pgsql: In REFRESH MATERIALIZED VIEW, set user ID before running user co - Mailing list pgsql-committers

In REFRESH MATERIALIZED VIEW, set user ID before running user code.

It intended to, but did not, achieve this.  Adopt the new standard of
setting user ID just after locking the relation.  Back-patch to v10 (all
supported versions).

Reviewed by Simon Riggs.  Reported by Alvaro Herrera.

Security: CVE-2022-1552

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/0abc1a059e27c5a71a1a186c97d9c0af407469cc

Modified Files
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src/backend/commands/matview.c           | 30 +++++++++++-------------------
src/test/regress/expected/privileges.out | 16 ++++++++++++++++
src/test/regress/sql/privileges.sql      | 17 +++++++++++++++++
3 files changed, 44 insertions(+), 19 deletions(-)