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netfilter: nft_chain_filter: handle NETDEV_UNREGISTER for inet/ingress basechain

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commit 01acb2e8666a6529697141a6017edbf206921913 upstream.

Remove netdevice from inet/ingress basechain in case NETDEV_UNREGISTER
event is reported, otherwise a stale reference to netdevice remains in
the hook list.

Fixes: 60a3815da7 ("netfilter: add inet ingress support")
Cc: stable@vger.kernel.org
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pablo Neira Ayuso 2024-01-18 10:56:26 +01:00 committed by Greg Kroah-Hartman
parent 5e7d8ddf2a
commit af149a4689
1 changed files with 9 additions and 2 deletions
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11
net/netfilter/nft_chain_filter.c
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@ -357,9 +357,10 @@ static int nf_tables_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct nft_base_chain *basechain;
struct nftables_pernet *nft_net;
struct nft_table *table;
struct nft_chain *chain, *nr;
struct nft_table *table;
struct nft_ctx ctx = {
.net = dev_net(dev),
};
@ -371,7 +372,8 @@ static int nf_tables_netdev_event(struct notifier_block *this,
nft_net = nft_pernet(ctx.net);
mutex_lock(&nft_net->commit_mutex);
list_for_each_entry(table, &nft_net->tables, list) {
if (table->family != NFPROTO_NETDEV)
if (table->family != NFPROTO_NETDEV &&
table->family != NFPROTO_INET)
continue;
ctx.family = table->family;
@ -380,6 +382,11 @@ static int nf_tables_netdev_event(struct notifier_block *this,
if (!nft_is_base_chain(chain))
continue;
basechain = nft_base_chain(chain);
if (table->family == NFPROTO_INET &&
basechain->ops.hooknum != NF_INET_INGRESS)
continue;
ctx.chain = chain;
nft_netdev_event(event, dev, &ctx);
}