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MDEV-26590: Stack smashing/buffer overflow in Histogram_json_hb::parse

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Provide buffer of sufficient size.
This commit is contained in:
Sergei Petrunia
2021-09-13 14:55:10 +03:00
parent 382250c05c
commit b179640219
3 changed files with 36 additions and 8 deletions
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13
mysql-test/main/statistics_json.test
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@ -170,5 +170,16 @@ set histogram_size=10, histogram_type='json_hb';
analyze table t10 persistent for all;
select histogram
from mysql.column_stats where table_name='t10' and db_name=database();
drop table t10;
--echo #
--echo # MDEV-26590: Stack smashing/buffer overflow in Histogram_json_hb::parse upon UPDATE on table with long VARCHAR
--echo #
CREATE TABLE t1 (b INT, a VARCHAR(3176));
INSERT INTO t1 VALUES (1,'foo'),(2,'bar');
SET histogram_type= JSON_HB;
ANALYZE TABLE t1 PERSISTENT FOR ALL;
SELECT * FROM t1;
drop table t1;