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pgsql: Fix nbtree lookahead overflow bug. 2+ messages / 1 participants [nested] [flat]
* pgsql: Fix nbtree lookahead overflow bug. @ 2024-08-26 15:30 Peter Geoghegan <pg@bowt.ie> 0 siblings, 0 replies; 2+ messages in thread From: Peter Geoghegan @ 2024-08-26 15:30 UTC (permalink / raw) To: pgsql-committers@lists.postgresql.org 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@gmail.com> Discussion: https://postgr.es/m/6c68ac42-bbb5-8b24-103e-af0e279c536f@gmail.com Backpatch: 17-, where nbtree SAOP execution was enhanced. Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/09a8407dbfd848301cd2c9801c3b4d75adc6cabc Modified Files -------------- src/backend/access/nbtree/nbtutils.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) ^ permalink raw reply [nested|flat] 2+ messages in thread
* pgsql: Fix nbtree lookahead overflow bug. @ 2024-08-26 15:30 Peter Geoghegan <pg@bowt.ie> 0 siblings, 0 replies; 2+ messages in thread From: Peter Geoghegan @ 2024-08-26 15:30 UTC (permalink / raw) To: pgsql-committers@lists.postgresql.org 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@gmail.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(-) ^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2024-08-26 15:30 UTC | newest] Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2024-08-26 15:30 pgsql: Fix nbtree lookahead overflow bug. Peter Geoghegan <pg@bowt.ie> 2024-08-26 15:30 pgsql: Fix nbtree lookahead overflow bug. Peter Geoghegan <pg@bowt.ie>
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