set SO_PASSCRED on listening socket to avoid this problem:

4dde1cb060

ipc/ipc.go

@@ -42,6 +42,9 @@ func NewServer(address string, factory MsgFactory, log *logging.Logger, handlers
 	}
 
 	listener, err := net.ListenUnix("unix", &net.UnixAddr{address, "unix"})
+	if err := setPassCred(listener); err != nil {
+		return nil, errors.New("Failed to set SO_PASSCRED on listening socket: " + err.Error())
+	}
 	if err != nil {
 		md.close()
 		return nil, err

ipc/util.go

@@ -1,17 +1,16 @@
 package ipc
 
 import (
-	"net"
 	"reflect"
 	"syscall"
 )
 
-func setPassCred(c net.Conn) error {
+func setPassCred(c interface{}) error {
 	fd := reflectFD(c)
 	return syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_PASSCRED, 1)
 }
 
-func reflectFD(c net.Conn) int {
+func reflectFD(c interface{}) int {
 	sysfd := extractField(c, "fd", "sysfd")
 	return int(sysfd.Int())
 }