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Bug #73041 max_execution_time starts counting when file upload starts
Submitted: 2016-09-07 16:03 UTC Modified: 2016-09-08 11:44 UTC
From: mitenem at outlook dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 7.0.10 OS: Windows
Private report: No CVE-ID: None
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From: mitenem at outlook dot com
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 [2016-09-07 16:03 UTC] mitenem at outlook dot com 
Description:
------------
When I try to upload file and upload takes more than max_execution_time, PHP returns fatal error maximum execution time was exceeded immediately after file is uploaded. Error is always thrown on line in which first <?php or <? appears.

I use Apache 2.4.23 with PHP 7.0.10 as an module (tested on systems with both 32-bit and both 64-bit).

Apache configuration for PHP in httpd.conf:
LoadModule php7_module [...]/php/php7apache2_4.dll
<FilesMatch \.php$>
  SetHandler application/x-httpd-php
</FilesMatch>

Various tested scenarios:
* max_execution_time = 30, max_input_time = -1
  * uploaded 200 kB file: upload took about 5 seconds, no errors, successfully uploaded
  * uploaded 3 MB file: upload took about 35 seconds, fatal error
  * uploaded 8 MB file: upload took about 90 seconds, fatal error
* max_execution_time = 30, max_input_time = 300
  * uploaded 200 kB file: upload took about 5 seconds, no errors, successfully uploaded
  * uploaded 3 MB file: upload took about 35 seconds, fatal error
  * uploaded 8 MB file: upload took about 90 seconds, fatal error
* max_execution_time = 300, max_input_time = 300
  * uploaded 200 kB file: upload took about 5 seconds, no errors, successfully uploaded
  * uploaded 3 MB file: upload took about 35 seconds, no errors, successfully uploaded
  * uploaded 8 MB file: upload took about 90 seconds, no errors, successfully uploaded

Script below was tested without php.ini file.
Values returned by ini_get:
max_execution_time = 30
max_input_time = -1

Test script:
---------------
<!DOCTYPE html>
<html>
<body>
<form action="<?=$_SERVER['PHP_SELF']?>" method="post" enctype="multipart/form-data">
	<input type="file" name="file" />
	<input type="submit" />
</form>
<?php print_r($_FILES); ?>
</body>
</html>

Expected result:
----------------
File should be normally uploaded and $_FILES should contain its data.

Actual result:
--------------
Fatal error: Maximum execution time of 30 seconds exceeded in [...]\test.php on line 4

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 [2016-09-08 11:44 UTC] ab@php.net
-Status: Open +Status: Not a bug
 [2016-09-08 11:44 UTC] ab@php.net 
Thanks for the report. It is not a bug. Ensuring the timeout setting is high enough is the way to go. Turning off the time limit puts your site under security risk.

Thanks.
 
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