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 <dasta...@gmail.com> Discussion: https://postgr.es/m/17619-0de62ceda812b8b5%40postgresql.org Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/ffcf6f4cfca5a4ce2ac7ff7e8fa17541a5a9caea Modified Files -------------- src/backend/utils/sort/sharedtuplestore.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)