VF  devices
X-Git-Tag: v3.2.42~78
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ed5a1be59dc5c54b33581031584e9bd35a3a3ab;p=pandora-kernel.git

rtnl: fix info leak on RTM_GETLINK request for VF  devices

[ Upstream commit 84d73cd3fb142bf1298a8c13fd4ca50fd2432372 ]

Initialize the mac address buffer with 0 as the driver specific function
will probably not fill the whole buffer. In fact, all in-kernel drivers
fill only ETH_ALEN of the MAX_ADDR_LEN bytes, i.e. 6 of the 32 possible
bytes. Therefore we currently leak 26 bytes of stack memory to userland
via the netlink interface.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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