fix: race condition by ensuring goroutine completes writing to stdin …

…before going further

Signed-off-by: Prateek <[email protected]>

KubeArmor/common/common.go

@@ -18,6 +18,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	kc "github.com/kubearmor/KubeArmor/KubeArmor/config"
@@ -291,7 +292,11 @@ func GetCommandOutputWithoutErr(cmd string, args []string) string {
 		return ""
 	}
 
+	var wg sync.WaitGroup
+	wg.Add(1)
+
 	go func() {
+		defer wg.Done()
 		defer func() {
 			if err = stdin.Close(); err != nil {
 				kg.Warnf("Error closing stdin %s\n", err)
@@ -300,6 +305,9 @@ func GetCommandOutputWithoutErr(cmd string, args []string) string {
 		_, _ = io.WriteString(stdin, "values written to stdin are passed to cmd's standard input")
 	}()
 
+	// Wait for the stdin writing to complete
+	wg.Wait()
+
 	out, err := res.CombinedOutput()
 	if err != nil {
 		return ""