diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/vxlan.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 763061d97921..607976c00162 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -1090,14 +1090,18 @@ static int vxlan_newlink(struct net *net, struct net_device *dev, if (data[IFLA_VXLAN_LOCAL]) vxlan->saddr = nla_get_be32(data[IFLA_VXLAN_LOCAL]); - if (data[IFLA_VXLAN_LINK]) { - vxlan->link = nla_get_u32(data[IFLA_VXLAN_LINK]); + if (data[IFLA_VXLAN_LINK] && + (vxlan->link = nla_get_u32(data[IFLA_VXLAN_LINK]))) { + struct net_device *lowerdev + = __dev_get_by_index(net, vxlan->link); + + if (!lowerdev) { + pr_info("ifindex %d does not exist\n", vxlan->link); + return -ENODEV; + } - if (!tb[IFLA_MTU]) { - struct net_device *lowerdev; - lowerdev = __dev_get_by_index(net, vxlan->link); + if (!tb[IFLA_MTU]) dev->mtu = lowerdev->mtu - VXLAN_HEADROOM; - } } if (data[IFLA_VXLAN_TOS]) |