diff options
| -rw-r--r-- | pkg/tcpip/transport/udp/endpoint.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go index 56bdf6c34..9bcb918bb 100644 --- a/pkg/tcpip/transport/udp/endpoint.go +++ b/pkg/tcpip/transport/udp/endpoint.go @@ -487,6 +487,11 @@ func (e *endpoint) write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, <-c nicID = e.BindNICID } + if to.Port == 0 { + // Port 0 is an invalid port to send to. + return 0, nil, tcpip.ErrInvalidEndpointState + } + dst, netProto, err := e.checkV4MappedLocked(*to) if err != nil { return 0, nil, err |