diff --git a/cmd/controller/controller.go b/cmd/controller/controller.go
index c0ebf036110..e5845b87c50 100644
--- a/cmd/controller/controller.go
+++ b/cmd/controller/controller.go
@@ -26,7 +26,7 @@ func CmdMain() {
 	defer klog.Flush()
 
 	stopCh := signals.SetupSignalHandler()
-	klog.Infof(versions.String())
+	klog.Info(versions.String())
 
 	controller.InitClientGoMetrics()
 	controller.InitWorkQueueMetrics()
diff --git a/cmd/daemon/cniserver.go b/cmd/daemon/cniserver.go
index a9d4ae8b2e9..145ab22fd49 100644
--- a/cmd/daemon/cniserver.go
+++ b/cmd/daemon/cniserver.go
@@ -27,7 +27,7 @@ import (
 func CmdMain() {
 	defer klog.Flush()
 
-	klog.Infof(versions.String())
+	klog.Info(versions.String())
 	daemon.InitMetrics()
 	util.InitKlogMetrics()
 
diff --git a/cmd/ovn_monitor/ovn_monitor.go b/cmd/ovn_monitor/ovn_monitor.go
index 1682d7b34f6..68b32ed5f2c 100644
--- a/cmd/ovn_monitor/ovn_monitor.go
+++ b/cmd/ovn_monitor/ovn_monitor.go
@@ -19,7 +19,7 @@ import (
 func CmdMain() {
 	defer klog.Flush()
 
-	klog.Infof(versions.String())
+	klog.Info(versions.String())
 	config, err := ovn.ParseFlags()
 	if err != nil {
 		util.LogFatalAndExit(err, "failed to parse config")
diff --git a/cmd/pinger/pinger.go b/cmd/pinger/pinger.go
index bd8ef68d998..ff1ee11f6a0 100644
--- a/cmd/pinger/pinger.go
+++ b/cmd/pinger/pinger.go
@@ -17,7 +17,7 @@ import (
 func CmdMain() {
 	defer klog.Flush()
 
-	klog.Infof(versions.String())
+	klog.Info(versions.String())
 	pinger.InitPingerMetrics()
 	util.InitKlogMetrics()
 	config, err := pinger.ParseFlags()
diff --git a/cmd/speaker/speaker.go b/cmd/speaker/speaker.go
index d61cb9e5f31..0348ac7d11f 100644
--- a/cmd/speaker/speaker.go
+++ b/cmd/speaker/speaker.go
@@ -17,7 +17,7 @@ import (
 func CmdMain() {
 	defer klog.Flush()
 
-	klog.Infof(versions.String())
+	klog.Info(versions.String())
 	config, err := speaker.ParseFlags()
 	if err != nil {
 		util.LogFatalAndExit(err, "failed to parse config")
diff --git a/cmd/webhook/server.go b/cmd/webhook/server.go
index b20cb9ff6ad..b8babf305bc 100644
--- a/cmd/webhook/server.go
+++ b/cmd/webhook/server.go
@@ -37,7 +37,7 @@ func init() {
 
 func main() {
 	var port int
-	klog.Infof(versions.String())
+	klog.Info(versions.String())
 
 	port = *pflag.Int("port", 8443, "The port webhook listen on.")
 
diff --git a/pkg/controller/namespace.go b/pkg/controller/namespace.go
index ed0225a8e6c..1388f4e1570 100644
--- a/pkg/controller/namespace.go
+++ b/pkg/controller/namespace.go
@@ -177,7 +177,7 @@ func (c *Controller) handleAddNamespace(key string) error {
 	}
 
 	op := "replace"
-	if namespace.Annotations == nil || len(namespace.Annotations) == 0 {
+	if len(namespace.Annotations) == 0 {
 		op = "add"
 		namespace.Annotations = map[string]string{}
 	} else {
diff --git a/pkg/daemon/ovs.go b/pkg/daemon/ovs.go
index 1d4f9c1dc28..78225f8eb72 100644
--- a/pkg/daemon/ovs.go
+++ b/pkg/daemon/ovs.go
@@ -374,7 +374,7 @@ func configureNodeNic(portName, ip, gw, joinCIDR string, macAddr net.HardwareAdd
 		fmt.Sprintf("external_ids:ip=%s", ipStr))
 	if err != nil {
 		klog.Errorf("failed to configure node nic %s: %v, %q", portName, err, raw)
-		return fmt.Errorf(raw)
+		return errors.New(raw)
 	}
 
