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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2021-06-24 10:45:23 +0300 |
|---|---|---|
| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2021-06-24 10:45:43 +0300 |
| commit | caac1965077ffd995dfbe9facf88c05afa868c92 (patch) | |
| tree | 6747d4942ef2e9034a93c8edd033517e618aa9db /src/backend/access/transam/clog.c | |
| parent | a73bd49c69e16197e8da43bc7cb17a38bd89aeee (diff) | |
| download | postgresql-caac1965077ffd995dfbe9facf88c05afa868c92.tar.gz postgresql-caac1965077ffd995dfbe9facf88c05afa868c92.zip | |
Prevent race condition while reading relmapper file.
Contrary to the comment here, POSIX does not guarantee atomicity of a
read(), if another process calls write() concurrently. Or at least Linux
does not. Add locking to load_relmap_file() to avoid the race condition.
Fixes bug #17064. Thanks to Alexander Lakhin for the report and test case.
Backpatch-through: 9.6, all supported versions.
Discussion: https://www.postgresql.org/message-id/17064-bb0d7904ef72add3@postgresql.org
Diffstat (limited to 'src/backend/access/transam/clog.c')
0 files changed, 0 insertions, 0 deletions