Bug #75649 [Opn->Fbk]: fgets second parameter causes memory leak

From: Date: Tue, 16 Mar 2021 12:03:32 +0000
Subject: Bug #75649 [Opn->Fbk]: fgets second parameter causes memory leak
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-232773@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=75649&edit=1

 ID:                 75649
 Updated by:         cmb@php.net
 Reported by:        zoolyka at gmail dot com
 Summary:            fgets second parameter causes memory leak
-Status:             Open
+Status:             Feedback
 Type:               Bug
-Package:            *General Issues
+Package:            Filesystem function related
 Operating System:   ubuntu
 PHP Version:        5.6.32
-Assigned To:        
+Assigned To:        cmb
 Block user comment: N
 Private report:     N

 New Comment:

I cannot reproduce this with PHP-7.4.  Is this still an issue for
you with any of the actively supported PHP versions[1]?

[1] <https://www.php.net/supported-versions.php>


Previous Comments:
------------------------------------------------------------------------
[2017-12-07 17:46:53] zoolyka at gmail dot com

Description:
------------
If I specify a larger number then 8192 for fgets's length then PHP process starts to eat
memory.

Test script:
---------------
<?php

$handle = fopen('multi_gb_file', 'r');
while (
  ! feof($handle)
) {
  $buffer = fgets($handle, 10485760);
}
fclose($handle);

?>

Expected result:
----------------
If length is much more then 8192 and the opened file is really huge then memory usage will rise up
to the size of the readed file's size.



------------------------------------------------------------------------



--
Edit this bug report at https://bugs.php.net/bug.php?id=75649&edit=1

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