 	if err = configureNic(util.NodeNic, ip, macAddr, mtu, false, false); err != nil {
@@ -484,7 +484,7 @@ func configureGlobalMirror(portName string, mtu int) error {
 		"add", "bridge", "br-int", "mirrors", "@m")
 	if err != nil {
 		klog.Errorf("failed to configure mirror nic %s %q", portName, raw)
-		return fmt.Errorf(raw)
+		return errors.New(raw)
 	}
 	return configureMirrorLink(portName, mtu)
 }
@@ -498,7 +498,7 @@ func configureEmptyMirror(portName string, mtu int) error {
 		"add", "bridge", "br-int", "mirrors", "@m")
 	if err != nil {
 		klog.Errorf("failed to configure mirror nic %s %q", portName, raw)
-		return fmt.Errorf(raw)
+		return errors.New(raw)
 	}
 	return configureMirrorLink(portName, mtu)
 }
diff --git a/pkg/daemon/server.go b/pkg/daemon/server.go
index c5417d9914b..801e72f6399 100644
--- a/pkg/daemon/server.go
+++ b/pkg/daemon/server.go
@@ -64,7 +64,7 @@ func createHandler(csh *cniServerHandler) http.Handler {
 func requestAndResponseLogger(request *restful.Request, response *restful.Response,
 	chain *restful.FilterChain,
 ) {
-	klog.Infof(formatRequestLog(request))
+	klog.Info(formatRequestLog(request))
 	start := time.Now()
 	chain.ProcessFilter(request, response)
 	elapsed := float64((time.Since(start)) / time.Millisecond)
@@ -72,7 +72,7 @@ func requestAndResponseLogger(request *restful.Request, response *restful.Respon
 		nodeName,
 		getRequestURI(request),
 		fmt.Sprintf("%d", response.StatusCode())).Observe(elapsed / 1000)
-	klog.Infof(formatResponseLog(response, request, elapsed))
+	klog.Info(formatResponseLog(response, request, elapsed))
 }
 
 // formatRequestLog formats request log string.
diff --git a/pkg/ovs/ovs-vsctl.go b/pkg/ovs/ovs-vsctl.go
index e80279c1853..f49dfe102e2 100644
--- a/pkg/ovs/ovs-vsctl.go
+++ b/pkg/ovs/ovs-vsctl.go
@@ -327,7 +327,7 @@ func ConfigInterfaceMirror(globalMirror bool, open, iface string) error {
 				return err
 			}
 			if len(portUUIDs) != 1 {
-				return fmt.Errorf(fmt.Sprintf("find port failed, portName=%s", ifName))
+				return fmt.Errorf("find port failed, portName=%s", ifName)
 			}
 			portId := portUUIDs[0]
 			if open == "true" {
diff --git a/pkg/util/network_attachment.go b/pkg/util/network_attachment.go
index dc62c53e6da..d868d4d64e7 100644
--- a/pkg/util/network_attachment.go
+++ b/pkg/util/network_attachment.go
@@ -47,12 +47,12 @@ func parsePodNetworkObjectName(podnetwork string) (string, string, string, error
 		// nolint:staticcheck
 		matched, _ := regexp.MatchString("^[a-z0-9]([-a-z0-9]*[a-z0-9])?$", allItems[i])
 		if !matched && len([]rune(allItems[i])) > 0 {
-			klog.Errorf(fmt.Sprintf("parsePodNetworkObjectName: Failed to parse: "+
+			klog.Errorf("parsePodNetworkObjectName: Failed to parse: "+
 				"one or more items did not match comma-delimited format (must consist of lower case alphanumeric characters). "+
-				"Must start and end with an alphanumeric character), mismatch @ '%v'", allItems[i]))
-			return "", "", "", fmt.Errorf(fmt.Sprintf("parsePodNetworkObjectName: Failed to parse: "+
+				"Must start and end with an alphanumeric character), mismatch @ '%v'", allItems[i])
+			return "", "", "", fmt.Errorf("parsePodNetworkObjectName: Failed to parse: "+
 				"one or more items did not match comma-delimited format (must consist of lower case alphanumeric characters). "+
-				"Must start and end with an alphanumeric character), mismatch @ '%v'", allItems[i]))
+				"Must start and end with an alphanumeric character), mismatch @ '%v'", allItems[i])
 		}
 	}