[PATCH 6.3 195/199] netfilter: nf_tables: drop module reference after updating chain

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>

commit 043d2acf57227db1fdaaa620b2a420acfaa56d6e upstream.

Otherwise the module reference counter is leaked.

Fixes b9703ed44ffb ("netfilter: nf_tables: support for adding new devices to an existing netdev chain")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/netfilter/nf_tables_api.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2664,6 +2664,8 @@ static int nf_tables_updchain(struct nft
 	nft_trans_basechain(trans) = basechain;
 	INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
 	list_splice(&hook.list, &nft_trans_chain_hooks(trans));
+	if (nla[NFTA_CHAIN_HOOK])
+		module_put(hook.type->owner);
 
 	nft_trans_commit_list_add_tail(ctx->net, trans);