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Bug #26393 Segfault during request shutdown in _oci_close_session() (oci8.c:2443)
Submitted: 2003-11-24 23:19 UTC Modified: 2005-09-08 11:45 UTC
Votes:10
Avg. Score:4.9 ± 0.3
Reproduced:8 of 9 (88.9%)
Same Version:5 (62.5%)
Same OS:5 (62.5%)
From: troy dot tinnes at motorola dot com Assigned: tony2001 (profile)
Status: Closed Package: OCI8 related
PHP Version: 4.3.4 OS: Solaris 2.8
Private report: No CVE-ID: None
 [2003-11-24 23:19 UTC] troy dot tinnes at motorola dot com
Description:
------------
Environment:
Sun Solaris 2.8
Sun Ultra Enterprise
PHP 4.3.4
Apache 2.0.47
Problem Description: On some HTML outputs, the page code stops unexpectedly. There does not appear to be any real reason for halting the execution - it stops generating code many times - midway through displaying a record (1 HTML table row). For example if I have a query that shows which people bought widget "a" in the past month - the output might be ok. Use the same script and show which people bought widget "b" - the script might stop 3/4 of the way down the page mid-record. One thing that is consistent - is that it will always stop in the same place. 2 days later, Widget "b" output might be fine - displaying Widget "a" is now a problem. 

Reproduce code:
---------------
I use object-oriented code to do the database activities - example:
$db = new myDB ($db1);
$db->connect();
$db->query($sql1);

In the db.class file, I have functions like this:

function connect ()
   {
   $conn = ocilogon ($this->username, $this->password,
                     $this->hostspec);
   $this->conn = $conn;
   }

AND

function query ($sql)
   {
   $this->stmt = @ociparse ($this->conn, $sql);

   if (!$this->stmt) {
      return false;
   }
   else {
      @ociexecute($this->stmt, OCI_DEFAULT);
      return($this->rowcount());
        }
   }

As I said before, I do not use persistent connections because I have several different database instances I connect to based on the type of information requested. 

Expected result:
----------------
I am hoping to see complete HTML outputs!

Actual result:
--------------
BACKTRACE:
---------
solaris8:/opt/web/apache_php/apache2/bin# /usr/misc/bin/gdb /opt/web/apache_php/apache2/bin/httpd
GNU gdb 5.3
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB.  Type "show warranty" for details. This GDB was configured as "sparc-sun-solaris2.8"...
(gdb) run -X
Starting program: /opt/web/apache_php/apache2/bin/httpd -X
[New LWP 1]
[New LWP 2]
[New LWP 3]
[New LWP 4]
[New LWP 5]

