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vrf: prevent adding upper devices

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VRF devices don't work with upper devices. Currently, it's possible to
add a VRF device to a bridge or team, and to create macvlan, macsec, or
ipvlan devices on top of a VRF (bond and vlan are prevented respectively
by the lack of an ndo_set_mac_address op and the NETIF_F_VLAN_CHALLENGED
feature flag).

Fix this by setting the IFF_NO_RX_HANDLER flag (introduced in commit
f5426250a6 ("net: introduce IFF_NO_RX_HANDLER")).

Cc: David Ahern <dsahern@gmail.com>
Fixes: 193125dbd8 ("net: Introduce VRF device driver")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca 2019-03-26 18:22:16 +01:00 committed by David S. Miller
parent 23da1021a5
commit 1017e09871
1 changed files with 1 additions and 0 deletions
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drivers/net/vrf.c
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@ -1273,6 +1273,7 @@ static void vrf_setup(struct net_device *dev)
/* default to no qdisc; user can add if desired */
dev->priv_flags |= IFF_NO_QUEUE;
dev->priv_flags |= IFF_NO_RX_HANDLER;
dev->min_mtu = 0;
dev->max_mtu = 0;