bk commit into 5.0 tree (evgen:1.2385) BUG#25172

[eugene]

Below is the list of changes that have just been committed into a local
5.0 repository of evgen. When evgen does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
For information on how to access the public repository
see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html

ChangeSet@stripped, 2007-01-19 18:34:09+03:00, evgen@stripped +6 -0
  Bug#25172: Not checked buffer size leads to a server crash.
  
  After fix for bug#21798 JOIN stores the pointer to the buffer for sorting
  fields. It is used while sorting for grouping and for ordering. If ORDER BY
  clause has more elements then the GROUP BY clause then a memory overrun occurs.
  
  Now the length of the ORDER BY list is always passed to the 
  make_unireg_sortorder() function and it allocates buffer big enough to be
  used for bigger list.

  mysql-test/r/select.result@stripped, 2007-01-19 18:33:41+03:00, evgen@stripped +8 -0
    Added a test case for bug#25172: Not checked buffer size leads to a server crash.

  mysql-test/t/select.test@stripped, 2007-01-19 18:33:44+03:00, evgen@stripped +11 -0
    Added a test case for bug#25172: Not checked buffer size leads to a server crash.

  sql/sql_delete.cc@stripped, 2007-01-19 18:33:25+03:00, evgen@stripped +1 -1
    Bug#25172: Not checked buffer size leads to a server crash.
    Length parameter is initialized to 0 for the make_unireg_sortorder() function.

  sql/sql_select.cc@stripped, 2007-01-19 18:33:29+03:00, evgen@stripped +8 -4
    Bug#25172: Not checked buffer size leads to a server crash.
    Now the length of the ORDER BY list is always passed to the 
    make_unireg_sortorder() function and it allocates buffer big enough to be
    used for bigger list.

  sql/sql_table.cc@stripped, 2007-01-19 18:33:37+03:00, evgen@stripped +1 -1
    Bug#25172: Not checked buffer size leads to a server crash.
    Length parameter is initialized to 0 for the make_unireg_sortorder() function.

  sql/sql_update.cc@stripped, 2007-01-19 18:33:40+03:00, evgen@stripped +1 -1
    Bug#25172: Not checked buffer size leads to a server crash.
    Length parameter is initialized to 0 for the make_unireg_sortorder() function.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	evgen
# Host:	moonbone.local
# Root:	/mnt/gentoo64/work/25172-bug-5.0-opt-mysql

--- 1.189/sql/sql_delete.cc	2007-01-12 16:40:31 +03:00
+++ 1.190/sql/sql_delete.cc	2007-01-19 18:33:25 +03:00
@@ -142,7 +142,7 @@
 
   if (order && order->elements)
   {
-    uint         length;
+    uint         length= 0;
     SORT_FIELD  *sortorder;
     TABLE_LIST   tables;
     List<Item>   fields;

--- 1.480/sql/sql_select.cc	2007-01-15 22:40:19 +03:00
+++ 1.481/sql/sql_select.cc	2007-01-19 18:33:29 +03:00
@@ -12262,7 +12262,7 @@
 create_sort_index(THD *thd, JOIN *join, ORDER *order,
 		  ha_rows filesort_limit, ha_rows select_limit)
 {
-  uint length;
+  uint length= 0;
   ha_rows examined_rows;
   TABLE *table;
   SQL_SELECT *select;
@@ -12283,8 +12283,10 @@
        !(join->select_options & SELECT_BIG_RESULT)) &&
       test_if_skip_sort_order(tab,order,select_limit,0))
     DBUG_RETURN(0);
+  for (ORDER *ord= join->order; ord; ord= ord->next)
+    length++;
   if (!(join->sortorder= 
-        make_unireg_sortorder(order,&length,join->sortorder)))
+        make_unireg_sortorder(order, &length, join->sortorder)))
     goto err;				/* purecov: inspected */
 
   table->sort.io_cache=(IO_CACHE*) my_malloc(sizeof(IO_CACHE),
@@ -12690,8 +12692,10 @@
   for (ORDER *tmp = order; tmp; tmp=tmp->next)
     count++;
   if (!sortorder)
-    sortorder= (SORT_FIELD*) sql_alloc(sizeof(SORT_FIELD)*(count+1));
-  pos=sort=sortorder;
+    sortorder= (SORT_FIELD*) sql_alloc(sizeof(SORT_FIELD) *
+                                       (max(count, *length) + 1));
+  pos= sort= sortorder;
+
   if (!pos)
     return 0;
 

--- 1.329/sql/sql_table.cc	2006-12-23 22:04:27 +03:00
+++ 1.330/sql/sql_table.cc	2007-01-19 18:33:37 +03:00
@@ -3883,7 +3883,7 @@
   Copy_field *copy,*copy_end;
   ulong found_count,delete_count;
   THD *thd= current_thd;
-  uint length;
+  uint length= 0;
   SORT_FIELD *sortorder;
   READ_RECORD info;
   TABLE_LIST   tables;

--- 1.207/sql/sql_update.cc	2006-12-30 23:02:07 +03:00
+++ 1.208/sql/sql_update.cc	2007-01-19 18:33:40 +03:00
@@ -304,7 +304,7 @@
 	Doing an ORDER BY;  Let filesort find and sort the rows we are going
 	to update
       */
-      uint         length;
+      uint         length= 0;
       SORT_FIELD  *sortorder;
       ha_rows examined_rows;
 

--- 1.143/mysql-test/r/select.result	2006-10-19 16:37:44 +04:00
+++ 1.144/mysql-test/r/select.result	2007-01-19 18:33:41 +03:00
@@ -3611,3 +3611,11 @@
 1	SIMPLE	t2	range	si,ai	si	5	NULL	2	Using where
 1	SIMPLE	t3	eq_ref	PRIMARY,ci	PRIMARY	4	test.t2.a	1	Using where
 DROP TABLE t1,t2,t3;
+CREATE TABLE t1 ( f1 int primary key, f2 int, f3 int, f4 int, f5 int, f6 int, checked_out
int);
+CREATE TABLE t2 ( f11 int PRIMARY KEY );
+INSERT INTO t1 VALUES (1,1,1,0,0,0,0),(2,1,1,3,8,1,0),(3,1,1,4,12,1,0);
+INSERT INTO t2 VALUES (62);
+SELECT * FROM t1 LEFT JOIN t2 ON f11 = t1.checked_out GROUP BY f1 ORDER BY f2, f3, f4, f5
LIMIT 0, 1;
+f1	f2	f3	f4	f5	f6	checked_out	f11
+1	1	1	0	0	0	0	NULL
+DROP TABLE t1, t2;

--- 1.117/mysql-test/t/select.test	2006-11-20 23:41:41 +03:00
+++ 1.118/mysql-test/t/select.test	2007-01-19 18:33:44 +03:00
@@ -3092,3 +3092,14 @@
         t3.c IN ('bb','ee');
 
 DROP TABLE t1,t2,t3;
+ 
+#
+# Bug#25172: Not checked buffer size leads to a server crash
+#
+CREATE TABLE t1 ( f1 int primary key, f2 int, f3 int, f4 int, f5 int, f6 int, checked_out
int);
+CREATE TABLE t2 ( f11 int PRIMARY KEY );
+INSERT INTO t1 VALUES (1,1,1,0,0,0,0),(2,1,1,3,8,1,0),(3,1,1,4,12,1,0);
+INSERT INTO t2 VALUES (62);
+SELECT * FROM t1 LEFT JOIN t2 ON f11 = t1.checked_out GROUP BY f1 ORDER BY f2, f3, f4, f5
LIMIT 0, 1;
+DROP TABLE t1, t2;
+