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Commit 3f641968 authored by Sergey Vojtovich's avatar Sergey Vojtovich
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BUG#51866 - crash with repair by sort and fulltext keys 

Repairing MyISAM table with fulltext indexes and low
myisam_sort_buffer_size may crash the server.

Estimation of number of index entries was done incorrectly,
causing further assertion failure or server crash.

Docs note: min value for myisam_sort_buffer_size has been
changed from 4 to 4096.
parent 9ecdd588
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Showing with 70 additions and 33 deletions
mysql-test/r/fulltext.result
View file @ 3f641968
......@@ -631,4 +631,17 @@ CREATE TABLE t1(a CHAR(1),FULLTEXT(a));
SELECT 1 FROM t1 WHERE MATCH(a) AGAINST ('') AND ROW(a,a) > ROW(1,1);
1
DROP TABLE t1;
#
# BUG#51866 - crash with repair by sort and fulltext keys
#
CREATE TABLE t1(a CHAR(4), FULLTEXT(a));
INSERT INTO t1 VALUES('aaaa');
SET myisam_sort_buffer_size=4;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '4'
REPAIR TABLE t1;
Table Op Msg_type Msg_text
test.t1 repair status OK
SET myisam_sort_buffer_size=@@global.myisam_sort_buffer_size;
DROP TABLE t1;
End of 5.1 tests
mysql-test/r/myisam.result
View file @ 3f641968
......@@ -2313,6 +2313,8 @@ INSERT INTO t1 SELECT a+1280,b FROM t1;
INSERT INTO t1 SELECT a+2560,b FROM t1;
INSERT INTO t1 SELECT a+5120,b FROM t1;
SET myisam_sort_buffer_size=4;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '4'
REPAIR TABLE t1;
Table Op Msg_type Msg_text
test.t1 repair error myisam_sort_buffer_size is too small
......@@ -2363,6 +2365,8 @@ CREATE TABLE t1(a CHAR(255), KEY(a));
SELECT * FROM t1, t1 AS a1;
a a
SET myisam_sort_buffer_size=4;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '4'
INSERT INTO t1 VALUES
('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),
('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),('0'),
......
mysql-test/r/variables.result
View file @ 3f641968
......@@ -523,6 +523,8 @@ select @@max_user_connections;
100
set global max_write_lock_count=100;
set myisam_sort_buffer_size=100;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '100'
set global net_buffer_length=100;
Warnings:
Warning 1292 Truncated incorrect net_buffer_length value: '100'
......
mysql-test/suite/sys_vars/r/myisam_sort_buffer_size_basic_32.result
View file @ 3f641968
......@@ -8,11 +8,15 @@ SELECT @start_session_value;
8388608
'#--------------------FN_DYNVARS_005_01-------------------------#'
SET @@global.myisam_sort_buffer_size = 100;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '100'
SET @@global.myisam_sort_buffer_size = DEFAULT;
SELECT @@global.myisam_sort_buffer_size ;
@@global.myisam_sort_buffer_size
8388608
SET @@session.myisam_sort_buffer_size = 200;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '200'
SET @@session.myisam_sort_buffer_size = DEFAULT;
SELECT @@session.myisam_sort_buffer_size ;
@@session.myisam_sort_buffer_size
......@@ -28,9 +32,11 @@ SELECT @@session.myisam_sort_buffer_size = 8388608;
1
'#--------------------FN_DYNVARS_005_03-------------------------#'
SET @@global.myisam_sort_buffer_size = 4;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '4'
SELECT @@global.myisam_sort_buffer_size ;
@@global.myisam_sort_buffer_size
4
4096
SET @@global.myisam_sort_buffer_size = 4294967295;
SELECT @@global.myisam_sort_buffer_size ;
@@global.myisam_sort_buffer_size
......@@ -41,9 +47,11 @@ SELECT @@global.myisam_sort_buffer_size ;
655354
'#--------------------FN_DYNVARS_005_04-------------------------#'
SET @@session.myisam_sort_buffer_size = 4;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '4'
SELECT @@session.myisam_sort_buffer_size ;
@@session.myisam_sort_buffer_size
4
4096
SET @@session.myisam_sort_buffer_size = 4294967295;
SELECT @@session.myisam_sort_buffer_size ;
@@session.myisam_sort_buffer_size
......@@ -58,13 +66,13 @@ Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '0'
SELECT @@global.myisam_sort_buffer_size ;
@@global.myisam_sort_buffer_size
4
4096
