From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 23 Feb 2012 10:55:02 +0000 (+0000)
Subject: ipsec: be careful of non existing mac headers
X-Git-Tag: v3.2.12~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b86e173ed3f6e5f9a37215449c0cb1167d13d490;p=pandora-kernel.git

ipsec: be careful of non existing mac headers

[ Upstream commit 03606895cd98c0a628b17324fd7b5ff15db7e3cd ]

Niccolo Belli reported ipsec crashes in case we handle a frame without
mac header (atm in his case)

Before copying mac header, better make sure it is present.

Bugzilla reference:  https://bugzilla.kernel.org/show_bug.cgi?id=42809

Reported-by: Niccolò Belli <darkbasic@linuxsystems.it>
Tested-by: Niccolò Belli <darkbasic@linuxsystems.it>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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