php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #39726 segmentation fault in imap_open
Submitted: 2006-12-04 10:41 UTC Modified: 2006-12-12 01:00 UTC
Votes:3
Avg. Score:4.7 ± 0.5
Reproduced:2 of 2 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: rommer at active dot by Assigned:
Status: No Feedback Package: IMAP related
PHP Version: 4.4.4 OS: Centos-3 x86
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: rommer at active dot by
New email:
PHP Version: OS:

 

 [2006-12-04 10:41 UTC] rommer at active dot by 
Description:
------------
Segmentation fault in function imap_open if script opens
~ 4000 files before.
I have increased __FD_SETSIZE in
/usr/include/bits/typesizes.h
/usr/include/linux/posix_types.h
to 262144 before compiling php (4.4.4, 5.1.6, 4.4.5-dev)


Reproduce code:
---------------
<?                                                                                                              
                                                                                                                
    $basedir = "/tmp/php_testcase";                                                                             
                                                                                                                
    if (! file_exists ($basedir)) {                                                                             
        mkdir ($basedir, 0700);                                                                                 
    }                                                                                                           
                                                                                                                
    $fds = array();                                                                                             
    for ($i = 0; $i < 4096; $i++) {                                                                             
        $fds[] = fopen ($basedir . '/file_' . $i, 'w');                                                         
    }                                                                                                           
                                                                                                                
    imap_open ('{127.0.0.1:143/imap/notls}INBOX',                                                               
               'test@test.com', 'test', 64);                                                                    
                                                                                                                
?>

Expected result:
----------------
no segfault

Actual result:
--------------
Segmentation fault.

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2006-12-04 10:50 UTC] tony2001@php.net 
Thank you for this bug report. To properly diagnose the problem, we
need a backtrace to see what is happening behind the scenes. To
find out how to generate a backtrace, please read
http://bugs.php.net/bugs-generating-backtrace.php for *NIX and
http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32

Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open". Thank you for helping
us make PHP better.
 [2006-12-04 14:17 UTC] rommer at active dot by 
This is backtrace (php with --enable-debug, non-stripped)

(gdb) run -X
Starting program: /usr/local/apache-clean/bin/httpd -X
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 3248)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 3248)]
0x404e8e64 in ?? () from /usr/local/apache-clean/modules/libphp4.so
(gdb) bt
#0  0x404e8e64 in ?? () from /usr/local/apache-clean/modules/libphp4.so
#1  0x00001011 in ?? ()
#2  0x00000000 in ?? ()
 [2006-12-04 14:23 UTC] tony2001@php.net 
>I have increased __FD_SETSIZE in <..skip..>to 262144 before compiling php
You should have done this before compiling c-client, as imap_open() is just a wrapper for c-client functions.

Please make sure you've configured PHP with --enabled-debug and regenerate the backtrace.
 [2006-12-12 01:00 UTC] php-bugs at lists dot php dot net 
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 [2008-12-16 14:51 UTC] michel at webawere dot com 
Hi,

I have this simmular problem. In tried it on centos linux 5.2 with apache and php 5.2.5. AND php 5.2.8

This command will get me an empty webpage and a line about segmentation fault in errorlog.
$mbox = imap_open($mailbox, $user, $passwd);

In errorlog:
[notice] child pid 14851 exit signal Segmentation fault (11)

Is there a work-around ?
regards,
Michel
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Mon Apr 28 01:01:28 2025 UTC