pkg: fix versionStrings out of bound

add check to length of versionStrings Signed-off-by: Li Chen <chenli3792@gmail.com>
cilium · Jun 25, 2023 · 8a7956c · 8a7956c
1 parent a1bca94
commit 8a7956c
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/pkg/kernels/kernels.go b/pkg/kernels/kernels.go
@@ -60,8 +60,13 @@ func GetKernelVersion(kernelVersion, procfs string) (int, string, error) {
 		version = int(KernelStringToNumeric(kernelVersion))
 		verStr = kernelVersion
 	} else {
+		var versionStrings []string
+
 		if versionSig, err := os.ReadFile(procfs + "/version_signature"); err == nil {
-			versionStrings := strings.Fields(string(versionSig))
+			versionStrings = strings.Fields(string(versionSig))
+		}
+
+		if len(versionStrings) > 0 {
 			version = int(KernelStringToNumeric(versionStrings[len(versionStrings)-1]))
 			verStr = versionStrings[len(versionStrings)-1]
 		} else {