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-rw-r--r--net/netfilter/nf_tables_api.c13
-rw-r--r--net/netfilter/nft_chain_filter.c5
2 files changed, 15 insertions, 3 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index ae312b31db28..d23a5c269c44 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -5837,18 +5837,23 @@ static int nf_tables_flowtable_event(struct notifier_block *this,
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct nft_flowtable *flowtable;
struct nft_table *table;
+ struct net *net;
if (event != NETDEV_UNREGISTER)
return 0;
+ net = maybe_get_net(dev_net(dev));
+ if (!net)
+ return 0;
+
nfnl_lock(NFNL_SUBSYS_NFTABLES);
- list_for_each_entry(table, &dev_net(dev)->nft.tables, list) {
+ list_for_each_entry(table, &net->nft.tables, list) {
list_for_each_entry(flowtable, &table->flowtables, list) {
nft_flowtable_event(event, dev, flowtable);
}
}
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
-
+ put_net(net);
return NOTIFY_DONE;
}
@@ -7154,9 +7159,11 @@ static int __net_init nf_tables_init_net(struct net *net)
static void __net_exit nf_tables_exit_net(struct net *net)
{
+ nfnl_lock(NFNL_SUBSYS_NFTABLES);
if (!list_empty(&net->nft.commit_list))
__nf_tables_abort(net);
__nft_release_tables(net);
+ nfnl_unlock(NFNL_SUBSYS_NFTABLES);
WARN_ON_ONCE(!list_empty(&net->nft.tables));
}
@@ -7201,11 +7208,11 @@ static void __exit nf_tables_module_exit(void)
{
nfnetlink_subsys_unregister(&nf_tables_subsys);
unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
+ nft_chain_filter_fini();
unregister_pernet_subsys(&nf_tables_net_ops);
rcu_barrier();
nf_tables_core_module_exit();
kfree(info);
- nft_chain_filter_fini();
}
module_init(nf_tables_module_init);
diff --git a/net/netfilter/nft_chain_filter.c b/net/netfilter/nft_chain_filter.c
index 84c902477a91..d21834bed805 100644
--- a/net/netfilter/nft_chain_filter.c
+++ b/net/netfilter/nft_chain_filter.c
@@ -318,6 +318,10 @@ static int nf_tables_netdev_event(struct notifier_block *this,
event != NETDEV_CHANGENAME)
return NOTIFY_DONE;
+ ctx.net = maybe_get_net(ctx.net);
+ if (!ctx.net)
+ return NOTIFY_DONE;
+
nfnl_lock(NFNL_SUBSYS_NFTABLES);
list_for_each_entry(table, &ctx.net->nft.tables, list) {
if (table->family != NFPROTO_NETDEV)
@@ -334,6 +338,7 @@ static int nf_tables_netdev_event(struct notifier_block *this,
}
}
nfnl_unlock(NFNL_SUBSYS_NFTABLES);
+ put_net(ctx.net);
return NOTIFY_DONE;
}