netfilter: nft_tunnel: ERSPAN_VERSION must not be null
authorFlorian Westphal <fw@strlen.de>
Thu, 16 Jan 2020 07:58:05 +0000 (08:58 +0100)
committerPablo Neira Ayuso <pablo@netfilter.org>
Thu, 16 Jan 2020 13:22:32 +0000 (14:22 +0100)
Fixes: af308b94a2a4a5 ("netfilter: nf_tables: add tunnel support")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
net/netfilter/nft_tunnel.c

index d89c7c5..5284fcf 100644 (file)
@@ -266,6 +266,9 @@ static int nft_tunnel_obj_erspan_init(const struct nlattr *attr,
        if (err < 0)
                return err;
 
+       if (!tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION])
+                return -EINVAL;
+
        version = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION]));
        switch (version) {
        case ERSPAN_VERSION: