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| author | Thomas Munro <tmunro@postgresql.org> | 2023-01-26 14:50:07 +1300 |
|---|---|---|
| committer | Thomas Munro <tmunro@postgresql.org> | 2023-01-26 14:52:19 +1300 |
| commit | ffcf6f4cfca5a4ce2ac7ff7e8fa17541a5a9caea (patch) | |
| tree | 416e857ce53e6dc7a65e5c0be90c73969270dff7 /src/backend/access/gist/gistget.c | |
| parent | 9aeff092c05820d6a9252d7a3f8db86f71f2205f (diff) | |
| download | postgresql-ffcf6f4cfca5a4ce2ac7ff7e8fa17541a5a9caea.tar.gz postgresql-ffcf6f4cfca5a4ce2ac7ff7e8fa17541a5a9caea.zip | |
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 'src/backend/access/gist/gistget.c')
0 files changed, 0 insertions, 0 deletions