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Fix use of already freed memory when dumping a database's security label.

pg_dump.c:dumDatabase() called ArchiveEntry() with the results of a aquery that was PQclear()ed a couple lines earlier.Backpatch to 9.2 where security labels for shared objects whereintroduced.

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src/bin/pg_dump
- pg_dump.c

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`‎src/bin/pg_dump/pg_dump.c`

Lines changed: 9 additions & 5 deletions

Original file line number	Diff line number	Diff line change
`@@ -2476,25 +2476,29 @@ dumpDatabase(Archive fout, DumpOptions dopt)`
`2476`	`2476`	`dbCatId,0,dbDumpId);`
`2477`	`2477`	`}`
`2478`	`2478`
`2479`		`-PQclear(res);`
`2480`		`-`
`2481`	`2479`	`/* Dump shared security label. */`
`2482`	`2480`	`if (!dopt->no_security_labels&&fout->remoteVersion >=90200)`
`2483`	`2481`	`{`
`2484`		`-PQExpBufferseclabelQry=createPQExpBuffer();`
	`2482`	`+PGresult*shres;`
	`2483`	`+PQExpBufferseclabelQry;`
	`2484`	`+`
	`2485`	`+seclabelQry=createPQExpBuffer();`
`2485`	`2486`
`2486`	`2487`	`buildShSecLabelQuery(conn,"pg_database",dbCatId.oid,seclabelQry);`
`2487`		`-res=ExecuteSqlQuery(fout,seclabelQry->data,PGRES_TUPLES_OK);`
	`2488`	`+shres=ExecuteSqlQuery(fout,seclabelQry->data,PGRES_TUPLES_OK);`
`2488`	`2489`	`resetPQExpBuffer(seclabelQry);`
`2489`		`-emitShSecLabels(conn,res,seclabelQry,"DATABASE",datname);`
	`2490`	`+emitShSecLabels(conn,shres,seclabelQry,"DATABASE",datname);`
`2490`	`2491`	`if (strlen(seclabelQry->data))`
`2491`	`2492`	`ArchiveEntry(fout,dbCatId,createDumpId(),datname,NULL,NULL,`
`2492`	`2493`	`dba, false,"SECURITY LABEL",SECTION_NONE,`
`2493`	`2494`	`seclabelQry->data,"",NULL,`
`2494`	`2495`	`&dbDumpId,1,NULL,NULL);`
`2495`	`2496`	`destroyPQExpBuffer(seclabelQry);`
	`2497`	`+PQclear(shres);`
`2496`	`2498`	`}`
`2497`	`2499`
	`2500`	`+PQclear(res);`
	`2501`	`+`
`2498`	`2502`	`destroyPQExpBuffer(dbQry);`
`2499`	`2503`	`destroyPQExpBuffer(delQry);`
`2500`	`2504`	`destroyPQExpBuffer(creaQry);`

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Commit525b84c

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`‎src/bin/pg_dump/pg_dump.c`

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