diff options
| -rw-r--r-- | pkg/tcpip/stack/nic.go | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index 4a34805b5..8a946b4fa 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -217,6 +217,16 @@ func (n *NIC) disableLocked() { ep.Disable() } + // Clear the neighbour table (including static entries) as we cannot guarantee + // that the current neighbour table will be valid when the NIC is enabled + // again. + // + // This matches linux's behaviour at the time of writing: + // https://github.com/torvalds/linux/blob/71c061d2443814de15e177489d5cc00a4a253ef3/net/core/neighbour.c#L371 + if err := n.clearNeighbors(); err != nil && err != tcpip.ErrNotSupported { + panic(fmt.Sprintf("n.clearNeighbors(): %s", err)) + } + if !n.setEnabled(false) { panic("should have only done work to disable the NIC if it was enabled") } |