diff --git a/mysql-test/r/loaddata.result b/mysql-test/r/loaddata.result
index 2d67d24bedd..2f2a3579eec 100644
--- a/mysql-test/r/loaddata.result
+++ b/mysql-test/r/loaddata.result
@@ -507,7 +507,7 @@ DROP TABLE t1;
 # Bug#11765139  58069: LOAD DATA INFILE: VALGRIND REPORTS INVALID MEMORY READS AND WRITES WITH U
 #
 CREATE TABLE t1(f1 INT);
-SELECT 0xE1BB30 INTO OUTFILE 't1.dat';
+SELECT 0xE1C330 INTO OUTFILE 't1.dat';
 LOAD DATA INFILE 't1.dat' IGNORE INTO TABLE t1 CHARACTER SET utf8;
 DROP TABLE t1;
 #
@@ -532,3 +532,27 @@ FIELDS TERMINATED BY 't' LINES TERMINATED BY '';
 Got one of the listed errors
 SET @@sql_mode= @old_mode;
 DROP TABLE t1;
+
+#
+#  Bug#23080148 - Backport of Bug#20683959.
+#  Bug#20683959 LOAD DATA INFILE IGNORES A SPECIFIC ROW SILENTLY
+#               UNDER DB CHARSET IS UTF8.
+#
+CREATE DATABASE d1 CHARSET latin1;
+USE d1;
+CREATE TABLE t1 (val TEXT);
+LOAD DATA INFILE '../../std_data/bug20683959loaddata.txt' INTO TABLE t1;
+SELECT COUNT(*) FROM t1;
+COUNT(*)
+1
+SELECT HEX(val) FROM t1;
+HEX(val)
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
+CREATE DATABASE d2 CHARSET utf8;
+USE d2;
+CREATE TABLE t1 (val TEXT);
+LOAD DATA INFILE '../../std_data/bug20683959loaddata.txt' INTO TABLE t1;
+ERROR HY000: Invalid utf8 character string: '�"RT @niouzechun: \9058\221A'
+DROP TABLE d1.t1, d2.t1;
+DROP DATABASE d1;
+DROP DATABASE d2;
diff --git a/mysql-test/std_data/bug20683959loaddata.txt b/mysql-test/std_data/bug20683959loaddata.txt
new file mode 100644
index 00000000000..1878cc78879
--- /dev/null
+++ b/mysql-test/std_data/bug20683959loaddata.txt
@@ -0,0 +1 @@
+Ã"RT @niouzechun: 遘√����繝上ャ繝斐����繧ｨ繝ｳ繝牙耳縺ｪ繧薙□縺代ｌ縺ｩ縲√い繝ｳ繝上ャ繝斐����繧ｨ繝ｳ繝峨ｄ諠ｨ蜉����噪縺ｪ縺願ｩｱ繧偵≠縺ｾ繧顔ｩ肴･ｵ逧����↓鞫ょ叙縺励↑縺����炊逕ｱ縺ｯ縲∫樟螳溘����莠ｺ逕溘����蝓ｺ譛ｬ逧����↓縺����∪縺上＞縺九↑縺����＠荳榊ｹｳ遲峨□縺礼炊荳榊ｰｽ縺�縺苓ｾ帙＞
diff --git a/mysql-test/t/loaddata.test b/mysql-test/t/loaddata.test
index aa7be52484e..9a664b84843 100644
--- a/mysql-test/t/loaddata.test
+++ b/mysql-test/t/loaddata.test
@@ -610,7 +610,7 @@ disconnect con1;
 --echo #
 
 CREATE TABLE t1(f1 INT);
-EVAL SELECT 0xE1BB30 INTO OUTFILE 't1.dat';
+EVAL SELECT 0xE1C330 INTO OUTFILE 't1.dat';
 --disable_warnings
 LOAD DATA INFILE 't1.dat' IGNORE INTO TABLE t1 CHARACTER SET utf8;
 --enable_warnings
@@ -656,3 +656,26 @@ SET @@sql_mode= @old_mode;
 --remove_file $MYSQLTEST_VARDIR/mysql
 DROP TABLE t1;
 
