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authorPablo Neira Ayuso <pablo@netfilter.org>2020-03-23 16:27:16 +0300
committerPablo Neira Ayuso <pablo@netfilter.org>2020-03-24 21:59:38 +0300
commit76a109fac206e158eb3c967af98c178cff738e6a (patch)
tree57d6422f0d407591bd88e03171337d460fec9853 /net/netfilter
parent7c84d41416d836ef7e533bd4d64ccbdf40c5ac70 (diff)
downloadlinux-76a109fac206e158eb3c967af98c178cff738e6a.tar.xz
netfilter: nft_fwd_netdev: validate family and chain type
Make sure the forward action is only used from ingress. Fixes: 39e6dea28adc ("netfilter: nf_tables: add forward expression to the netdev family") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
-rw-r--r--net/netfilter/nft_fwd_netdev.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/net/netfilter/nft_fwd_netdev.c b/net/netfilter/nft_fwd_netdev.c
index aba11c2333f3..ddd28de810b6 100644
--- a/net/netfilter/nft_fwd_netdev.c
+++ b/net/netfilter/nft_fwd_netdev.c
@@ -190,6 +190,13 @@ nla_put_failure:
return -1;
}
+static int nft_fwd_validate(const struct nft_ctx *ctx,
+ const struct nft_expr *expr,
+ const struct nft_data **data)
+{
+ return nft_chain_validate_hooks(ctx->chain, (1 << NF_NETDEV_INGRESS));
+}
+
static struct nft_expr_type nft_fwd_netdev_type;
static const struct nft_expr_ops nft_fwd_neigh_netdev_ops = {
.type = &nft_fwd_netdev_type,
@@ -197,6 +204,7 @@ static const struct nft_expr_ops nft_fwd_neigh_netdev_ops = {
.eval = nft_fwd_neigh_eval,
.init = nft_fwd_neigh_init,
.dump = nft_fwd_neigh_dump,
+ .validate = nft_fwd_validate,
};
static const struct nft_expr_ops nft_fwd_netdev_ops = {
@@ -205,6 +213,7 @@ static const struct nft_expr_ops nft_fwd_netdev_ops = {
.eval = nft_fwd_netdev_eval,
.init = nft_fwd_netdev_init,
.dump = nft_fwd_netdev_dump,
+ .validate = nft_fwd_validate,
.offload = nft_fwd_netdev_offload,
};