Horton

Add runtime checks for bogus multixact offsets

Heikki Linnakangas <heikki.linnakangas@iki.fi>

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Commit: d4b7bde4183bc39c6d7a22d22188fc4aab2ba8d1
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2025-12-11T09:18:14Z
Releases: 19 (unreleased) 
Add runtime checks for bogus multixact offsets

It's not far-fetched that we'd try to read a multixid with an invalid
offset in case of bugs or corruption. Or if you call
pg_get_multixact_members() after a crash that left behind invalid but
unused multixids. Better to get a somewhat descriptive error message
if that happens.

Discussion: https://www.postgresql.org/message-id/3624730d-6dae-42bf-9458-76c4c965fb27@iki.fi

Files

PathChange+/−
src/backend/access/transam/multixact.c modified +21 −12

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