diff options
| author |   Vishakha Narvekar <Vishakha.Narvekar@dell.com> | 2017-10-03 16:13:29 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-10-04 18:16:48 -0700 |
| commit | e769fcec6bc4bdd1b0e2cf817680148f9c40b1c4 (patch) | |
| tree | 11deb5a063028440de108c8779cf371469e23c37 /net/8021q/vlan_core.c | |
| parent | bpf: fix bpf_tail_call() x64 JIT (diff) | |
| download | linux-dev-e769fcec6bc4bdd1b0e2cf817680148f9c40b1c4.tar.xz linux-dev-e769fcec6bc4bdd1b0e2cf817680148f9c40b1c4.zip | |
net: 8021q: skip packets if the vlan is down
If the vlan is down, free the packet instead of proceeding with other
processing, or counting it as received. If vlan interfaces are used
as slaves for bonding, with arp monitoring for connectivity, if the rx
counter is seen to be incrementing, then the bond device will not
observe that the interface is down.
CC: David S. Miller <davem@davemloft.net>
Signed-off-by: Vishakha Narvekar <Vishakha.Narvekar@dell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q/vlan_core.c')
| -rw-r--r-- | net/8021q/vlan_core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c index e2ed69850489..0bc31de9071a 100644 --- a/net/8021q/vlan_core.c +++ b/net/8021q/vlan_core.c @@ -21,6 +21,12 @@ bool vlan_do_receive(struct sk_buff **skbp) if (unlikely(!skb)) return false; + if (unlikely(!(vlan_dev->flags & IFF_UP))) { + kfree_skb(skb); + *skbp = NULL; + return false; + } + skb->dev = vlan_dev; if (unlikely(skb->pkt_type == PACKET_OTHERHOST)) { /* Our lower layer thinks this is not local, let's make sure. |