postgres.git / summary / log / commit / refs

commit    81e36d3e0df8d3d7a3daa2e2216f96df23ffc96a
Author:   Thomas Munro <tmunro@postgresql.org>
Date:     Thu Aug 17 03:45:13 2023 +0000
First released in: 17.0, 15.5, 16.0

    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 <hlinnaka@iki.fi>
    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 f76c4605dbb..5d0f3d515c3 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;
 }
 
 /*


[parent: d3c25ca1bf59]