From: Andy Whitcroft <apw@canonical.com>
Date: Thu, 23 Mar 2017 07:45:44 +0000 (+0000)
Subject: xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder
X-Git-Tag: v3.2.89~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d09fd3505c59374e599a29918ca40059be3d554;p=pandora-kernel.git

xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder

commit f843ee6dd019bcece3e74e76ad9df0155655d0df upstream.

Kees Cook has pointed out that xfrm_replay_state_esn_len() is subject to
wrapping issues.  To ensure we are correctly ensuring that the two ESN
structures are the same size compare both the overall size as reported
by xfrm_replay_state_esn_len() and the internal length are the same.

CVE-2017-7184
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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