diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 3447c962f..2ccac42d8 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -18,7 +18,8 @@ on:
     # The branches below must be a subset of the branches above
     branches: [ 4.0release, develop ]
   schedule:
-    - cron: '43 11 * * 0'
+    # '20 19 * * 6' means 'At 19:20, only on Saturday' @see https://crontab.cronhub.io/
+    - cron: '20 19 * * 6'
 
 jobs:
   analyze:
diff --git a/.gitignore b/.gitignore
index f3699a128..02e8ffa57 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,3 +40,4 @@ cmake-build-debug
 /trunk/ide/srs_clion/Makefile
 /trunk/ide/srs_clion/cmake_install.cmake
 /trunk/ide/srs_clion/srs
+/trunk/ide/srs_clion/Testing/
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a4c562c4..538575452 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ The changelog for SRS.
 
 ## SRS 4.0 Changelog
 
+* v4.0, 2021-07-17, Fix bugs and enhance code. 4.0.142
 * v4.0, 2021-07-16, Support [CLion and cmake](https://github.com/ossrs/srs/wiki/v4_CN_IDE#clion) to build and debug SRS. 4.0.141
 * v4.0, 2021-07-08, For [#2403](https://github.com/ossrs/srs/issues/2403), fix padding packets for RTMP2RTC. 4.0.140
 * v4.0, 2021-07-04, For [#2424](https://github.com/ossrs/srs/issues/2424), use srandom/random to generate. 4.0.139
diff --git a/trunk/src/app/srs_app_utility.cpp b/trunk/src/app/srs_app_utility.cpp
index 945ee54f6..a17b9af71 100644
--- a/trunk/src/app/srs_app_utility.cpp
+++ b/trunk/src/app/srs_app_utility.cpp
@@ -80,13 +80,14 @@ string srs_path_build_timestamp(string template_path)
     }
     
     // to calendar time
-    struct tm* tm;
+    struct tm now;
+    // Each of these functions returns NULL in case an error was detected. @see https://linux.die.net/man/3/localtime_r
     if (_srs_config->get_utc_time()) {
-        if ((tm = gmtime(&tv.tv_sec)) == NULL) {
+        if (gmtime_r(&tv.tv_sec, &now) == NULL) {
             return path;
         }
     } else {
-        if ((tm = localtime(&tv.tv_sec)) == NULL) {
+        if (localtime_r(&tv.tv_sec, &now) == NULL) {
             return path;
         }
     }
@@ -96,32 +97,32 @@ string srs_path_build_timestamp(string template_path)
     
     // [2006], replace with current year.
     if (true) {
-        snprintf(buf, sizeof(buf), "%04d", 1900 + tm->tm_year);
+        snprintf(buf, sizeof(buf), "%04d", 1900 + now.tm_year);
         path = srs_string_replace(path, "[2006]", buf);
     }
     // [01], replace this const to current month.
     if (true) {
-        snprintf(buf, sizeof(buf), "%02d", 1 + tm->tm_mon);
+        snprintf(buf, sizeof(buf), "%02d", 1 + now.tm_mon);
         path = srs_string_replace(path, "[01]", buf);
     }
     // [02], replace this const to current date.
     if (true) {
-        snprintf(buf, sizeof(buf), "%02d", tm->tm_mday);
+        snprintf(buf, sizeof(buf), "%02d", now.tm_mday);
         path = srs_string_replace(path, "[02]", buf);
     }
     // [15], replace this const to current hour.
     if (true) {
-        snprintf(buf, sizeof(buf), "%02d", tm->tm_hour);
+        snprintf(buf, sizeof(buf), "%02d", now.tm_hour);
         path = srs_string_replace(path, "[15]", buf);
     }
     // [04], repleace this const to current minute.
     if (true) {
-        snprintf(buf, sizeof(buf), "%02d", tm->tm_min);
+        snprintf(buf, sizeof(buf), "%02d", now.tm_min);
         path = srs_string_replace(path, "[04]", buf);
     }
     // [05], repleace this const to current second.
     if (true) {
-        snprintf(buf, sizeof(buf), "%02d", tm->tm_sec);
+        snprintf(buf, sizeof(buf), "%02d", now.tm_sec);
         path = srs_string_replace(path, "[05]", buf);
     }
     // [999], repleace this const to current millisecond.
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 2c415b46c..40bc3a08e 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR       4
 #define VERSION_MINOR       0
-#define VERSION_REVISION    141
+#define VERSION_REVISION    142
 
 #endif
diff --git a/trunk/src/protocol/srs_service_log.cpp b/trunk/src/protocol/srs_service_log.cpp
index 536da98ef..7170b7cc7 100644
--- a/trunk/src/protocol/srs_service_log.cpp
+++ b/trunk/src/protocol/srs_service_log.cpp
@@ -217,13 +217,14 @@ bool srs_log_header(char* buffer, int size, bool utc, bool dangerous, const char
     }
     
     // to calendar time
-    struct tm* tm;
+    struct tm now;
+    // Each of these functions returns NULL in case an error was detected. @see https://linux.die.net/man/3/localtime_r
     if (utc) {
-        if ((tm = gmtime(&tv.tv_sec)) == NULL) {
+        if (gmtime_r(&tv.tv_sec, &now) == NULL) {
             return false;
         }
     } else {
-        if ((tm = localtime(&tv.tv_sec)) == NULL) {
+        if (localtime_r(&tv.tv_sec, &now) == NULL) {
             return false;
         }
     }
@@ -233,24 +234,24 @@ bool srs_log_header(char* buffer, int size, bool utc, bool dangerous, const char
         if (tag) {
             written = snprintf(buffer, size,
                 "[%d-%02d-%02d %02d:%02d:%02d.%03d][%s][%d][%s][%d][%s] ",
-                1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, (int)(tv.tv_usec / 1000),
+                1900 + now.tm_year, 1 + now.tm_mon, now.tm_mday, now.tm_hour, now.tm_min, now.tm_sec, (int)(tv.tv_usec / 1000),
                 level, getpid(), cid.c_str(), errno, tag);
         } else {
             written = snprintf(buffer, size,
                 "[%d-%02d-%02d %02d:%02d:%02d.%03d][%s][%d][%s][%d] ",
-                1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, (int)(tv.tv_usec / 1000),
+                1900 + now.tm_year, 1 + now.tm_mon, now.tm_mday, now.tm_hour, now.tm_min, now.tm_sec, (int)(tv.tv_usec / 1000),
                 level, getpid(), cid.c_str(), errno);
         }
     } else {
         if (tag) {
             written = snprintf(buffer, size,
                 "[%d-%02d-%02d %02d:%02d:%02d.%03d][%s][%d][%s][%s] ",
-                1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, (int)(tv.tv_usec / 1000),
+                1900 + now.tm_year, 1 + now.tm_mon, now.tm_mday, now.tm_hour, now.tm_min, now.tm_sec, (int)(tv.tv_usec / 1000),
                 level, getpid(), cid.c_str(), tag);
         } else {
             written = snprintf(buffer, size,
                 "[%d-%02d-%02d %02d:%02d:%02d.%03d][%s][%d][%s] ",
-                1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, (int)(tv.tv_usec / 1000),
+                1900 + now.tm_year, 1 + now.tm_mon, now.tm_mday, now.tm_hour, now.tm_min, now.tm_sec, (int)(tv.tv_usec / 1000),
                 level, getpid(), cid.c_str());
         }
     }