MFH: Fixed bug #45392 (ob_start()/ob_end_clean() and memory_limit).

main/output.c

@@ -336,7 +336,13 @@ PHPAPI void php_end_ob_buffer(zend_bool send_buffer, zend_bool just_flush TSRMLS
 PHPAPI void php_end_ob_buffers(zend_bool send_buffer TSRMLS_DC)
 {
 	while (OG(ob_nesting_level)!=0) {
-		php_end_ob_buffer(send_buffer, 0 TSRMLS_CC);
+		/* in case of unclean_shutdown, do not output the buffer if it is not 
+		 * meant to be until end of script or ob_end_*() call */
+		if (CG(unclean_shutdown) && !OG(active_ob_buffer).chunk_size) {
+			php_end_ob_buffer(0, 0 TSRMLS_CC);
+		} else {
+			php_end_ob_buffer(send_buffer, 0 TSRMLS_CC);
+		}
 	}
 }
 /* }}} */

tests/lang/bug45392.phpt

@@ -0,0 +1,22 @@
+--TEST--
+Bug #45392 (ob_start()/ob_end_clean() and memory_limit)
+--INI--
+display_errors=stderr
+--FILE--
+<?php
+echo __LINE__ . "\n";
+ini_set('memory_limit', 100);
+ob_start(NULL, 10);
+echo __LINE__ ."\n";
+ob_start();
+$i = 0;
+while($i++ < 5000)  {
+  echo str_repeat("may not be displayed ", 42);
+}
+ob_end_flush();
+ob_end_clean();
+?>
+--EXPECTF--
+2
+Fatal error: Allowed memory size of %d bytes exhausted%s
+5