This is a note to let you know that I've just added the patch titled
netfilter: nf_tables: discard table flag update with pending basechain deletion
to the 6.1-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-discard-table-flag-update-with-p.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e79c94c47faaf57868b8fa7359b491a0d7d55218
Author: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Date: Mon Apr 8 23:18:34 2024 +0200
netfilter: nf_tables: discard table flag update with pending basechain deletion
commit 1bc83a019bbe268be3526406245ec28c2458a518 upstream.
Hook unregistration is deferred to the commit phase, same occurs with
hook updates triggered by the table dormant flag. When both commands are
combined, this results in deleting a basechain while leaving its hook
still registered in the core.
Fixes: 179d9ba5559a ("netfilter: nf_tables: fix table flag updates")
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 e7b31c2c92df2..8152a69d82681 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -1192,6 +1192,24 @@ static void nf_tables_table_disable(struct net *net, struct nft_table *table)
#define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
__NFT_TABLE_F_WAS_AWAKEN)
+static bool nft_table_pending_update(const struct nft_ctx *ctx)
+{
+ struct nftables_pernet *nft_net = nft_pernet(ctx->net);
+ struct nft_trans *trans;
+
+ if (ctx->table->flags & __NFT_TABLE_F_UPDATE)
+ return true;
+
+ list_for_each_entry(trans, &nft_net->commit_list, list) {
+ if (trans->ctx.table == ctx->table &&
+ trans->msg_type == NFT_MSG_DELCHAIN &&
+ nft_is_base_chain(trans->ctx.chain))
+ return true;
+ }
+
+ return false;
+}
+
static int nf_tables_updtable(struct nft_ctx *ctx)
{
struct nft_trans *trans;
@@ -1215,7 +1233,7 @@ static int nf_tables_updtable(struct nft_ctx *ctx)
return -EOPNOTSUPP;
/* No dormant off/on/off/on games in single transaction */
- if (ctx->table->flags & __NFT_TABLE_F_UPDATE)
+ if (nft_table_pending_update(ctx))
return -EINVAL;
trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
