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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-03-23 16:27:16 +0300 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-03-24 21:59:38 +0300 |
| commit | 76a109fac206e158eb3c967af98c178cff738e6a (patch) | |
| tree | 57d6422f0d407591bd88e03171337d460fec9853 /net/netfilter | |
| parent | 7c84d41416d836ef7e533bd4d64ccbdf40c5ac70 (diff) | |
| download | linux-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.c | 9 |
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, }; |