From 81e36d3e0df8d3d7a3daa2e2216f96df23ffc96a Mon Sep 17 00:00:00 2001 From: Thomas Munro Date: Thu, 17 Aug 2023 15:45:13 +1200 Subject: [PATCH] Invalidate smgr_targblock in smgrrelease(). In rare circumstances involving relfilenode reuse, it might have been possible for smgr_targblock to finish up pointing past the end. Oversight in b74e94dc. Back-patch to 15. Reviewed-by: Heikki Linnakangas Discussion: https://postgr.es/m/CA%2BhUKGJ8NTvqLHz6dqbQnt2c8XCki4r2QvXjBQcXpVwxTY_pvA%40mail.gmail.com --- src/backend/storage/smgr/smgr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/backend/storage/smgr/smgr.c b/src/backend/storage/smgr/smgr.c index f76c4605db..5d0f3d515c 100644 --- a/src/backend/storage/smgr/smgr.c +++ b/src/backend/storage/smgr/smgr.c @@ -296,6 +296,7 @@ smgrrelease(SMgrRelation reln) smgrsw[reln->smgr_which].smgr_close(reln, forknum); reln->smgr_cached_nblocks[forknum] = InvalidBlockNumber; } + reln->smgr_targblock = InvalidBlockNumber; } /*