From 7438189baa0a2fe30084bdc97e3d540ebc5444f3 Mon Sep 17 00:00:00 2001
From: Nicolas Dichtel <nicolas.dichtel@dev.6wind.com>
Date: Thu, 25 Mar 2010 23:45:35 +0000
Subject: [PATCH] net: ipmr/ip6mr: prevent out-of-bounds vif_table access

When cache is unresolved, c->mf[6]c_parent is set to 65535 and
minvif, maxvif are not initialized, hence we must avoid to
parse IIF and OIF.
A second problem can happen when the user dumps a cache entry
where a VIF, that was referenced at creation time, has been
removed.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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