[NETFILTER] ctnetlink: Fix refcount leak ip_conntrack/nat_proto
Remove proto == NULL checking since ip_conntrack_[nat_]proto_find_get always returns a valid pointer. Fix missing ip_conntrack_proto_put in some paths. Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: NHarald Welte <laforge@netfilter.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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