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-rw-r--r--components/utilities/ulog/ulog.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/components/utilities/ulog/ulog.c b/components/utilities/ulog/ulog.c
index 8be20ae115..5fcc40ac07 100644
--- a/components/utilities/ulog/ulog.c
+++ b/components/utilities/ulog/ulog.c
@@ -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;