pgsql: Add missed bms_copy() in perform_pruning_combine_step - Mailing list pgsql-committers

From Alvaro Herrera
Subject pgsql: Add missed bms_copy() in perform_pruning_combine_step
Date
Msg-id E1f5XK3-0004Em-QZ@gemulon.postgresql.org
Whole thread Raw
List pgsql-committers
Add missed bms_copy() in perform_pruning_combine_step

We were initializing a BMS to merely reference an existing one, which
would cause a double-free (and a crash) when the recursive algorithm
tried to intersect it with an empty one.  Fix it by creating a copy at
initialization time.

Reported-by: sqlsmith (by way of Andreas Seltenreich)
Author: Amit Langote
Discussion: https://postgr.es/m/87in923lyw.fsf@ansel.ydns.eu

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/7ba6ee815dc90d4fab7226d343bf72aa28c9aa5c

Modified Files
--------------
src/backend/partitioning/partprune.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)


pgsql-committers by date:

Previous
From: Heikki Linnakangas
Date:
Subject: pgsql: Fix typo in comment.
Next
From: David Rowley
Date:
Subject: Re: pgsql: Support partition pruning at execution time