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| author | Thomas Munro | 2023-01-26 01:50:07 +0000 |
|---|---|---|
| committer | Thomas Munro | 2023-01-26 01:55:37 +0000 |
| commit | d95dcc9ab5f8816c7a4ac591628c68efaa2a9b7a (patch) | |
| tree | 1b004d5cc09c37aea2e76435f891e2c730ce2188 /doc/src | |
| parent | 243373159fb427dfb6fcf43e2ac403d9d3b82752 (diff) | |
Fix rare sharedtuplestore.c corruption.
If the final chunk of an oversized tuple being written out to disk was
exactly 32760 bytes, it would be corrupted due to a fencepost bug.
Bug #17619. Back-patch to 11 where the code arrived.
While testing that (see test module in archives), I (tmunro) noticed
that the per-participant page counter was not initialized to zero as it
should have been; that wasn't a live bug when it was written since DSM
memory was originally always zeroed, but since 14
min_dynamic_shared_memory might be configured and it supplies non-zeroed
memory, so that is also fixed here.
Author: Dmitry Astapov <dastapov@gmail.com>
Discussion: https://postgr.es/m/17619-0de62ceda812b8b5%40postgresql.org
Diffstat (limited to 'doc/src')
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