From: Mathias Krause <minipli@googlemail.com>
Date: Wed, 19 Sep 2012 11:33:38 +0000 (+0000)
Subject: xfrm_user: fix info leak in copy_to_user_auth()
X-Git-Tag: v3.2.31~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=744e0a9c51333d712e76850bf58b4aeb277016fe;p=pandora-kernel.git

xfrm_user: fix info leak in copy_to_user_auth()

[ Upstream commit 4c87308bdea31a7b4828a51f6156e6f721a1fcc9 ]

copy_to_user_auth() fails to initialize the remainder of alg_name and
therefore discloses up to 54 bytes of heap memory via netlink to
userland.

Use strncpy() instead of strcpy() to fill the trailing bytes of alg_name
with null bytes.

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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