s3: fix the fix for bug #6195 - dont let smbd child processes panic

This patch makes sure the original and temporary TDBs are closed
_before_ the rename. Originally, the open TDB was renamed, and so
the name passdb.tdb.tmp stayed around in the db context. Hence
upon client connect, the smbd children died because reinit_after_fork()
calling tdb_reopen_all() would try to reopen passdb.tdb.tmp which
existed no longer...

Michael

1 files changed, 16 insertions, 2 deletions

diff --git a/source3/passdb/pdb_tdb.c b/source3/passdb/pdb_tdb.c
index 1060733df4..6c49eb1dc2 100644
--- a/source3/passdb/pdb_tdb.c
+++ b/source3/passdb/pdb_tdb.c
@@ -250,6 +250,11 @@ static bool tdbsam_convert_backup(const char *dbname, struct db_context **pp_db)
 		smb_panic("tdbsam_convert_backup: orig commit failed\n");
 	}
 
+	/* be sure to close the DBs _before_ renaming the file */
+
+	TALLOC_FREE(orig_db);
+	TALLOC_FREE(tmp_db);
+
 	/* This is safe from other users as we know we're
  	 * under a mutex here. */
 
@@ -262,13 +267,22 @@ static bool tdbsam_convert_backup(const char *dbname, struct db_context **pp_db)
 	}
 
 	TALLOC_FREE(frame);
-	TALLOC_FREE(orig_db);
+
+	/* re-open the converted TDB */
+
+	orig_db = db_open(NULL, dbname, 0,
+			  TDB_DEFAULT, O_CREAT|O_RDWR, 0600);
+	if (orig_db == NULL) {
+		DEBUG(0, ("tdbsam_convert_backup: Failed to re-open "
+			  "converted passdb TDB [%s]\n", dbname));
+		return false;
+	}
 
 	DEBUG(1, ("tdbsam_convert_backup: updated %s file.\n",
 		dbname ));
 
 	/* Replace the global db pointer. */
-	*pp_db = tmp_db;
+	*pp_db = orig_db;
 	return true;
 
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