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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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15
mysql-test/main/statistics_json.result
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@ -7445,3 +7445,18 @@ histogram
]
}
drop table t10;
#
# MDEV-26590: Stack smashing/buffer overflow in Histogram_json_hb::parse upon UPDATE on table with long VARCHAR
#
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;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
SELECT * FROM t1;
b a
1 foo
2 bar
drop table t1;