Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
  Fix #78473: odbc_close() closes arbitrary resources

Author: cmb69

NEWS

@@ -18,6 +18,9 @@ PHP                                                                        NEWS
   . Fixed bug #78334 (fpm log prefix message includes wrong stdout/stderr
     notation). (Tsuyoshi Sadakata)
 
+- ODBC:
+  . Fixed bug #78473 (odbc_close() closes arbitrary resources). (cmb)
+
 - SPL:
   . Fixed bug #78436 (Missing addref in SplPriorityQueue EXTR_BOTH mode).
     (Nikita)

ext/odbc/php_odbc.c

@@ -2694,7 +2694,10 @@ PHP_FUNCTION(odbc_close)
 		return;
 	}
 
-	conn = (odbc_connection *)zend_fetch_resource2(Z_RES_P(pv_conn), "ODBC-Link", le_conn, le_pconn);
+	if (!(conn = (odbc_connection *)zend_fetch_resource2(Z_RES_P(pv_conn), "ODBC-Link", le_conn, le_pconn))) {
+		RETURN_FALSE;
+	}
+
 	if (Z_RES_P(pv_conn)->type == le_pconn) {
 		is_pconn = 1;
 	}

ext/odbc/tests/bug78473.phpt

@@ -0,0 +1,14 @@
+--TEST--
+Bug #78473 (odbc_close() closes arbitrary resources)
+--SKIPIF--
+<?php
+if (!extension_loaded('odbc')) die('skip odbc extension not available');
+?>
+--FILE--
+<?php
+odbc_close(STDIN);
+var_dump(STDIN);
+?>
+--EXPECTF--
+Warning: odbc_close(): supplied resource is not a valid ODBC-Link resource in %s on line %d
+resource(%d) of type (stream)