From: Mathias Krause <minipli@googlemail.com>
Date: Wed, 19 Sep 2012 11:33:40 +0000 (+0000)
Subject: xfrm_user: fix info leak in copy_to_user_policy()
X-Git-Tag: v3.2.31~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc39fa8d3deb34d5d0cfd86aafb8033ac4a4ed90;p=pandora-kernel.git

xfrm_user: fix info leak in copy_to_user_policy()

[ Upstream commit 7b789836f434c87168eab067cfbed1ec4783dffd ]

The memory reserved to dump the xfrm policy includes multiple padding
bytes added by the compiler for alignment (padding bytes in struct
xfrm_selector and struct xfrm_userpolicy_info). Add an explicit
memset(0) before filling the buffer to avoid the heap info leak.

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