Program received signal SIGSEGV, Segmentation fault.
0xff0331f0 in strlen () from /usr/lib/libc.so.1
(gdb) bt
#0  0xff0331f0 in strlen () from /usr/lib/libc.so.1
#1  0xfe1e5918 in _oci_close_session (session=0x313bc8)
    at /opt/web/apache_php/source/php-4.3.4/ext/oci8/oci8.c:2443
#2  0xfe1e0ca8 in _oci_session_list_dtor (rsrc=0x200e30)
    at /opt/web/apache_php/source/php-4.3.4/ext/oci8/oci8.c:935
#3  0xfe36dcb0 in list_entry_destructor (ptr=0x200e30)
    at /opt/web/apache_php/source/php-4.3.4/Zend/zend_list.c:177
#4  0xfe36aa64 in zend_hash_apply_deleter (ht=0xfe3e13fc, p=0x2017b0)
    at /opt/web/apache_php/source/php-4.3.4/Zend/zend_hash.c:608
#5  0xfe36ae04 in zend_hash_graceful_reverse_destroy (ht=0xfe3e13fc)
    at /opt/web/apache_php/source/php-4.3.4/Zend/zend_hash.c:674
#6  0xfe36dee0 in zend_destroy_rsrc_list (ht=0xfe3e13fc)
    at /opt/web/apache_php/source/php-4.3.4/Zend/zend_list.c:233
#7  0xfe3501dc in shutdown_executor ()
    at /opt/web/apache_php/source/php-4.3.4/Zend/zend_execute_API.c:213
#8  0xfe3612f8 in zend_deactivate ()
    at /opt/web/apache_php/source/php-4.3.4/Zend/zend.c:665
#9  0xfe306904 in php_request_shutdown (dummy=0x0)
    at /opt/web/apache_php/source/php-4.3.4/main/main.c:998
#10 0xfe383be8 in php_apache_request_dtor (r=0x187dd0)
    at /opt/web/apache_php/source/php-4.3.4/sapi/apache2handler/sapi_apache2.c:449
#11 0xfe3840b8 in php_handler (r=0x187dd0)
---Type <return> to continue, or q <return> to quit---
    at /opt/web/apache_php/source/php-4.3.4/sapi/apache2handler/sapi_apache2.c:553
#12 0x0004a37c in ap_run_handler (r=0x187dd0) at config.c:195 #13 0x0004a950 in ap_invoke_handler (r=0x187dd0) at config.c:401 #14 0x00037d60 in ap_process_request (r=0x187dd0) at http_request.c:288 #15 0x00033274 in ap_process_http_connection (c=0x169220) at http_core.c:293 #16 0x00055740 in ap_run_process_connection (c=0x169220) at connection.c:85 #17 0x00048b78 in child_main (child_num_arg=1470896) at prefork.c:694 #18 0x00048d70 in make_child (s=0x9bb80, slot=0) at prefork.c:734 #19 0x00048dfc in startup_children (number_to_start=4) at prefork.c:806 #20 0x0004962c in ap_mpm_run (_pconf=0x1, plog=0xd1558, s=0x9bb80)
    at prefork.c:1022
#21 0x0004f23c in main (argc=2, argv=0xffbefd1c) at main.c:660
(gdb) 


LOG ENTRY IN APACHE
----------------------
websrv01:/opt/web/apache_php/apache/logs% grep Segment error_log [Thu Nov 20 20:31:59 2003] [error] [client 200.30.7.100] Segmentation Fault - core dumped [Thu Nov 20 20:33:46 2003] [error] [client 200.30.7.100] Segmentation Fault - core dumped [Thu Nov 20 20:33:55 2003] [error] [client 200.30.7.100] Segmentation Fault - core dumped [Thu Nov 20 20:47:37 2003] [error] [client 200.30.7.100] Segmentation Fault - core dumped [Sun Nov 23 19:55:45 2003] [notice] child pid 4946 exit signal Segmentation fault (11) [Sun Nov 23 19:56:04 2003] [notice] child pid 6151 exit signal Segmentation fault (11) [Sun Nov 23 19:58:31 2003] [notice] child pid 6536 exit signal Segmentation fault (11) [Sun Nov 23 20:05:13 2003] [notice] child pid 7172 exit signal Segmentation fault (11) [Mon Nov 24 13:39:02 2003] [notice] child pid 27426 exit signal Segmentation fault (11)


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AllCommentsChangesGit/SVN commitsRelated reports
 [2003-11-25 14:18 UTC] sniper@php.net
Oops..I meant the Open reports.. :)
See bug #24531 which has some patch in it.
Try the patch..

 [2003-11-27 00:28 UTC] sniper@php.net
User reported that patch produced exact same backtrace as before. (PLEASE don't add that same bt anymore..)

 [2003-12-19 12:18 UTC] tony2001@php.net
yes, there is some troubles with thread safety in PHP_4_3 branch.
I'll ask Harald to port his changes from HEAD one more time.
could you, please, try latest PHP5 snapshot? it should be fixed there.
 [2004-01-15 01:29 UTC] sniper@php.net
Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip


 [2004-01-15 07:25 UTC] troy dot tinnes at motorola dot com
With the testing so far - PHP 5 installation appears to fix the problem.
 [2004-01-15 08:32 UTC] tony2001@php.net
ok, I'll try to make it work with 4.3.x soon.
 [2004-08-22 08:17 UTC] Troy dot Tinnes at motorola dot com
PHP 5 reduces the occurance of the problem - but problem still persists
 [2005-02-17 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".
 [2005-09-08 11:45 UTC] tony2001@php.net
The bug has been fixed in OCI8 v.1.1, which is available in CVS HEAD and PECL (use `pear install oci8-beta` to install it).
 
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