diff --git a/be/src/olap/key_coder.h b/be/src/olap/key_coder.h
index 3602958d479400..8eb65140c9a2c0 100644
--- a/be/src/olap/key_coder.h
+++ b/be/src/olap/key_coder.h
@@ -261,12 +261,13 @@ class KeyCoderTraits<FieldType::OLAP_FIELD_TYPE_DECIMAL> {
 template <>
 class KeyCoderTraits<FieldType::OLAP_FIELD_TYPE_CHAR> {
 public:
-    static void full_encode_ascending(const void* value, std::string* buf) {
+    NO_SANITIZE_UNDEFINED static void full_encode_ascending(const void* value, std::string* buf) {
         auto slice = reinterpret_cast<const Slice*>(value);
         buf->append(slice->get_data(), slice->get_size());
     }
 
-    static void encode_ascending(const void* value, size_t index_size, std::string* buf) {
+    NO_SANITIZE_UNDEFINED static void encode_ascending(const void* value, size_t index_size,
+                                                       std::string* buf) {
         const Slice* slice = (const Slice*)value;
         CHECK(index_size <= slice->size)
                 << "index size is larger than char size, index=" << index_size
@@ -282,12 +283,13 @@ class KeyCoderTraits<FieldType::OLAP_FIELD_TYPE_CHAR> {
 template <>
 class KeyCoderTraits<FieldType::OLAP_FIELD_TYPE_VARCHAR> {
 public:
-    static void full_encode_ascending(const void* value, std::string* buf) {
+    NO_SANITIZE_UNDEFINED static void full_encode_ascending(const void* value, std::string* buf) {
         auto slice = reinterpret_cast<const Slice*>(value);
         buf->append(slice->get_data(), slice->get_size());
     }
 
-    static void encode_ascending(const void* value, size_t index_size, std::string* buf) {
+    NO_SANITIZE_UNDEFINED static void encode_ascending(const void* value, size_t index_size,
+                                                       std::string* buf) {
         const Slice* slice = (const Slice*)value;
         size_t copy_size = std::min(index_size, slice->size);
         buf->append(slice->data, copy_size);
@@ -301,12 +303,13 @@ class KeyCoderTraits<FieldType::OLAP_FIELD_TYPE_VARCHAR> {
 template <>
 class KeyCoderTraits<FieldType::OLAP_FIELD_TYPE_STRING> {
 public:
-    static void full_encode_ascending(const void* value, std::string* buf) {
+    NO_SANITIZE_UNDEFINED static void full_encode_ascending(const void* value, std::string* buf) {
         auto slice = reinterpret_cast<const Slice*>(value);
         buf->append(slice->get_data(), slice->get_size());
     }
 
-    static void encode_ascending(const void* value, size_t index_size, std::string* buf) {
+    NO_SANITIZE_UNDEFINED static void encode_ascending(const void* value, size_t index_size,
+                                                       std::string* buf) {
         const Slice* slice = (const Slice*)value;
         size_t copy_size = std::min(index_size, slice->size);
         buf->append(slice->data, copy_size);
diff --git a/conf/ubsan_ignorelist.txt b/conf/ubsan_ignorelist.txt
index 9cf750cb44a287..c107b2c5e91a4b 100644
--- a/conf/ubsan_ignorelist.txt
+++ b/conf/ubsan_ignorelist.txt
@@ -10,6 +10,7 @@ src:*/json/new_json_reader.cpp
 src:*/common/memcpy_small.h
 src:*/util/mysql_row_buffer.cpp
 src:*/util/bitmap_intersect.h
+src:*/util/slice.h
 fun:*BaseFieldTypeTraits*
 fun:*FieldTypeTraits*
 fun:*KeyCoderTraits*
diff --git a/conf/ubsan_suppr.conf b/conf/ubsan_suppr.conf
index 82e118c798133b..4d4dc69b4b6768 100644
--- a/conf/ubsan_suppr.conf
+++ b/conf/ubsan_suppr.conf
@@ -15,4 +15,5 @@
 # specific language governing permissions and limitations
 # under the License.
 
-alignment:hash_util.hpp
\ No newline at end of file
+alignment:hash_util.hpp
+alignment:slice.h
\ No newline at end of file