+--echo
+--echo #
+--echo #  Bug#23080148 - Backport of Bug#20683959.
+--echo #  Bug#20683959 LOAD DATA INFILE IGNORES A SPECIFIC ROW SILENTLY
+--echo #               UNDER DB CHARSET IS UTF8.
+--echo #
+
+CREATE DATABASE d1 CHARSET latin1;
+USE d1;
+CREATE TABLE t1 (val TEXT);
+LOAD DATA INFILE '../../std_data/bug20683959loaddata.txt' INTO TABLE t1;
+SELECT COUNT(*) FROM t1;
+SELECT HEX(val) FROM t1;
+
+CREATE DATABASE d2 CHARSET utf8;
+USE d2;
+CREATE TABLE t1 (val TEXT);
+--error ER_INVALID_CHARACTER_STRING
+LOAD DATA INFILE '../../std_data/bug20683959loaddata.txt' INTO TABLE t1;
+
+DROP TABLE d1.t1, d2.t1;
+DROP DATABASE d1;
+DROP DATABASE d2;
diff --git a/sql/sql_load.cc b/sql/sql_load.cc
index c084e5e3839..a46967a24a8 100644
--- a/sql/sql_load.cc
+++ b/sql/sql_load.cc
@@ -1363,8 +1363,8 @@ READ_INFO::READ_INFO(File file_par, uint tot_length, CHARSET_INFO *cs,
   set_if_bigger(length,line_start.length());
   stack=stack_pos=(int*) sql_alloc(sizeof(int)*length);
 
-  if (!(buffer=(uchar*) my_malloc(buff_length+1,MYF(0))))
-    error=1; /* purecov: inspected */
+  if (!(buffer=(uchar*) my_malloc(buff_length+1,MYF(MY_WME))))
+    error= true; /* purecov: inspected */
   else
   {
     end_of_buff=buffer+buff_length;
@@ -1556,37 +1556,50 @@ int READ_INFO::read_field()
 	}
       }
 #ifdef USE_MB
-      if (my_mbcharlen(read_charset, chr) > 1 &&
-          to + my_mbcharlen(read_charset, chr) <= end_of_buff)
-      {
-        uchar* p= to;
-        int ml, i;
-        *to++ = chr;
-
-        ml= my_mbcharlen(read_charset, chr);
-
-        for (i= 1; i < ml; i++) 
+        uint ml= my_mbcharlen(read_charset, chr);
+        if (ml == 0)
         {
-          chr= GET;
-          if (chr == my_b_EOF)
-          {
-            /*
-             Need to back up the bytes already ready from illformed
-             multi-byte char 
-            */
-            to-= i;
-            goto found_eof;
-          }
-          *to++ = chr;
+          *to= '\0';
+          my_error(ER_INVALID_CHARACTER_STRING, MYF(0),
+                   read_charset->csname, buffer);
+          error= true;
+          return 1;
         }
-        if (my_ismbchar(read_charset,
+
+        if (ml > 1 &&
+            to + ml <= end_of_buff)
+        {
+          uchar* p= to;
+          *to++ = chr;
+
+          for (uint i= 1; i < ml; i++)
+          {
+            chr= GET;
+            if (chr == my_b_EOF)
+            {
+              /*
+                Need to back up the bytes already ready from illformed
+                multi-byte char 
+              */
+              to-= i;
+              goto found_eof;
+            }
+            *to++ = chr;
+          }
+          if (my_ismbchar(read_charset,
                         (const char *)p,
                         (const char *)to))
-          continue;
-        for (i= 0; i < ml; i++)
-          PUSH(*--to);
-        chr= GET;
-      }
+            continue;
+          for (uint i= 0; i < ml; i++)
+            PUSH(*--to);
+          chr= GET;
+        }
+        else if (ml > 1)
+        {
+          // Buffer is too small, exit while loop, and reallocate.
+          PUSH(chr);
+          break;
+        }
 #endif
       *to++ = (uchar) chr;
     }
@@ -1830,7 +1843,15 @@ int READ_INFO::read_value(int delim, String *val)
   for (chr= GET; my_tospace(chr) != delim && chr != my_b_EOF;)
   {
 #ifdef USE_MB
-    if (my_mbcharlen(read_charset, chr) > 1)
+    uint ml= my_mbcharlen(read_charset, chr);
+    if (ml == 0)
+    {
+      chr= my_b_EOF;
+      val->length(0);
+      return chr;
+    }
+
+    if (ml > 1)
     {
       DBUG_PRINT("read_xml",("multi byte"));
       int i, ml= my_mbcharlen(read_charset, chr);