Bug#39828 : Autoinc wraps around when offset and increment > 1

Auto increment value wraps when performing a bulk insert with auto_increment_increment and auto_increment_offset greater than one. The fix: If overflow happened then return MAX_ULONGLONG value as an indication of overflow and check this before storing the value into the field in update_auto_increment().

Bug#39828 : Autoinc wraps around when offset and increment > 1
Auto increment value wraps when performing a bulk insert with auto_increment_increment and auto_increment_offset greater than one. The fix: If overflow happened then return MAX_ULONGLONG value as an indication of overflow and check this before storing the value into the field in update_auto_increment().
0e77c329 · Sergey Glukhov · 4096f35a · 0e77c329 · 0e77c329 · 0e77c329
Commit 0e77c329 authored Dec 13, 2010 by Sergey Glukhov
7 changed files
--- a/mysql-test/r/auto_increment.result
+++ b/mysql-test/r/auto_increment.result
@@ -476,3 +476,24 @@ SELECT a FROM t2;
 a
 2
 DROP TABLE t1, t2;
+#
+# Bug#39828 autoinc wraps around when offset and increment > 1
+#
+CREATE TABLE t1 (c1 BIGINT UNSIGNED AUTO_INCREMENT, PRIMARY KEY(c1)) engine=MyISAM;
+INSERT INTO t1 VALUES(1);
+INSERT INTO t1 VALUES (18446744073709551601);
+SET @@SESSION.AUTO_INCREMENT_INCREMENT=10;
+SELECT @@SESSION.AUTO_INCREMENT_OFFSET;
+@@SESSION.AUTO_INCREMENT_OFFSET
+1
+INSERT INTO t1 VALUES (NULL), (NULL), (NULL);
+ERROR 22003: Out of range value for column 't1' at row 167
+SELECT * FROM t1;
+c1
+1
+18446744073709551601
+18446744073709551611
+SET @@SESSION.AUTO_INCREMENT_INCREMENT=default;
+SET @@SESSION.AUTO_INCREMENT_OFFSET=default;
+DROP TABLE t1;
+End of 5.1 tests
--- a/mysql-test/suite/innodb/r/innodb-autoinc.result
+++ b/mysql-test/suite/innodb/r/innodb-autoinc.result
@@ -471,17 +471,12 @@ SHOW VARIABLES LIKE "%auto_inc%";
 Variable_name	Value
 auto_increment_increment	2
 auto_increment_offset	10
-INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
+INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
+ERROR HY000: Failed to read auto-increment value from storage engine
 SELECT * FROM t1;
 c1
 1
 18446744073709551603
-18446744073709551604
-18446744073709551606
-18446744073709551608
-18446744073709551610
-18446744073709551612
-18446744073709551614
 DROP TABLE t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=1, @@SESSION.AUTO_INCREMENT_OFFSET=1;
 SET @@INSERT_ID=1;
@@ -504,13 +499,12 @@ SHOW VARIABLES LIKE "%auto_inc%";
 Variable_name	Value
 auto_increment_increment	5
 auto_increment_offset	7
-INSERT INTO t1 VALUES (NULL),(NULL);
+INSERT INTO t1 VALUES (NULL),(NULL), (NULL);
+ERROR HY000: Failed to read auto-increment value from storage engine
 SELECT * FROM t1;
 c1
 1
 18446744073709551603
-18446744073709551607
-18446744073709551612
 DROP TABLE t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=1, @@SESSION.AUTO_INCREMENT_OFFSET=1;
 SET @@INSERT_ID=1;
@@ -572,12 +566,12 @@ SHOW VARIABLES LIKE "%auto_inc%";
 Variable_name	Value
 auto_increment_increment	65535
 auto_increment_offset	65535
-INSERT INTO t1 VALUES (NULL);
+INSERT INTO t1 VALUES (NULL),(NULL);
+ERROR 22003: Out of range value for column 't1' at row 167
 SELECT * FROM t1;
 c1
 1
 18446744073709551610
-18446744073709551615
 DROP TABLE t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=1, @@SESSION.AUTO_INCREMENT_OFFSET=1;
 SET @@INSERT_ID=1;

