netfilter: nft_tunnel: ERSPAN_VERSION must not be null
[ Upstream commit 9ec22d7c6c69146180577f3ad5fdf504beeaee62 ]
Fixes: af308b94a2
("netfilter: nf_tables: add tunnel support")
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>
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@ -235,6 +235,9 @@ static int nft_tunnel_obj_erspan_init(const struct nlattr *attr,
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if (err < 0)
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return err;
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if (!tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION])
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return -EINVAL;
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version = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION]));
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switch (version) {
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case ERSPAN_VERSION:
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