| From: | Peter Geoghegan <pg(at)bowt(dot)ie> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Fix nbtree lookahead overflow bug. |
| Date: | 2024-08-26 15:30:25 |
| Message-ID: | E1sibfl-001aBl-IP@gemulon.postgresql.org |
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| Thread: | |
| Lists: | pgsql-committers |
Fix nbtree lookahead overflow bug.
Add bounds checking to nbtree's lookahead/skip-within-a-page mechanism.
Otherwise it's possible for cases with lots of before-array-keys tuples
to overflow an int16 variable, causing the mechanism to generate an out
of bounds page offset number.
Oversight in commit 5bf748b8, which enhanced nbtree ScalarArrayOp
execution.
Reported-By: Alexander Lakhin <exclusion(at)gmail(dot)com>
Discussion: https://postgr.es/m/6c68ac42-bbb5-8b24-103e-af0e279c536f@gmail.com
Backpatch: 17-, where nbtree SAOP execution was enhanced.
Branch
------
REL_17_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/6749d4aabe74ca37ce351f2e318fe1b3bcf2b71c
Modified Files
--------------
src/backend/access/nbtree/nbtutils.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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