--- a/mysql-test/suite/innodb/t/innodb-autoinc.test
+++ b/mysql-test/suite/innodb/t/innodb-autoinc.test
@@ -291,21 +291,8 @@ INSERT INTO t1 VALUES (18446744073709551603); #-- 2^64 - 13
 SELECT * FROM t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=2, @@SESSION.AUTO_INCREMENT_OFFSET=10;
 SHOW VARIABLES LIKE "%auto_inc%";
-# This should fail because of overflow but it doesn't, it seems to be
-# a MySQL server bug. It wraps around to 0 for the last value.
-# See MySQL Bug# 39828
-#
-# Instead of wrapping around, it asserts when MySQL is compiled --with-debug
-# (see sql/handler.cc:handler::update_auto_increment()).  Don't test for
-# overflow until Bug #39828 is fixed.
-#
-# Since this asserts when compiled --with-debug, we can't properly test this
-# until Bug #39828 is fixed.  For now, this test is meaningless.
-#if Bug #39828 is fixed
-#INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
-#else
-INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
-#endif
+--error ER_AUTOINC_READ_FAILED
+INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
 SELECT * FROM t1;
 DROP TABLE t1;

@@ -323,20 +310,8 @@ INSERT INTO t1 VALUES (18446744073709551603); #-- 2^64 - 13
 SELECT * FROM t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=5, @@SESSION.AUTO_INCREMENT_OFFSET=7;
 SHOW VARIABLES LIKE "%auto_inc%";
-# This should fail because of overflow but it doesn't. It fails with
-# a duplicate entry message because of a MySQL server bug, it wraps
-# around.  See MySQL Bug# 39828, once MySQL fix the bug we can replace
-# the ER_DUP_ENTRY, 1062 below with the appropriate error message
-#
-# Since this asserts when compiled --with-debug, we can't properly test this
-# until Bug #39828 is fixed.  For now, this test is meaningless.
-#if Bug #39828 is fixed
-# Still need to fix this error code, error should mention overflow
-#-- error ER_DUP_ENTRY,1062
-#INSERT INTO t1 VALUES (NULL),(NULL), (NULL);
-#else
-INSERT INTO t1 VALUES (NULL),(NULL);
-#endif
+--error ER_AUTOINC_READ_FAILED
+INSERT INTO t1 VALUES (NULL),(NULL), (NULL);
 SELECT * FROM t1;
 DROP TABLE t1;

@@ -374,20 +349,8 @@ INSERT INTO t1 VALUES (18446744073709551610); #-- 2^64 - 2
 SELECT * FROM t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=1152921504606846976, @@SESSION.AUTO_INCREMENT_OFFSET=1152921504606846976;
 SHOW VARIABLES LIKE "%auto_inc%";
-# This should fail because of overflow but it doesn't. It wraps around
-# and the autoinc values look bogus too.
-# See MySQL Bug# 39828, once MySQL fix the bug we can enable the error
-# code expected test.
-# -- error ER_AUTOINC_READ_FAILED,1467
-#
-# Since this asserts when compiled --with-debug, we can't properly test this
-# until Bug #39828 is fixed.  For now, this test is meaningless.
-#if Bug #39828 is fixed
-#-- error ER_AUTOINC_READ_FAILED,1467
-#INSERT INTO t1 VALUES (NULL),(NULL);
-#else
-INSERT INTO t1 VALUES (NULL);
-#endif
+--error ER_WARN_DATA_OUT_OF_RANGE
+INSERT INTO t1 VALUES (NULL),(NULL);
 SELECT * FROM t1;
 DROP TABLE t1;


