From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
commit 776d451648443f9884be4a1b4e38e8faf1c621f9 upstream.
Bail out on using the tunnel dst template from other than netdev family.
Add the infrastructure to check for the family in objects.
Fixes: af308b94a2a4 ("netfilter: nf_tables: add tunnel support")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
[KN: Backport patch according to v5.10.x source]
Signed-off-by: Kuntal Nayak <kuntal.nayak@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/net/netfilter/nf_tables.h | 2 ++
net/netfilter/nf_tables_api.c | 14 +++++++++-----
net/netfilter/nft_tunnel.c | 1 +
3 files changed, 12 insertions(+), 5 deletions(-)
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -1174,6 +1174,7 @@ void nft_obj_notify(struct net *net, con
* @type: stateful object numeric type
* @owner: module owner
* @maxattr: maximum netlink attribute
+ * @family: address family for AF-specific object types
* @policy: netlink attribute policy
*/
struct nft_object_type {
@@ -1183,6 +1184,7 @@ struct nft_object_type {
struct list_head list;
u32 type;
unsigned int maxattr;
+ u8 family;
struct module *owner;
const struct nla_policy *policy;
};
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -6234,11 +6234,15 @@ nla_put_failure:
return -1;
}
-static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
+static const struct nft_object_type *__nft_obj_type_get(u32 objtype, u8 family)
{
const struct nft_object_type *type;
list_for_each_entry(type, &nf_tables_objects, list) {
+ if (type->family != NFPROTO_UNSPEC &&
+ type->family != family)
+ continue;
+
if (objtype == type->type)
return type;
}
@@ -6246,11 +6250,11 @@ static const struct nft_object_type *__n
}
static const struct nft_object_type *
-nft_obj_type_get(struct net *net, u32 objtype)
+nft_obj_type_get(struct net *net, u32 objtype, u8 family)
{
const struct nft_object_type *type;
- type = __nft_obj_type_get(objtype);
+ type = __nft_obj_type_get(objtype, family);
if (type != NULL && try_module_get(type->owner))
return type;
@@ -6343,7 +6347,7 @@ static int nf_tables_newobj(struct net *
if (nlh->nlmsg_flags & NLM_F_REPLACE)
return -EOPNOTSUPP;
- type = __nft_obj_type_get(objtype);
+ type = __nft_obj_type_get(objtype, family);
nft_ctx_init(&ctx, net, skb, nlh, family, table, NULL, nla);
return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
@@ -6354,7 +6358,7 @@ static int nf_tables_newobj(struct net *
if (!nft_use_inc(&table->use))
return -EMFILE;
- type = nft_obj_type_get(net, objtype);
+ type = nft_obj_type_get(net, objtype, family);
if (IS_ERR(type)) {
err = PTR_ERR(type);
goto err_type;
--- a/net/netfilter/nft_tunnel.c
+++ b/net/netfilter/nft_tunnel.c
@@ -684,6 +684,7 @@ static const struct nft_object_ops nft_t
static struct nft_object_type nft_tunnel_obj_type __read_mostly = {
.type = NFT_OBJECT_TUNNEL,
+ .family = NFPROTO_NETDEV,
.ops = &nft_tunnel_obj_ops,
.maxattr = NFTA_TUNNEL_KEY_MAX,
.policy = nft_tunnel_key_policy,
Patches currently in stable-queue which might be from pablo@xxxxxxxxxxxxx are
queue-5.10/netfilter-nf_tables-fix-potential-data-race-in-__nft_obj_type_get.patch
queue-5.10/netfilter-tproxy-bail-out-if-ip-has-been-disabled-on.patch
queue-5.10/netfilter-nfnetlink_queue-acquire-rcu_read_lock-in-i.patch
queue-5.10/netfilter-nft_payload-restore-vlan-q-in-q-match-supp.patch
queue-5.10/netfilter-nf_tables-restrict-tunnel-object-to-nfproto_netdev.patch
