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net: bridge: Set strict_start_type at two policies

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Make any attributes newly-added to br_port_policy or vlan_tunnel_policy
parsed strictly, to prevent userspace from passing garbage. Note that this
patchset only touches the former policy. The latter was adjusted for
completeness' sake. There do not appear to be other _deprecated calls
with non-NULL policies.

Suggested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2023-02-02 18:59:19 +01:00 committed by David S. Miller
parent 8b7018fa71
commit c00041cf1c
2 changed files with 5 additions and 0 deletions
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2
net/bridge/br_netlink.c
View file

@ -858,6 +858,8 @@ static int br_afspec(struct net_bridge *br,
}
static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
[IFLA_BRPORT_UNSPEC] = { .strict_start_type =
IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT + 1 },
[IFLA_BRPORT_STATE] = { .type = NLA_U8 },
[IFLA_BRPORT_COST] = { .type = NLA_U32 },
[IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },

3
net/bridge/br_netlink_tunnel.c
View file

@ -188,6 +188,9 @@ int br_fill_vlan_tunnel_info(struct sk_buff *skb,
}
static const struct nla_policy vlan_tunnel_policy[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1] = {
[IFLA_BRIDGE_VLAN_TUNNEL_UNSPEC] = {
.strict_start_type = IFLA_BRIDGE_VLAN_TUNNEL_FLAGS + 1
},
[IFLA_BRIDGE_VLAN_TUNNEL_ID] = { .type = NLA_U32 },
[IFLA_BRIDGE_VLAN_TUNNEL_VID] = { .type = NLA_U16 },
[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS] = { .type = NLA_U16 },