--- a/mysql-test/suite/innodb_plugin/r/innodb-autoinc.result
+++ b/mysql-test/suite/innodb_plugin/r/innodb-autoinc.result
@@ -471,17 +471,12 @@ SHOW VARIABLES LIKE "%auto_inc%";
 Variable_name	Value
 auto_increment_increment	2
 auto_increment_offset	10
-INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
+INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
+ERROR HY000: Failed to read auto-increment value from storage engine
 SELECT * FROM t1;
 c1
 1
 18446744073709551603
-18446744073709551604
-18446744073709551606
-18446744073709551608
-18446744073709551610
-18446744073709551612
-18446744073709551614
 DROP TABLE t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=1, @@SESSION.AUTO_INCREMENT_OFFSET=1;
 SET @@INSERT_ID=1;
@@ -504,13 +499,12 @@ SHOW VARIABLES LIKE "%auto_inc%";
 Variable_name	Value
 auto_increment_increment	5
 auto_increment_offset	7
-INSERT INTO t1 VALUES (NULL),(NULL);
+INSERT INTO t1 VALUES (NULL),(NULL), (NULL);
+ERROR HY000: Failed to read auto-increment value from storage engine
 SELECT * FROM t1;
 c1
 1
 18446744073709551603
-18446744073709551607
-18446744073709551612
 DROP TABLE t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=1, @@SESSION.AUTO_INCREMENT_OFFSET=1;
 SET @@INSERT_ID=1;
@@ -572,12 +566,12 @@ SHOW VARIABLES LIKE "%auto_inc%";
 Variable_name	Value
 auto_increment_increment	65535
 auto_increment_offset	65535
-INSERT INTO t1 VALUES (NULL);
+INSERT INTO t1 VALUES (NULL),(NULL);
+ERROR 22003: Out of range value for column 't1' at row 167
 SELECT * FROM t1;
 c1
 1
 18446744073709551610
-18446744073709551615
 DROP TABLE t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=1, @@SESSION.AUTO_INCREMENT_OFFSET=1;
 SET @@INSERT_ID=1;

--- a/mysql-test/suite/innodb_plugin/t/innodb-autoinc.test
+++ b/mysql-test/suite/innodb_plugin/t/innodb-autoinc.test
@@ -293,21 +293,8 @@ INSERT INTO t1 VALUES (18446744073709551603); #-- 2^64 - 13
 SELECT * FROM t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=2, @@SESSION.AUTO_INCREMENT_OFFSET=10;
 SHOW VARIABLES LIKE "%auto_inc%";
-# This should fail because of overflow but it doesn't, it seems to be
-# a MySQL server bug. It wraps around to 0 for the last value.
-# See MySQL Bug# 39828
-#
-# Instead of wrapping around, it asserts when MySQL is compiled --with-debug
-# (see sql/handler.cc:handler::update_auto_increment()).  Don't test for
-# overflow until Bug #39828 is fixed.
-#
-# Since this asserts when compiled --with-debug, we can't properly test this
-# until Bug #39828 is fixed.  For now, this test is meaningless.
-#if Bug #39828 is fixed
-#INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
-#else
-INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
-#endif
+--error ER_AUTOINC_READ_FAILED
+INSERT INTO t1 VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
 SELECT * FROM t1;
 DROP TABLE t1;

@@ -325,20 +312,8 @@ INSERT INTO t1 VALUES (18446744073709551603); #-- 2^64 - 13
 SELECT * FROM t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=5, @@SESSION.AUTO_INCREMENT_OFFSET=7;
 SHOW VARIABLES LIKE "%auto_inc%";
-# This should fail because of overflow but it doesn't. It fails with
-# a duplicate entry message because of a MySQL server bug, it wraps
-# around.  See MySQL Bug# 39828, once MySQL fix the bug we can replace
-# the ER_DUP_ENTRY, 1062 below with the appropriate error message
-#
-# Since this asserts when compiled --with-debug, we can't properly test this
-# until Bug #39828 is fixed.  For now, this test is meaningless.
-#if Bug #39828 is fixed
-# Still need to fix this error code, error should mention overflow
-#-- error ER_DUP_ENTRY,1062
-#INSERT INTO t1 VALUES (NULL),(NULL), (NULL);
-#else
-INSERT INTO t1 VALUES (NULL),(NULL);
-#endif
+--error ER_AUTOINC_READ_FAILED
+INSERT INTO t1 VALUES (NULL),(NULL), (NULL);
 SELECT * FROM t1;
 DROP TABLE t1;

