tree 9ff6f97f0f7042d56a0388673afd344390d28de7
parent 3a6b11559f2e70b070e7e2aa84b9c46c25749bea
author Andy Whitcroft <apw@canonical.com> 1490255144 +0000
committer edwardcw_lin <Edwardcw_Lin@compal.com> 1493178684 +0800

xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder

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>

Change-Id: I5e82169063dadb1577f81da0a4e750d11b6aa045