diff --git a/base/BUILD.gn b/base/BUILD.gn
index 452d3a61a9c7f1367fb201ddb3a490909f68d51e..6a579029c71fb9917c0d9215dda3f2e24f17ea24 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -19,6 +19,7 @@ declare_args() {
   c_utils_track_all = false
   c_utils_print_track_at_once = false
   c_utils_debug_log_enabled = false
+  c_utils_debug_intsan = false
 }
 
 config("utils_config") {
@@ -144,6 +145,18 @@ ohos_shared_library("utils") {
   } else {
     sources = sources_utils
     configs = [ ":utils_coverage_config" ]
+
+    if (c_utils_debug_intsan) {
+      sanitize = {
+        integer_overflow = true
+        debug = true
+      }
+    } else {
+      sanitize = {
+        integer_overflow = true
+      }
+    }
+
     if (c_utils_debug_refbase) {
       configs += [ ":debug_refbase" ]
       if (c_utils_track_all) {
diff --git a/base/src/string_ex.cpp b/base/src/string_ex.cpp
index b279544be72336255a93c0006acb6f2bebeed0f8..abe32fdf2668c9715382c5d88767e85c58f4cea7 100644
--- a/base/src/string_ex.cpp
+++ b/base/src/string_ex.cpp
@@ -57,8 +57,16 @@ string ReplaceStr(const string& str, const string& src, const string& dst)
 string TrimStr(const string& str, const char cTrim /*= ' '*/)
 {
     string strTmp = str;
-    strTmp.erase(0, strTmp.find_first_not_of(cTrim));
-    strTmp.erase(strTmp.find_last_not_of(cTrim) + sizeof(char));
+    std::string::size_type firstBound = strTmp.find_first_not_of(cTrim);
+    std::string::size_type lastBound = strTmp.find_last_not_of(cTrim);
+    if (firstBound != std::string::npos) {
+        strTmp.erase(0, firstBound);
+    }
+
+    if (lastBound != std::string::npos && lastBound != strTmp.size()) {
+        strTmp.erase(lastBound + sizeof(char));
+    }
+
     return strTmp;
 }