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In the stay-on-last-page optimization for sqlite3BtreeIndexMoveto()

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(check-in [0057bbb508e7662b] about 16 hours ago), be sure
to clear the BTCF_ValidOvfl flag, since the overflow cache is invalidated
by the search on the last page.  OSSFuzz issue 45329.

FossilOrigin-Name: 0021bebc162e001b788786703ce634e7b8fcd3976f7047a5956e82140791e765
This commit is contained in:
drh
2022-03-07 17:19:40 +00:00
parent 4c460bbffd
commit 42bb09c412
4 changed files with 30 additions and 8 deletions
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21
test/btree01.test
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@ -129,4 +129,25 @@ for {set i 1} {$i<=31} {incr i} {
} {ok}
}
# 2022-03-06 OSSFuzz issue 45329
# An assertion fault due to the failure to clear a flag in an optimization
# committed last night.
#
# When the stay-on-last page optimization of sqlite3BtreeIndexMoveto() is
# invoked, it needs to clear the BTCF_ValidOvfl flag.
#
db close
sqlite3 db :memory:
do_execsql_test btree01-2.1 {
PRAGMA page_size=1024;
CREATE TABLE t1(a INT PRIMARY KEY, b BLOB, c INT) WITHOUT ROWID;
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)
INSERT INTO t1(a,b,c) SELECT x*2, zeroblob(100), x FROM c;
UPDATE t1 SET b=zeroblob(1000) WHERE a=198;
CREATE TABLE t2(x INTEGER PRIMARY KEY, y INT);
INSERT INTO t2(y) VALUES(198),(187),(100);
SELECT y, c FROM t2 LEFT JOIN t1 ON y=a ORDER BY x;
} {198 99 187 {} 100 50}
finish_test