From 19297c3ab23c4b2fe4abd13a992b7d7d10b07258 Mon Sep 17 00:00:00 2001 From: Johannes Nixdorf Date: Mon, 16 Oct 2023 15:27:23 +0200 Subject: net: bridge: Set strict_start_type for br_policy Set any new attributes added to br_policy to be parsed strictly, to prevent userspace from passing garbage. Signed-off-by: Johannes Nixdorf Acked-by: Nikolay Aleksandrov Reviewed-by: Ido Schimmel Link: https://lore.kernel.org/r/20231016-fdb_limit-v5-4-32cddff87758@avm.de Signed-off-by: Jakub Kicinski --- net/bridge/br_netlink.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/bridge/br_netlink.c') diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index 0c3cf6e6dea2..5ad4abfcb7ba 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -1229,6 +1229,8 @@ static size_t br_port_get_slave_size(const struct net_device *brdev, } static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { + [IFLA_BR_UNSPEC] = { .strict_start_type = + IFLA_BR_FDB_N_LEARNED }, [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 }, [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 }, [IFLA_BR_MAX_AGE] = { .type = NLA_U32 }, -- cgit