Fix missing money overflow checks for INT64_MIN / -1
Similar to what 1f7cb5c30 did for the INT types, protect against
overflow when dividing the lowest possible money value by -1. This
cannot be represented on a two's complement machine.
Without this check, the result depends on the machine, and in the worst
case, could result in a crash. With the fix installed, this will now
result in:
ERROR: money out of range
Bug: #19585
Author: Andrey Rachitskiy <pl0h0yp1@gmail.com>
Reported-by: Michael Malis <malis@pgrust.com>
Reviewed-by: Tristan Partin <tristan@partin.io>
Reviewed-by: Rafia Sabih <rafia.pghackers@gmail.com>
Discussion: https://postgr.es/m/19586-bb603bf5ad9934dd%40postgresql.org
Discussion: https://postgr.es/m/CAB8bMisnXJVXte6s3kUOpuuAY9%3D9kehG6MMX-%2BTQoFsSGan22Q%40mail.gmail.com
Backpatch-through: 14
Branch
------
REL_14_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/fec40878c8702ff4e58241d00a1914d8568bec03
Modified Files
--------------
src/backend/utils/adt/cash.c | 16 ++++++++++++++++
src/test/regress/expected/money.out | 8 ++++++++
src/test/regress/sql/money.sql | 4 ++++
3 files changed, 28 insertions(+)
