1 files changed, 15 insertions, 17 deletions

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 21b6f7410a1f..0b9f1e8dfe49 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -1596,7 +1596,6 @@ static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
 	INIT_LIST_HEAD(&table->sets);
 	INIT_LIST_HEAD(&table->objects);
 	INIT_LIST_HEAD(&table->flowtables);
-	write_pnet(&table->net, net);
 	table->family = family;
 	table->flags = flags;
 	table->handle = ++nft_net->table_handle;
@@ -3987,8 +3986,11 @@ void nf_tables_rule_destroy(const struct nft_ctx *ctx, struct nft_rule *rule)
 	kfree(rule);
 }
 
+/* can only be used if rule is no longer visible to dumps */
 static void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
 {
+	lockdep_commit_lock_is_held(ctx->net);
+
 	nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
 	nf_tables_rule_destroy(ctx, rule);
 }
@@ -5757,6 +5759,8 @@ void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
 			      struct nft_set_binding *binding,
 			      enum nft_trans_phase phase)
 {
+	lockdep_commit_lock_is_held(ctx->net);
+
 	switch (phase) {
 	case NFT_TRANS_PREPARE_ERROR:
 		nft_set_trans_unbind(ctx, set);
@@ -11695,19 +11699,6 @@ static void __nft_release_basechain_now(struct nft_ctx *ctx)
 	nf_tables_chain_destroy(ctx->chain);
 }
 
-static void nft_release_basechain_rcu(struct rcu_head *head)
-{
-	struct nft_chain *chain = container_of(head, struct nft_chain, rcu_head);
-	struct nft_ctx ctx = {
-		.family	= chain->table->family,
-		.chain	= chain,
-		.net	= read_pnet(&chain->table->net),
-	};
-
-	__nft_release_basechain_now(&ctx);
-	put_net(ctx.net);
-}
-
 int __nft_release_basechain(struct nft_ctx *ctx)
 {
 	struct nft_rule *rule;
@@ -11722,11 +11713,18 @@ int __nft_release_basechain(struct nft_ctx *ctx)
 	nft_chain_del(ctx->chain);
 	nft_use_dec(&ctx->table->use);
 
-	if (maybe_get_net(ctx->net))
-		call_rcu(&ctx->chain->rcu_head, nft_release_basechain_rcu);
-	else
+	if (!maybe_get_net(ctx->net)) {
 		__nft_release_basechain_now(ctx);
+		return 0;
+	}
+
+	/* wait for ruleset dumps to complete.  Owning chain is no longer in
+	 * lists, so new dumps can't find any of these rules anymore.
+	 */
+	synchronize_rcu();
 
+	__nft_release_basechain_now(ctx);
+	put_net(ctx->net);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(__nft_release_basechain);