[utilities][ulog] fix ulog backend color log length calculation error
@@ -408,7 +408,11 @@ void ulog_output_to_all_backend(rt_uint32_t level, const char *tag, rt_bool_t is
else
{
/* recalculate the log start address and log size when backend not supported color */
- rt_size_t color_info_len = rt_strlen(color_output_info[level]), output_size = size;
+ rt_size_t color_info_len = 0, output_size = size;
+
+ if (color_output_info[level] != RT_NULL)
+ color_info_len = rt_strlen(color_output_info[level]);
+
if (color_info_len)
{
rt_size_t color_hdr_len = rt_strlen(CSI_START) + color_info_len;
