diff mbox series

[net,11/14] netfilter: nf_tables: disallow binding to already bound chain

Message ID 20220824220330.64283-12-pablo@netfilter.org
State Accepted
Delegated to: Pablo Neira
Headers show
Series [net,01/14] netfilter: ebtables: reject blobs that don't provide all entry points | expand

Commit Message

Pablo Neira Ayuso Aug. 24, 2022, 10:03 p.m. UTC 
Update nft_data_init() to report EINVAL if chain is already bound.

Fixes: d0e2c7de92c7 ("netfilter: nf_tables: add NFT_CHAIN_BINDING")
Reported-by: Gwangun Jung <exsociety@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 72c066a33416..2ee50e23c9b7 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -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;