From 7e4a51319d3a71ac8002c96f817bcbeb36789b07 Mon Sep 17 00:00:00 2001 From: Andrei Vagin Date: Tue, 6 Apr 2021 23:40:03 -0700 Subject: [PATCH] net: introduce nla_policy for IFLA_NEW_IFINDEX In this case, we don't need to check that new_ifindex is positive in validate_linkmsg. Fixes: eeb85a14ee34 ("net: Allow to specify ifindex when device is moved to another namespace") Suggested-by: Jakub Kicinski Signed-off-by: Andrei Vagin Acked-by: Jakub Kicinski Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index d51252afde0a..9108a7e6c0c0 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1877,6 +1877,7 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = { .len = ALTIFNAMSIZ - 1 }, [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT }, [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED }, + [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1), }; static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { @@ -2266,9 +2267,6 @@ static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) return -EINVAL; } - if (tb[IFLA_NEW_IFINDEX] && nla_get_s32(tb[IFLA_NEW_IFINDEX]) <= 0) - return -EINVAL; - if (tb[IFLA_AF_SPEC]) { struct nlattr *af; int rem, err; -- 2.25.1