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BUG#24490 (segfault inside unpack_row at Field_bit_as_char::set_default()):

Browse source 
Field_bit::set_default() did not check the bit_len, hence used the undefined
bit_ptr, causing a crash. The patch adds a check that bit_len > 0 before
following the bit_ptr.


mysql-test/extra/rpl_tests/rpl_row_tabledefs.test:
  Doing select using ORDER BY to prevent table-internal order from
  affecting the result.
mysql-test/r/rpl_row_tabledefs_2myisam.result:
  Result change
mysql-test/r/rpl_row_tabledefs_3innodb.result:
  Result change
sql/field.cc:
  Checking bit_len before following the bit_ptr, since bit_ptr has no
  sensible value in the case that bit_len == 0.
sql/field.h:
  Field_bit::set_default() used the bit_ptr, but it is undefined,
  hence causing a crash.  In reality, the hierarchy order is not correct
  so added a TODO comment about refactoring.
sql/log_event.cc:
  Code was manipulating bits for a FIELD_TYPE_BIT field without checking
  if the bit_len was > 0, hence using an undefined bit_ptr when the
  class was actually a Field_bit_as_char.
mysql-test/t/rpl_row_tabledefs_3innodb-slave.opt:
  New BitKeeper file ``mysql-test/t/rpl_row_tabledefs_3innodb-slave.opt''
This commit is contained in:
unknown 2006-12-05 10:46:03 +01:00
commit 4924c61999
7 changed files with 94 additions and 80 deletions
Download patch file Download diff file Expand all files Collapse all files

40
mysql-test/extra/rpl_tests/rpl_row_tabledefs.test
View file

@ -80,28 +80,28 @@ INSERT INTO t1_bit VALUES (1,2);
INSERT INTO t1_bit VALUES (2,5);
INSERT INTO t1_char VALUES (1,2);
INSERT INTO t1_char VALUES (2,5);
SELECT * FROM t1_int;
SELECT * FROM t1_bit;
SELECT * FROM t1_char;
SELECT * FROM t1_int ORDER BY a;
SELECT * FROM t1_bit ORDER BY a;
SELECT * FROM t1_char ORDER BY a;
--echo **** On Slave ****
sync_slave_with_master;
SELECT a,b,x FROM t1_int;
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit;
SELECT a,b,x FROM t1_char;
SELECT a,b,x FROM t1_int ORDER BY a;
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit ORDER BY a;
SELECT a,b,x FROM t1_char ORDER BY a;
--echo **** On Master ****
connection master;
UPDATE t1_int SET b=2*b WHERE a=2;
UPDATE t1_char SET b=2*b WHERE a=2;
UPDATE t1_bit SET b=2*b WHERE a=2;
SELECT * FROM t1_int;
SELECT * FROM t1_bit;
SELECT * FROM t1_char;
SELECT * FROM t1_int ORDER BY a;
SELECT * FROM t1_bit ORDER BY a;
SELECT * FROM t1_char ORDER BY a;
--echo **** On Slave ****
sync_slave_with_master;
SELECT a,b,x FROM t1_int;
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit;
SELECT a,b,x FROM t1_char;
SELECT a,b,x FROM t1_int ORDER BY a;
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit ORDER BY a;
SELECT a,b,x FROM t1_char ORDER BY a;
# Each of these inserts should generate an error and stop the slave
@ -188,11 +188,11 @@ sync_slave_with_master;
connection master;
INSERT INTO t7 VALUES (1),(2),(3);
INSERT INTO t8 VALUES (1),(2),(3);
SELECT * FROM t7;
SELECT * FROM t8;
SELECT * FROM t7 ORDER BY a;
SELECT * FROM t8 ORDER BY a;
sync_slave_with_master;
SELECT * FROM t7;
SELECT * FROM t8;
SELECT * FROM t7 ORDER BY a;
SELECT * FROM t8 ORDER BY a;
# We will now try to update and then delete a row on the master where
# the extra field on the slave does not have a default value. This
@ -216,20 +216,20 @@ INSERT INTO t1_nodef VALUES (2,4,6);
--echo **** On Master ****
connection master;
UPDATE t1_nodef SET b=2*b WHERE a=1;
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
--echo **** On Slave ****
sync_slave_with_master;
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
--echo **** On Master ****
connection master;
DELETE FROM t1_nodef WHERE a=2;
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
--echo **** On Slave ****
sync_slave_with_master;
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
--echo **** Cleanup ****
connection master;

