netfilter: nft_hash: fix nft_hash_deactivate

[ backport for 4.14 of 7f4dae2d ]

Jindřich Makovička says:
  The logical OR looks fishy to me. Shouldn't be && there instead?

Link: https://bugzilla.netfilter.org/show_bug.cgi?id=1199


Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

net/netfilter/nft_set_hash.c

@@ -520,7 +520,7 @@ static void *nft_hash_deactivate(const struct net *net,
 	hash = nft_jhash(set, priv, &this->ext);
 	hlist_for_each_entry(he, &priv->table[hash], node) {
 		if (!memcmp(nft_set_ext_key(&this->ext), &elem->key.val,
-			    set->klen) ||
+			    set->klen) &&
 		    nft_set_elem_active(&he->ext, genmask)) {
 			nft_set_elem_change_active(net, set, &he->ext);
 			return he;