This is a note to let you know that I've just added the patch titled
netfilter: nf_tables: disallow binding to already bound chain
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
netfilter-nf_tables-disallow-binding-to-already-boun.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6108e026195c0e56f21a24c50a640cb16224620f
Author: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Date: Mon Aug 22 11:06:39 2022 +0200
netfilter: nf_tables: disallow binding to already bound chain
[ Upstream commit e02f0d3970404bfea385b6edb86f2d936db0ea2b ]
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@xxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 8bc4460b627ae..d8ca55d6be409 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -9505,6 +9505,8 @@ 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;
