[Commits] a20e1ce85ec: MDEV-13232: Assertion `(&(&share->intern_lock)->m_mutex)->count > 0 && pthread_equal(pthread_self(), (&(&share->intern_lock)->m_mutex)->thread)' failed in _ma_state_info_write

Alexander Barkov bar at mariadb.com
Mon Apr 23 12:47:38 EEST 2018


Hi Sanja,

the patch is OK to push. Thanks.


On 04/23/2018 12:37 PM, Oleksandr Byelkin wrote:
> revision-id: a20e1ce85ec56616fa048e9ba39c25c65b098fce (mariadb-10.3.6-36-ga20e1ce85ec)
> parent(s): c6ba758d1d41c11466b8f9b61b4546efc95aa689
> author: Oleksandr Byelkin
> committer: Oleksandr Byelkin
> timestamp: 2018-04-23 10:35:33 +0200
> message:
> 
> MDEV-13232: Assertion `(&(&share->intern_lock)->m_mutex)->count > 0 && pthread_equal(pthread_self(), (&(&share->intern_lock)->m_mutex)->thread)' failed in _ma_state_info_write
> 
> Limit length of result of "negative" operation to something reasonable
> 
> ---
>  mysql-test/main/union.result | 14 ++++++++++++++
>  mysql-test/main/union.test   | 15 +++++++++++++++
>  sql/item_func.cc             |  3 +++
>  3 files changed, 32 insertions(+)
> 
> diff --git a/mysql-test/main/union.result b/mysql-test/main/union.result
> index 4e5f9312e03..39cd68ae851 100644
> --- a/mysql-test/main/union.result
> +++ b/mysql-test/main/union.result
> @@ -2500,5 +2500,19 @@ t2	CREATE TABLE `t2` (
>  DROP TABLE t2;
>  DROP TABLE t1;
>  #
> +# MDEV-13232: Assertion `(&(&share->intern_lock)->m_mutex)->count > 0 &&
> +# pthread_equal(pthread_self(), (&(&share->intern_lock)->m_mutex)->
> +# thread)' failed in _ma_state_info_write
> +#
> +CREATE TABLE t1 (c1 CHAR(8));
> +INSERT INTO t1 VALUES ('10'),('-10');
> +CREATE TABLE t2 (c2 CHAR);
> +SET @a= CAST('10' AS CHAR);
> +SELECT c1 FROM t1 UNION SELECT - @a FROM t2;
> +c1
> +10
> +-10
> +drop table t1,t2;
> +#
>  # End of 10.3 tests
>  #
> diff --git a/mysql-test/main/union.test b/mysql-test/main/union.test
> index f86cae87524..b9b38271f83 100644
> --- a/mysql-test/main/union.test
> +++ b/mysql-test/main/union.test
> @@ -1745,6 +1745,21 @@ SHOW CREATE TABLE t2;
>  DROP TABLE t2;
>  DROP TABLE t1;
>  
> +--echo #
> +--echo # MDEV-13232: Assertion `(&(&share->intern_lock)->m_mutex)->count > 0 &&
> +--echo # pthread_equal(pthread_self(), (&(&share->intern_lock)->m_mutex)->
> +--echo # thread)' failed in _ma_state_info_write
> +--echo #
> +
> +CREATE TABLE t1 (c1 CHAR(8));
> +INSERT INTO t1 VALUES ('10'),('-10');
> + 
> +CREATE TABLE t2 (c2 CHAR);
> +SET @a= CAST('10' AS CHAR);
> + 
> +SELECT c1 FROM t1 UNION SELECT - @a FROM t2;
> +
> +drop table t1,t2;
>  
>  --echo #
>  --echo # End of 10.3 tests
> diff --git a/sql/item_func.cc b/sql/item_func.cc
> index e2740272385..ae6c61e83f4 100644
> --- a/sql/item_func.cc
> +++ b/sql/item_func.cc
> @@ -1935,6 +1935,9 @@ void Item_func_neg::fix_length_and_dec_double()
>    set_handler(&type_handler_double);
>    decimals= args[0]->decimals; // Preserve NOT_FIXED_DEC
>    max_length= args[0]->max_length + 1;
> +  // Limit length with something reasonable
> +  uint32 mlen= type_handler()->max_display_length(this);
> +  set_if_smaller(max_length, mlen);
>    unsigned_flag= false;
>  }
>  
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