SET @@global.myisam_sort_buffer_size = -1024;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '-1024'
SELECT @@global.myisam_sort_buffer_size ;
@@global.myisam_sort_buffer_size
4
4096
SET @@global.myisam_sort_buffer_size = 429496729533;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '429496729533'
......@@ -101,28 +109,28 @@ Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '0'
SELECT @@session.myisam_sort_buffer_size ;
@@session.myisam_sort_buffer_size
4
4096
SET @@session.myisam_sort_buffer_size = -2;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '-2'
SELECT @@session.myisam_sort_buffer_size ;
@@session.myisam_sort_buffer_size
4
4096
SET @@session.myisam_sort_buffer_size = 65530.34.;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.' at line 1
SELECT @@session.myisam_sort_buffer_size ;
@@session.myisam_sort_buffer_size
4
4096
SET @@session.myisam_sort_buffer_size = test;
ERROR 42000: Incorrect argument type to variable 'myisam_sort_buffer_size'
SELECT @@session.myisam_sort_buffer_size ;
@@session.myisam_sort_buffer_size
4
4096
SET @@session.myisam_sort_buffer_size = "test";
ERROR 42000: Incorrect argument type to variable 'myisam_sort_buffer_size'
SELECT @@session.myisam_sort_buffer_size ;
@@session.myisam_sort_buffer_size
4
4096
'#------------------FN_DYNVARS_005_06-----------------------#'
SELECT @@global.myisam_sort_buffer_size = VARIABLE_VALUE
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
......@@ -141,20 +149,24 @@ Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '1'
SELECT @@global.myisam_sort_buffer_size ;
@@global.myisam_sort_buffer_size
4
4096
SET @@global.myisam_sort_buffer_size = FALSE;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '0'
SELECT @@global.myisam_sort_buffer_size ;
@@global.myisam_sort_buffer_size
4
4096
'#---------------------FN_DYNVARS_001_09----------------------#'
SET @@global.myisam_sort_buffer_size = 10;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '10'
SELECT @@myisam_sort_buffer_size = @@global.myisam_sort_buffer_size ;
@@myisam_sort_buffer_size = @@global.myisam_sort_buffer_size
0
1
'#---------------------FN_DYNVARS_001_10----------------------#'
SET @@myisam_sort_buffer_size = 100;
Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '100'
SELECT @@myisam_sort_buffer_size = @@local.myisam_sort_buffer_size ;
@@myisam_sort_buffer_size = @@local.myisam_sort_buffer_size
1
......@@ -167,7 +179,7 @@ Warnings:
Warning 1292 Truncated incorrect myisam_sort_buffer_size value: '1'
SELECT @@myisam_sort_buffer_size ;
@@myisam_sort_buffer_size
4
4096
SELECT local.myisam_sort_buffer_size ;
ERROR 42S02: Unknown table 'local' in field list
SELECT session.myisam_sort_buffer_size ;
......
mysql-test/t/fulltext.test
View file @ 3f641968
......@@ -575,5 +575,14 @@ CREATE TABLE t1(a CHAR(1),FULLTEXT(a));
SELECT 1 FROM t1 WHERE MATCH(a) AGAINST ('') AND ROW(a,a) > ROW(1,1);
DROP TABLE t1;
--echo #
--echo # BUG#51866 - crash with repair by sort and fulltext keys
--echo #
CREATE TABLE t1(a CHAR(4), FULLTEXT(a));
INSERT INTO t1 VALUES('aaaa');
SET myisam_sort_buffer_size=4;
REPAIR TABLE t1;
SET myisam_sort_buffer_size=@@global.myisam_sort_buffer_size;
DROP TABLE t1;
--echo End of 5.1 tests
sql/mysqld.cc
View file @ 3f641968
......@@ -6858,7 +6858,7 @@ The minimum value for this variable is 4096.",
"The buffer that is allocated when sorting the index when doing a REPAIR or when creating indexes with CREATE INDEX or ALTER TABLE.",
(uchar**) &global_system_variables.myisam_sort_buff_size,
(uchar**) &max_system_variables.myisam_sort_buff_size, 0,
GET_ULONG, REQUIRED_ARG, 8192*1024, 4, ~0L, 0, 1, 0},
GET_ULONG, REQUIRED_ARG, 8192 * 1024, 4096, ~0L, 0, 1, 0},
{"myisam_use_mmap", OPT_MYISAM_USE_MMAP,
"Use memory mapping for reading and writing MyISAM tables.",
(uchar**) &opt_myisam_use_mmap,
......
storage/myisam/mi_check.c
View file @ 3f641968
......@@ -2396,10 +2396,8 @@ int mi_repair_by_sort(MI_CHECK *param, register MI_INFO *info,
/*
fulltext indexes may have much more entries than the
number of rows in the table. We estimate the number here.