@@ -376,20 +351,8 @@ INSERT INTO t1 VALUES (18446744073709551610); #-- 2^64 - 2
 SELECT * FROM t1;
 SET @@SESSION.AUTO_INCREMENT_INCREMENT=1152921504606846976, @@SESSION.AUTO_INCREMENT_OFFSET=1152921504606846976;
 SHOW VARIABLES LIKE "%auto_inc%";
-# This should fail because of overflow but it doesn't. It wraps around
-# and the autoinc values look bogus too.
-# See MySQL Bug# 39828, once MySQL fix the bug we can enable the error
-# code expected test.
-# -- error ER_AUTOINC_READ_FAILED,1467
-#
-# Since this asserts when compiled --with-debug, we can't properly test this
-# until Bug #39828 is fixed.  For now, this test is meaningless.
-#if Bug #39828 is fixed
-#-- error ER_AUTOINC_READ_FAILED,1467
-#INSERT INTO t1 VALUES (NULL),(NULL);
-#else
-INSERT INTO t1 VALUES (NULL);
-#endif
+--error ER_WARN_DATA_OUT_OF_RANGE
+INSERT INTO t1 VALUES (NULL),(NULL);
 SELECT * FROM t1;
 DROP TABLE t1;


--- a/mysql-test/t/auto_increment.test
+++ b/mysql-test/t/auto_increment.test
@@ -342,3 +342,24 @@ SELECT a FROM t2;

 DROP TABLE t1, t2;

+--echo #
+--echo # Bug#39828 autoinc wraps around when offset and increment > 1
+--echo #
+
+CREATE TABLE t1 (c1 BIGINT UNSIGNED AUTO_INCREMENT, PRIMARY KEY(c1)) engine=MyISAM;
+INSERT INTO t1 VALUES(1);
+INSERT INTO t1 VALUES (18446744073709551601);
+
+SET @@SESSION.AUTO_INCREMENT_INCREMENT=10;
+
+SELECT @@SESSION.AUTO_INCREMENT_OFFSET;
+--error ER_WARN_DATA_OUT_OF_RANGE
+INSERT INTO t1 VALUES (NULL), (NULL), (NULL);
+SELECT * FROM t1;
+
+SET @@SESSION.AUTO_INCREMENT_INCREMENT=default;
+SET @@SESSION.AUTO_INCREMENT_OFFSET=default;
+
+DROP TABLE t1;
+
+--echo End of 5.1 tests
--- a/sql/handler.cc
+++ b/sql/handler.cc
@@ -2166,7 +2166,8 @@ int handler::read_first_row(uchar * buf, uint primary_key)
  computes the lowest number
  - strictly greater than "nr"
  - of the form: auto_increment_offset + N * auto_increment_increment
-
+  If overflow happened then return MAX_ULONGLONG value as an
+  indication of overflow.
  In most cases increment= offset= 1, in which case we get:
  @verbatim 1,2,3,4,5,... @endverbatim
    If increment=10 and offset=5 and previous number is 1, we get:
@@ -2175,13 +2176,23 @@ int handler::read_first_row(uchar * buf, uint primary_key)
 inline ulonglong
 compute_next_insert_id(ulonglong nr,struct system_variables *variables)
 {
+  const ulonglong save_nr= nr;
+
  if (variables->auto_increment_increment == 1)
-    return (nr+1); // optimization of the formula below
-  nr= (((nr+ variables->auto_increment_increment -
-         variables->auto_increment_offset)) /
-       (ulonglong) variables->auto_increment_increment);
-  return (nr* (ulonglong) variables->auto_increment_increment +
-          variables->auto_increment_offset);
+    nr= nr + 1; // optimization of the formula below
+  else
+  {
+    nr= (((nr+ variables->auto_increment_increment -
+           variables->auto_increment_offset)) /
+         (ulonglong) variables->auto_increment_increment);
+    nr= (nr* (ulonglong) variables->auto_increment_increment +
+         variables->auto_increment_offset);
+  }
+
+  if (unlikely(nr <= save_nr))
+    return ULONGLONG_MAX;
+
+  return nr;
 }


@@ -2392,7 +2403,7 @@ int handler::update_auto_increment()
                         variables->auto_increment_increment,
                         nb_desired_values, &nr,
                         &nb_reserved_values);
-      if (nr == ~(ulonglong) 0)
+      if (nr == ULONGLONG_MAX)
        DBUG_RETURN(HA_ERR_AUTOINC_READ_FAILED);  // Mark failure

      /*
@@ -2423,6 +2434,9 @@ int handler::update_auto_increment()
    }
  }

+  if (unlikely(nr == ULONGLONG_MAX))
+      DBUG_RETURN(HA_ERR_AUTOINC_ERANGE); 
+
  DBUG_PRINT("info",("auto_increment: %lu", (ulong) nr));

  if (unlikely(table->next_number_field->store((longlong) nr, TRUE)))