shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-03-26 12:30:23 +09:00
Code Issues Packages Projects Releases Wiki Activity

netfilter: nf_tables: reject unbound chain set before commit phase

Browse Source 
[ Upstream commit 62e1e94b24 ]

Use binding list to track set transaction and to check for unbound
chains before entering the commit phase.

Bail out if chain binding remain unused before entering the commit
step.

Fixes: d0e2c7de92 ("netfilter: nf_tables: add NFT_CHAIN_BINDING")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pablo Neira Ayuso
2023-06-16 15:21:39 +02:00
committed by Greg Kroah-Hartman
parent 2938e7d582
commit 2f2f9eaa6d
1 changed files with 13 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
net/netfilter/nf_tables_api.c
View File

@@ -372,6 +372,11 @@ static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *tr
nft_set_is_anonymous(nft_trans_set(trans)))
list_add_tail(&trans->binding_list, &nft_net->binding_list);
break;
case NFT_MSG_NEWCHAIN:
if (!nft_trans_chain_update(trans) &&
nft_chain_binding(nft_trans_chain(trans)))
list_add_tail(&trans->binding_list, &nft_net->binding_list);
break;
}
list_add_tail(&trans->list, &nft_net->commit_list);
@@ -8908,6 +8913,14 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
return -EINVAL;
}
break;
case NFT_MSG_NEWCHAIN:
if (!nft_trans_chain_update(trans) &&
nft_chain_binding(nft_trans_chain(trans)) &&
!nft_trans_chain_bound(trans)) {
pr_warn_once("nftables ruleset with unbound chain\n");
return -EINVAL;
}
break;
}
}