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01805b7d16
ProcessSingleRelationByOid called RelationGetSmgr(rel), discarded the result, and then read rel->rd_smgr directly when looping over forks. Only RelationGetSmgr is authorized to read that field since a relcache invalidation resets rd_smgr to NULL. Backpatch to v19 where online checksums were introduced. Author: Mihail Nikalayeu <mihailnikalayeu@gmail.com> Reviewed-by: ChangAo Chen <cca5507@qq.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/CADzfLwXGvb4Y-mqy8T+O0f_tkXR1sTDBGzP5Z=V_qcGnZ46rWg@mail.gmail.com Backpatch-through: 19