[components] [fdt] add parameter check

components/drivers/fdt/libfdt/fdt_rw.c

@@ -96,7 +96,9 @@ static int _fdt_splice(void *fdt, void *splicepoint, int oldlen, int newlen)
 {
     char *p = splicepoint;
     char *end = (char *)fdt + _fdt_data_size(fdt);
-
+    
+    if (oldlen <= 0)
+        return -FDT_ERR_BADOFFSET;
     if (((p + oldlen) < p) || ((p + oldlen) > end))
         return -FDT_ERR_BADOFFSET;
     if ((p < (char *)fdt) || ((end - oldlen + newlen) < (char *)fdt))