52
mysql-test/r/rpl_row_tabledefs_2myisam.result
View file

@ -46,60 +46,60 @@ INSERT INTO t1_bit VALUES (1,2);
INSERT INTO t1_bit VALUES (2,5);
INSERT INTO t1_char VALUES (1,2);
INSERT INTO t1_char VALUES (2,5);
SELECT * FROM t1_int;
SELECT * FROM t1_int ORDER BY a;
a b
1 2
2 5
SELECT * FROM t1_bit;
SELECT * FROM t1_bit ORDER BY a;
a b
1 2
2 5
SELECT * FROM t1_char;
SELECT * FROM t1_char ORDER BY a;
a b
1 2
2 5
**** On Slave ****
SELECT a,b,x FROM t1_int;
SELECT a,b,x FROM t1_int ORDER BY a;
a b x
2 5 4711
1 2 42
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit;
2 5 4711
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit ORDER BY a;
a b HEX(x) HEX(y) HEX(z)
2 5 5 1C 1
1 2 3 15 2
SELECT a,b,x FROM t1_char;
2 5 5 1C 1
SELECT a,b,x FROM t1_char ORDER BY a;
a b x
2 5 Foo is a bar
1 2 Just a test
2 5 Foo is a bar
**** On Master ****
UPDATE t1_int SET b=2*b WHERE a=2;
UPDATE t1_char SET b=2*b WHERE a=2;
UPDATE t1_bit SET b=2*b WHERE a=2;
SELECT * FROM t1_int;
SELECT * FROM t1_int ORDER BY a;
a b
1 2
2 10
SELECT * FROM t1_bit;
SELECT * FROM t1_bit ORDER BY a;
a b
1 2
2 10
SELECT * FROM t1_char;
SELECT * FROM t1_char ORDER BY a;
a b
1 2
2 10
**** On Slave ****
SELECT a,b,x FROM t1_int;
SELECT a,b,x FROM t1_int ORDER BY a;
a b x
2 10 4711
1 2 42
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit;
2 10 4711
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit ORDER BY a;
a b HEX(x) HEX(y) HEX(z)
2 10 5 1C 1
1 2 3 15 2
SELECT a,b,x FROM t1_char;
2 10 5 1C 1
SELECT a,b,x FROM t1_char ORDER BY a;
a b x
2 10 Foo is a bar
1 2 Just a test
2 10 Foo is a bar
INSERT INTO t9 VALUES (2);
INSERT INTO t1_nodef VALUES (1,2);
SHOW SLAVE STATUS;
@ -327,22 +327,22 @@ Master_SSL_Key
Seconds_Behind_Master #
INSERT INTO t7 VALUES (1),(2),(3);
INSERT INTO t8 VALUES (1),(2),(3);
SELECT * FROM t7;
SELECT * FROM t7 ORDER BY a;
a
1
2
3
SELECT * FROM t8;
SELECT * FROM t8 ORDER BY a;
a
1
2
3
SELECT * FROM t7;
SELECT * FROM t7 ORDER BY a;
a e1 e2 e3 e4 e5 e6 e7 e8
1 NULL NULL NULL NULL NULL NULL NULL NULL
2 NULL NULL NULL NULL NULL NULL NULL NULL
3 NULL NULL NULL NULL NULL NULL NULL NULL
SELECT * FROM t8;
SELECT * FROM t8 ORDER BY a;
a e1 e2 e3 e4 e5 e6 e7 e8
1 0 0 0 0 0 0 0 0
2 0 0 0 0 0 0 0 0
@ -358,22 +358,22 @@ INSERT INTO t1_nodef VALUES (1,2,3);
INSERT INTO t1_nodef VALUES (2,4,6);
**** On Master ****
UPDATE t1_nodef SET b=2*b WHERE a=1;
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
a b
1 4
2 4
**** On Slave ****
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
a b x
1 4 3
2 4 6
**** On Master ****
DELETE FROM t1_nodef WHERE a=2;
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
a b
1 4
**** On Slave ****
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
a b x
1 4 3
**** Cleanup ****

