Commit e02f0d39 authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso
Browse files

netfilter: nf_tables: disallow binding to already bound chain 



Update nft_data_init() to report EINVAL if chain is already bound.

Fixes: d0e2c7de ("netfilter: nf_tables: add NFT_CHAIN_BINDING")
Reported-by: default avatarGwangun Jung <exsociety@gmail.com>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent 01e4092d

net/netfilter/nf_tables_api.c

+2 −0
Original line number Diff line number Diff line
@@ -9711,6 +9711,8 @@ static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data, 
			return PTR_ERR(chain);

		if (nft_is_base_chain(chain))

			return -EOPNOTSUPP;

		if (nft_chain_is_bound(chain))

			return -EINVAL;

		if (desc->flags & NFT_DATA_DESC_SETELEM &&

		    chain->flags & NFT_CHAIN_BINDING)

			return -EINVAL;