Bug #54798 [Asn->Csd]: Segfault when CURLOPT_STDERR file pointer is closed before calling curl_exec

From: Date: Mon, 12 Sep 2011 09:19:17 +0000
Subject: Bug #54798 [Asn->Csd]: Segfault when CURLOPT_STDERR file pointer is closed before calling curl_exec
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=54798&edit=1

 ID:                 54798
 Updated by:         bjori@php.net
 Reported by:        shein@php.net
 Summary:            Segfault when CURLOPT_STDERR file pointer is closed
                     before calling curl_exec
-Status:             Assigned
+Status:             Closed
 Type:               Bug
 Package:            cURL related
 Operating System:   Ubuntu Linux 11.04 x86
 PHP Version:        trunk-SVN-2011-05-17 (SVN)
 Assigned To:        bjori
 Block user comment: N
 Private report:     N

 New Comment:

http://svn.php.net/viewvc?view=revision&revision=316511


Previous Comments:
------------------------------------------------------------------------
[2011-09-09 11:36:50] shein@php.net

The fix was wrong, reopening bug, see discussion over here: 
http://news.php.net/php.cvs/66389 and here http://news.php.net/php.cvs/66399

------------------------------------------------------------------------
[2011-09-08 14:37:37] bjori@php.net

This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.

 For Windows:

http://windows.php.net/snapshots/
 
Thank you for the report, and for helping us make PHP better.



------------------------------------------------------------------------
[2011-09-08 14:37:05] bjori@php.net

Automatic comment from SVN on behalf of bjori
Revision: http://svn.php.net/viewvc/?view=revision&revision=316417
Log: Fixed bug#54798	Segfault when CURLOPT_STDERR file pointer is closed before calling curl_exec

------------------------------------------------------------------------
[2011-05-17 16:25:32] shein@php.net

Description:
------------
Related to http://bugs.php.net/bug.php?id=48203

Curl crashes when CURLOPT_STDERR file pointer is closed before calling 
curl_exec(), i.e.

$fp = fopen(dirname(__FILE__) . '/bug48203.tmp', 'w');

$ch = curl_init();

curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_STDERR, $fp);
curl_setopt($ch, CURLOPT_URL, getenv("PHP_CURL_HTTP_REMOTE_SERVER"));

fclose($fp); // <-- premature close of $fp caused a crash!

curl_exec($ch); // segfault


Error is reproduced on latest svn php5.3, php5.4 and trunk
Fix is also attached here.



Test script:
---------------
Full test script is available here: http://svn.php.net/viewvc/php/php-src/trunk/ext/curl/tests/bug48203.phpt?view=markup

Expected result:
----------------
No segfault, see test script

Actual result:
--------------
Segfault


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



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