52
mysql-test/r/rpl_row_tabledefs_3innodb.result
View file

@ -46,60 +46,60 @@ INSERT INTO t1_bit VALUES (1,2);
INSERT INTO t1_bit VALUES (2,5);
INSERT INTO t1_char VALUES (1,2);
INSERT INTO t1_char VALUES (2,5);
SELECT * FROM t1_int;
SELECT * FROM t1_int ORDER BY a;
a b
1 2
2 5
SELECT * FROM t1_bit;
SELECT * FROM t1_bit ORDER BY a;
a b
1 2
2 5
SELECT * FROM t1_char;
SELECT * FROM t1_char ORDER BY a;
a b
1 2
2 5
**** On Slave ****
SELECT a,b,x FROM t1_int;
SELECT a,b,x FROM t1_int ORDER BY a;
a b x
2 5 4711
1 2 42
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit;
2 5 4711
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit ORDER BY a;
a b HEX(x) HEX(y) HEX(z)
2 5 5 1C 1
1 2 3 15 2
SELECT a,b,x FROM t1_char;
2 5 5 1C 1
SELECT a,b,x FROM t1_char ORDER BY a;
a b x
2 5 Foo is a bar
1 2 Just a test
2 5 Foo is a bar
**** On Master ****
UPDATE t1_int SET b=2*b WHERE a=2;
UPDATE t1_char SET b=2*b WHERE a=2;
UPDATE t1_bit SET b=2*b WHERE a=2;
SELECT * FROM t1_int;
SELECT * FROM t1_int ORDER BY a;
a b
1 2
2 10
SELECT * FROM t1_bit;
SELECT * FROM t1_bit ORDER BY a;
a b
1 2
2 10
SELECT * FROM t1_char;
SELECT * FROM t1_char ORDER BY a;
a b
1 2
2 10
**** On Slave ****
SELECT a,b,x FROM t1_int;
SELECT a,b,x FROM t1_int ORDER BY a;
a b x
2 10 4711
1 2 42
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit;
2 10 4711
SELECT a,b,HEX(x),HEX(y),HEX(z) FROM t1_bit ORDER BY a;
a b HEX(x) HEX(y) HEX(z)
2 10 5 1C 1
1 2 3 15 2
SELECT a,b,x FROM t1_char;
2 10 5 1C 1
SELECT a,b,x FROM t1_char ORDER BY a;
a b x
2 10 Foo is a bar
1 2 Just a test
2 10 Foo is a bar
INSERT INTO t9 VALUES (2);
INSERT INTO t1_nodef VALUES (1,2);
SHOW SLAVE STATUS;
@ -327,22 +327,22 @@ Master_SSL_Key
Seconds_Behind_Master #
INSERT INTO t7 VALUES (1),(2),(3);
INSERT INTO t8 VALUES (1),(2),(3);
SELECT * FROM t7;
SELECT * FROM t7 ORDER BY a;
a
1
2
3
SELECT * FROM t8;
SELECT * FROM t8 ORDER BY a;
a
1
2
3
SELECT * FROM t7;
SELECT * FROM t7 ORDER BY a;
a e1 e2 e3 e4 e5 e6 e7 e8
1 NULL NULL NULL NULL NULL NULL NULL NULL
2 NULL NULL NULL NULL NULL NULL NULL NULL
3 NULL NULL NULL NULL NULL NULL NULL NULL
SELECT * FROM t8;
SELECT * FROM t8 ORDER BY a;
a e1 e2 e3 e4 e5 e6 e7 e8
1 0 0 0 0 0 0 0 0
2 0 0 0 0 0 0 0 0
@ -358,22 +358,22 @@ INSERT INTO t1_nodef VALUES (1,2,3);
INSERT INTO t1_nodef VALUES (2,4,6);
**** On Master ****
UPDATE t1_nodef SET b=2*b WHERE a=1;
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
a b
1 4
2 4
**** On Slave ****
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
a b x
1 4 3
2 4 6
**** On Master ****
DELETE FROM t1_nodef WHERE a=2;
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
a b
1 4
**** On Slave ****
SELECT * FROM t1_nodef;
SELECT * FROM t1_nodef ORDER BY a;
a b x
1 4 3
**** Cleanup ****

1
mysql-test/t/rpl_row_tabledefs_3innodb-slave.opt Normal file
View file

@ -0,0 +1 @@
--innodb

9
sql/field.cc
View file

@ -8455,9 +8455,12 @@ const char *Field_bit::unpack(char *to, const char *from)
void Field_bit::set_default()
{
my_ptrdiff_t const offset= table->s->default_values - table->record[0];
uchar bits= get_rec_bits(bit_ptr + offset, bit_ofs, bit_len);
set_rec_bits(bits, bit_ptr, bit_ofs, bit_len);
if (bit_len > 0)
{
my_ptrdiff_t const offset= table->s->default_values - table->record[0];
uchar bits= get_rec_bits(bit_ptr + offset, bit_ofs, bit_len);
set_rec_bits(bits, bit_ptr, bit_ofs, bit_len);
}
Field::set_default();
}

7
sql/field.h
View file

@ -1488,6 +1488,13 @@ private:
};
/**
BIT field represented as chars for non-MyISAM tables.
@todo The inheritance relationship is backwards since Field_bit is
an extended version of Field_bit_as_char and not the other way
around. Hence, we should refactor it to fix the hierarchy order.
*/
class Field_bit_as_char: public Field_bit {
public:
Field_bit_as_char(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,

11
sql/log_event.cc
View file

@ -6578,10 +6578,13 @@ copy_extra_record_fields(TABLE *table,
case FIELD_TYPE_BIT:
Field_bit *f= static_cast<Field_bit*>(*field_ptr);
my_ptrdiff_t const offset= table->record[1] - table->record[0];
uchar const bits=
get_rec_bits(f->bit_ptr + offset, f->bit_ofs, f->bit_len);
set_rec_bits(bits, f->bit_ptr, f->bit_ofs, f->bit_len);
if (f->bit_len > 0)
{
my_ptrdiff_t const offset= table->record[1] - table->record[0];
uchar const bits=
get_rec_bits(f->bit_ptr + offset, f->bit_ofs, f->bit_len);
set_rec_bits(bits, f->bit_ptr, f->bit_ofs, f->bit_len);
}
break;
}
}