Merge branch 'main' into romain.marcadier/alb-event/APPSEC-42909

pkg/networkdevice/testutils/freeport.go

@@ -9,11 +9,36 @@ package testutils
 
 import (
 	"net"
+	"sync"
+)
+
+var (
+	globalMutex sync.Mutex // Prevent the util function to be called concurrently
+	usedPorts   = make(map[uint16]bool)
 )
 
 // GetFreePort finds a free port to use for testing.
 // Borrowed from: https://github.com/phayes/freeport/blame/master/freeport.go#L8-L20
 func GetFreePort() (uint16, error) {
+	globalMutex.Lock()
+	defer globalMutex.Unlock()
+
+	var lastError error
+	for retries := 0; retries < 5; retries++ {
+		port, err := getSingleFreePort()
+		if err != nil {
+			lastError = err
+			continue
+		}
+		if _, ok := usedPorts[port]; !ok {
+			usedPorts[port] = true
+			return port, nil
+		}
+	}
+	return 0, lastError
+}
+
+func getSingleFreePort() (uint16, error) {
 	addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
 	if err != nil {
 		return 0, err