Note, built-in parser is always nr. 0 - see ftparser_call_initializer()
*/
if (sort_param.keyinfo->ftkey_nr == 0)
if (sort_param.keyinfo->parser == &ft_default_parser)
{
/*
for built-in parser the number of generated index entries
......@@ -2416,8 +2414,9 @@ int mi_repair_by_sort(MI_CHECK *param, register MI_INFO *info,
so, we'll use all the sort memory and start from ~10 buffpeks.
(see _create_index_by_sort)
*/
sort_info.max_records=
10*param->sort_buffer_length/sort_param.key_length;
sort_info.max_records= 10 *
max(param->sort_buffer_length, MIN_SORT_BUFFER) /
sort_param.key_length;
}
sort_param.key_read=sort_ft_key_read;
......
storage/myisam/sort.c
View file @ 3f641968
......@@ -28,13 +28,11 @@
/* static variables */
#undef MIN_SORT_MEMORY
#undef MYF_RW
#undef DISK_BUFFER_SIZE
#define MERGEBUFF 15
#define MERGEBUFF2 31
#define MIN_SORT_MEMORY (4096-MALLOC_OVERHEAD)
#define MYF_RW MYF(MY_NABP | MY_WME | MY_WAIT_IF_FULL)
#define DISK_BUFFER_SIZE (IO_SIZE*16)
......@@ -131,12 +129,12 @@ int _create_index_by_sort(MI_SORT_PARAM *info,my_bool no_messages,
sort_keys= (uchar **) NULL; error= 1;
maxbuffer=1;
memavl=max(sortbuff_size,MIN_SORT_MEMORY);
memavl= max(sortbuff_size, MIN_SORT_BUFFER);
records= info->sort_info->max_records;
sort_length= info->key_length;
LINT_INIT(keys);
while (memavl >= MIN_SORT_MEMORY)
while (memavl >= MIN_SORT_BUFFER)
{
if ((records < UINT_MAX32) &&
((my_off_t) (records + 1) *
......@@ -171,10 +169,10 @@ int _create_index_by_sort(MI_SORT_PARAM *info,my_bool no_messages,
break;
}
old_memavl=memavl;
if ((memavl=memavl/4*3) < MIN_SORT_MEMORY && old_memavl > MIN_SORT_MEMORY)
memavl=MIN_SORT_MEMORY;
if ((memavl= memavl/4*3) < MIN_SORT_BUFFER && old_memavl > MIN_SORT_BUFFER)
memavl= MIN_SORT_BUFFER;
}
if (memavl < MIN_SORT_MEMORY)
if (memavl < MIN_SORT_BUFFER)
{
mi_check_print_error(info->sort_info->param,"MyISAM sort buffer too small"); /* purecov: tested */
goto err; /* purecov: tested */
......@@ -348,12 +346,12 @@ pthread_handler_t thr_find_all_keys(void *arg)
bzero((char*) &sort_param->unique, sizeof(sort_param->unique));
sort_keys= (uchar **) NULL;
memavl= max(sort_param->sortbuff_size, MIN_SORT_MEMORY);
memavl= max(sort_param->sortbuff_size, MIN_SORT_BUFFER);
idx= (uint)sort_param->sort_info->max_records;
sort_length= sort_param->key_length;
maxbuffer= 1;
while (memavl >= MIN_SORT_MEMORY)
while (memavl >= MIN_SORT_BUFFER)
{
if ((my_off_t) (idx+1)*(sort_length+sizeof(char*)) <=
(my_off_t) memavl)
......@@ -391,11 +389,11 @@ pthread_handler_t thr_find_all_keys(void *arg)
break;
}
old_memavl= memavl;
if ((memavl= memavl/4*3) < MIN_SORT_MEMORY &&
old_memavl > MIN_SORT_MEMORY)
memavl= MIN_SORT_MEMORY;
if ((memavl= memavl / 4 * 3) < MIN_SORT_BUFFER &&
old_memavl > MIN_SORT_BUFFER)
memavl= MIN_SORT_BUFFER;
}
if (memavl < MIN_SORT_MEMORY)
if (memavl < MIN_SORT_BUFFER)
{
mi_check_print_error(sort_param->sort_info->param,
"MyISAM sort buffer too small");
......@@ -569,7 +567,7 @@ int thr_write_keys(MI_SORT_PARAM *sort_param)
if (!mergebuf)
{
length=param->sort_buffer_length;
while (length >= MIN_SORT_MEMORY)
while (length >= MIN_SORT_BUFFER)
{
if ((mergebuf= my_malloc(length, MYF(0))))
break;
......
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