Bug #72451 [Asn->Fbk]: Wordpress/ stream_get_wrappers causes crash

Edit report at https://bugs.php.net/bug.php?id=72451&edit=1

 ID:                 72451
 Updated by:         [email protected]
 Reported by:        oldbucsfan at hotmail dot com
 Summary:            Wordpress/ stream_get_wrappers causes crash
-Status:             Assigned
+Status:             Feedback
 Type:               Bug
 Package:            Apache2 related
 Operating System:   Windows Server 2012 R2
 PHP Version:        7.0.7
 Assigned To:        ab
 Block user comment: N
 Private report:     N

 New Comment:

Please try using this snapshot:

  http://snaps.php.net/php-trunk-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/




Previous Comments:
------------------------------------------------------------------------
[2017-03-08 17:47:06] [email protected]

Please check the current master snapshots, a comprehensive patch fixing this kind of issues has landed there.

thanks.

------------------------------------------------------------------------
[2017-02-27 15:19:18] stumpe at gmail dot com

Hello,

i came across this error and can reproduce it. i compiled apache and php myself (on Linux hostname 3.12.62-60.64.8-default #1 SMP Tue Oct 18 12:21:38 UTC 2016 (42e0a66) x86_64 x86_64 x86_64 GNU/Linux) and saw this error pop up in the wordpress-instance

PHP Fatal error:  Allowed memory size of 6442450944 bytes exhausted (tried to allocate 15126708878888855354 bytes) in wp-includes/functions.php on line 5161

which is this function:

function wp_is_stream( $path ) {
        $wrappers = stream_get_wrappers();
        $wrappers_re = '(' . join('|', $wrappers) . ')';

        return preg_match( "!^$wrappers_re://!", $path ) === 1;
}


so i tried this code - to take a look if this is a wordpress-problem

<?php
print_r(stream_get_wrappers());
?>

first time i called the URL for this code i got error 500 and another PHP Fatal Error in the log

apache let the corrupted child die

[Mon Feb 27 15:50:34.341436 2017] [core:notice] [pid 10599:tid 139796708411136] AH00052: child pid 5329 exit signal Segmentation fault (11)

second time calling the script i got the output:

Array ( [0] => https [1] => ftps [2] => compress.zlib [3] => php [4] => file [5] => glob [6] => data [7] => http [8] => ftp [9] => phar [10] => zip )

something is still weird

apache 2.4.25
php 7.1.2
openssl 1.0.2k

------------------------------------------------------------------------
[2017-01-31 15:47:16] boldini at softcodex dot ch

hi, I tried to run also ab and abs with -n 1000 -c 10 with the code

$wrappers = stream_get_wrappers();
print_r($wrappers);
$wrappers_re = '(' . join('|', $wrappers) . ')';
print($wrappers_re);

but no crash happens!
I can say my cash happen every 2/3 weeks

Only have 1 site with phpmyadmin that use https, so few connections per day..
All other are normal http

------------------------------------------------------------------------
[2017-01-12 19:33:39] oldbucsfan at hotmail dot com

Thanks ab. All Apache/PHP/etc are all using OpenSSL/1.0.2j. So they aren't different versions. I have made sure that the right dlls are being loaded, so it's not a missing or conflicting dll. I'll get another backtrace for you.

Apache 2.4.25 (x64 vc14 ApacheLounge binaries)
PHP 7.1.0 (x64 thread safe from php.net)

boldini, are you also running with https enabled in Apache? It sounds like your error is much less frequent, but I was getting hit over https a few times a second, so a server with less load may not have this error appear but sparingly. It may be something where you need to have all 4 of these to get the error.

1. Apache enabled and fairly often hit over https
2. PHP 7
3. Windows Server 2012? - may or may not be a requirement
4. Some sort of code that triggers the error like the stream_get_wrappers(), although this may be more of a symptom than the source of the problem.

------------------------------------------------------------------------
[2017-01-12 17:21:19] [email protected]

@oldbucsfan as now there seems to be more or less stable reproduce case, could you please post the backtrace for it? The last backtrace in your comment from 2016-07-08 13:47 UTC did show only issue with Apache SSL module, no PHP. An accompanying thing could be to check, whether OpenSSL in your PHP and Apache are from the same series. Also, as per @boldini, is that still with or without Opcache?

Thanks.

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


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