diff options
Diffstat (limited to 'drivers/net/vrf.c')
| -rw-r--r-- | drivers/net/vrf.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index aa5d30428bba..ceda5861da78 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -877,6 +877,12 @@ static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev) { int ret; + /* do not allow loopback device to be enslaved to a VRF. + * The vrf device acts as the loopback for the vrf. + */ + if (port_dev == dev_net(dev)->loopback_dev) + return -EOPNOTSUPP; + port_dev->priv_flags |= IFF_L3MDEV_SLAVE; ret = netdev_master_upper_dev_link(port_dev, dev, NULL, NULL); if (ret < 0) |