Fix goroutine leak in ipaddress

Signed-off-by: Vladimir Popov <[email protected]>

pkg/kernel/networkservice/connectioncontextkernel/ipcontext/ipaddress/common.go

@@ -92,10 +92,18 @@ func create(ctx context.Context, conn *networkservice.Connection, isClient bool)
 
 		ch := make(chan netlink.AddrUpdate)
 		done := make(chan struct{})
-		defer close(done)
+
 		if err := netlink.AddrSubscribeAt(targetNetNS, ch, done); err != nil {
 			return errors.Wrapf(err, "failed to subscribe for interface address updates")
 		}
+
+		defer func() {
+			close(done)
+			// `ch` should be fully read after the `done` close to prevent goroutine leak in `netlink.AddrSubscribeAt`
+			for range ch {
+			}
+		}()
+
 		for _, ipNet := range ipNets {
 			now := time.Now()
 			addr := &netlink.Addr{