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Subject[PATCH 5.4 128/222] netfilter: nft_tunnel: ERSPAN_VERSION must not be null
Date
From: Florian Westphal <fw@strlen.de>

commit 9ec22d7c6c69146180577f3ad5fdf504beeaee62 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/netfilter/nft_tunnel.c | 3 +++
1 file changed, 3 insertions(+)

--- a/net/netfilter/nft_tunnel.c
+++ b/net/netfilter/nft_tunnel.c
@@ -266,6 +266,9 @@ static int nft_tunnel_obj_erspan_init(co
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:

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