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Invalidate smgr_targblock in smgrrelease().

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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
This commit is contained in:
Thomas Munro 2023-08-17 15:45:13 +12:00
parent 1bc19dfcfe
commit d23e60e667
1 changed files with 1 additions and 0 deletions
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src/backend/storage/smgr/smgr.c
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@ -292,6 +292,7 @@ smgrrelease(SMgrRelation reln)
smgrsw[reln->smgr_which].smgr_close(reln, forknum);
reln->smgr_cached_nblocks[forknum] = InvalidBlockNumber;
}
reln->smgr_targblock = InvalidBlockNumber;
}
/*