diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-07-04 02:51:28 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-07-04 02:51:28 +0200 |
| commit | c1f79a2eefdcc0aef5d7a911c27a3f75f1936ecd (patch) | |
| tree | b734a2cd2ed9ee3f00f7a7921ff49425b42e2a71 | |
| parent | d0e2c7de92c7f2b3d355ad76b0bb9fc43d1beb87 (diff) | |
netfilter: nf_tables: reject unsupported chain flags
Bail out if userspace sends unsupported chain flags.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 3 | ||||
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index e00b4ae6174e..42f351c1f5c5 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -189,6 +189,9 @@ enum nft_chain_flags { NFT_CHAIN_HW_OFFLOAD = (1 << 1), NFT_CHAIN_BINDING = (1 << 2), }; +#define NFT_CHAIN_FLAGS (NFT_CHAIN_BASE | \ + NFT_CHAIN_HW_OFFLOAD | \ + NFT_CHAIN_BINDING) /** * enum nft_chain_attributes - nf_tables chain netlink attributes diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index b8a970dad213..f96785586f64 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -2285,6 +2285,9 @@ static int nf_tables_newchain(struct net *net, struct sock *nlsk, else if (chain) flags = chain->flags; + if (flags & ~NFT_CHAIN_FLAGS) + return -EOPNOTSUPP; + nft_ctx_init(&ctx, net, skb, nlh, family, table, chain, nla); if (chain != NULL) { |