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MDEV-11551 Server crashes in Field::is_real_null

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sometimes table->s->stored_fields is less than table->s->null_fields
This commit is contained in:
Sergei Golubchik 2017-01-12 00:33:21 +01:00
parent 7e2f9d092d
commit 5dfab33c4e
3 changed files with 25 additions and 1 deletions
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10
mysql-test/r/trigger_null-8605.result
View file

@ -354,3 +354,13 @@ show columns from t1;
Field Type Null Key Default Extra
a int(11) NO PRI NULL
drop table t1;
create table t1 (
pk int primary key,
i int,
v1 int as (i) virtual,
v2 int as (i) virtual
);
create trigger tr before update on t1 for each row set @a = 1;
insert into t1 (pk, i) values (null, null);
ERROR 23000: Column 'pk' cannot be null
drop table t1;

14
mysql-test/t/trigger_null-8605.test
View file

@ -373,3 +373,17 @@ show columns from t1;
insert into t1 (a) values (3);
show columns from t1;
drop table t1;
#
# MDEV-11551 Server crashes in Field::is_real_null
#
create table t1 (
pk int primary key,
i int,
v1 int as (i) virtual,
v2 int as (i) virtual
);
create trigger tr before update on t1 for each row set @a = 1;
--error ER_BAD_NULL_ERROR
insert into t1 (pk, i) values (null, null);
drop table t1;

2
sql/sql_trigger.cc
View file

@ -1082,7 +1082,7 @@ bool Table_triggers_list::prepare_record_accessors(TABLE *table)
&& (table->s->stored_fields != table->s->null_fields))
{
int null_bytes= (table->s->stored_fields - table->s->null_fields + 7)/8;
int null_bytes= (table->s->fields - table->s->null_fields + 7)/8;
if (!(extra_null_bitmap= (uchar*)alloc_root(&table->mem_root, null_bytes)))
return 1;
if (!(record0_field= (Field **)alloc_root(&table->mem_root,