Better to close file explicitly (#5289)

Signed-off-by: Changxin Miao <[email protected]>

pkg/fuse/device_linux.go

@@ -103,6 +103,7 @@ func grantAccess() error {
 	if err != nil {
 		return errors.Wrapf(err, "open %s", deviceAllowPath)
 	}
+	defer f.Close()
 	// 10, 229 according to https://www.kernel.org/doc/Documentation/admin-guide/devices.txt
 	content := "c 10:229 rwm"
 	_, err = f.WriteString(content)