Bug #51946 [Fbk->Opn]: Segmentation Faults on postgres use in session handler.

From: Date: Thu, 03 Jun 2010 17:50:24 +0000
Subject: Bug #51946 [Fbk->Opn]: Segmentation Faults on postgres use in session handler.
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-151061@lists.php.net to get a copy of this message
Edit report at http://bugs.php.net/bug.php?id=51946&edit=1

 ID:               51946
 User updated by:  justin_burger at adp dot com
 Reported by:      justin_burger at adp dot com
-Summary:          Segmentation Faults on postgres function use.
+Summary:          Segmentation Faults on postgres  use in session
                   handler.
-Status:           Feedback
+Status:           Open
 Type:             Bug
 Package:          PostgreSQL related
 Operating System: CentOS release 5.4 (Final)
 PHP Version:      5.2.13

 New Comment:

This now seems isolated to the session handler use of postgres.


Previous Comments:
------------------------------------------------------------------------
[2010-06-03 19:49:09] justin_burger at adp dot com

I've done more research and confirmed that I can ONLY reproduce this
when using 
postgres as part of session management. executing the exact same SQL
outside of a 
session handler does not cause the fault.

------------------------------------------------------------------------
[2010-06-02 23:22:56] justin_burger at adp dot com

PG Version = 	8.3.9 

Your right, it looks like it's not happening 100% of the time during the
pg_connect. I created a somewhat simple script which causes the fault on
every other request. I am able to reproduce this on two different
servers. both running 5.2.13 with the 8.3.9 version of postgres.

Code to reproduce: http://pastebin.com/nfNJeyMw

Running this script gives me the following backtrace:
Core was generated by `/opt/adp/httpd/bin/httpd -X'.
Program terminated with signal 11, Segmentation fault.
#0  0x00002ac7d6ee1c20 in zend_mm_search_large_block (heap=0x151bdd50,
size=24) at /usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1753
1753                    if (ZEND_MM_FREE_BLOCK_SIZE(p) <
ZEND_MM_FREE_BLOCK_SIZE(best_fit)) {
(gdb) bt
#0  0x00002ac7d6ee1c20 in zend_mm_search_large_block (heap=0x151bdd50,
size=24) at /usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1753
#1  _zend_mm_alloc_int (heap=0x151bdd50, size=24) at
/usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1812
#2  0x00002ac7dcdd8e80 in zif_pg_query (ht=<value optimized out>,
return_value=0x15671350, return_value_ptr=<value optimized out>,
    this_ptr=<value optimized out>, return_value_used=<value optimized
out>) at /usr/src/debug/php-5.2.13/ext/pgsql/pgsql.c:1184
#3  0x00002ac7d6f1d582 in zend_do_fcall_common_helper_SPEC
(execute_data=0x7fff68c97af0) at
/usr/src/debug/php-5.2.13/Zend/zend_vm_execute.h:200
#4  0x00002ac7d6f1c73c in execute (op_array=0x155df890) at
/usr/src/debug/php-5.2.13/Zend/zend_vm_execute.h:92
#5  0x00002ac7d6ef1299 in zend_call_function (fci=0x7fff68c97cd0,
fci_cache=<value optimized out>) at
/usr/src/debug/php-5.2.13/Zend/zend_execute_API.c:1039
#6  0x00002ac7d6ef2386 in call_user_function_ex (function_table=<value
optimized out>, object_pp=<value optimized out>,
function_name=0x7274732061206e69,
    retval_ptr_ptr=0x1541dda0, param_count=1, params=0x0,
no_separation=1, symbol_table=0x0) at
/usr/src/debug/php-5.2.13/Zend/zend_execute_API.c:640
#7  0x00002ac7d6ef2406 in call_user_function (function_table=0x151bd640,
object_pp=0x0, function_name=0x15421298, retval_ptr=0x15642688,
param_count=2,
    params=0x7fff68c97dc0) at
/usr/src/debug/php-5.2.13/Zend/zend_execute_API.c:613
#8  0x00002ac7d6da5e25 in ps_call_handler (func=0x15421298, argc=2,
argv=0x7fff68c97dc0) at
/usr/src/debug/php-5.2.13/ext/session/mod_user.c:53
#9  0x00002ac7d6da6099 in ps_write_user (mod_data=<value optimized out>,
key=0x1560c698 "6c4u9vvv7b2hb5jh1bgg3916m6",
    val=0x156700a8
"CONNECTION_ID|s:2:\"QA\";USER_OBJECT|s:3667:\"O:4:\"user\":22:{s:17:\"",
vallen=3712)
    at /usr/src/debug/php-5.2.13/ext/session/mod_user.c:141
#10 0x00002ac7d6da2022 in php_session_save_current_state () at
/usr/src/debug/php-5.2.13/ext/session/session.c:550
#11 php_session_flush () at
/usr/src/debug/php-5.2.13/ext/session/session.c:1407
#12 0x00002ac7d6da22e9 in zm_deactivate_session (type=354147664,
module_number=5) at
/usr/src/debug/php-5.2.13/ext/session/session.c:2015
#13 0x00002ac7d6efddfc in module_registry_cleanup (module=<value
optimized out>) at /usr/src/debug/php-5.2.13/Zend/zend_API.c:1976
#14 0x00002ac7d6f06d84 in zend_hash_reverse_apply (ht=0x2ac7d74abb00,
apply_func=0x2ac7d6efdde0 <module_registry_cleanup>)
    at /usr/src/debug/php-5.2.13/Zend/zend_hash.c:755
#15 0x00002ac7d6efc47d in zend_deactivate_modules () at
/usr/src/debug/php-5.2.13/Zend/zend.c:838
#16 0x00002ac7d6eb944a in php_request_shutdown (dummy=<value optimized
out>) at /usr/src/debug/php-5.2.13/main/main.c:1478
#17 0x00002ac7d6f80b9e in php_apache_request_dtor (r=0x15458be0) at
/usr/src/debug/php-5.2.13/sapi/apache2handler/sapi_apache2.c:479
#18 php_handler (r=0x15458be0) at
/usr/src/debug/php-5.2.13/sapi/apache2handler/sapi_apache2.c:651
#19 0x00000000004362ea in ap_run_handler (r=0x15458be0) at config.c:157
#20 0x000000000043952c in ap_invoke_handler (r=0x15458be0) at
config.c:372
#21 0x0000000000443b58 in ap_process_request (r=0x15458be0) at
http_request.c:282
#22 0x0000000000440efc in ap_process_http_connection (c=0x1544ed80) at
http_core.c:190
#23 0x000000000043d202 in ap_run_process_connection (c=0x1544ed80) at
connection.c:43
#24 0x0000000000447a90 in child_main (child_num_arg=<value optimized
out>) at prefork.c:662
#25 0x0000000000447c93 in make_child (s=0x1509b848, slot=0) at
prefork.c:702
#26 0x0000000000448866 in ap_mpm_run (_pconf=<value optimized out>,
plog=<value optimized out>, s=0x1509b848) at prefork.c:978
#27 0x0000000000423e98 in main (argc=2, argv=0x7fff68c98848) at
main.c:740

------------------------------------------------------------------------
[2010-05-28 19:56:58] johannes@php.net

Your stackttrace shows that pg_query() is being called. Sure
pg_connect() is enough to get a crash? - In the later case I would have
expected way more results.

While at it please also mention the version nuumber of pgsql you are
using. Thanks.

------------------------------------------------------------------------
[2010-05-28 19:35:19] justin_burger at adp dot com

Description:
------------
I'm able to reproduce this issue 100% of the time when using pg_connect
or pg_query. I've tested with all other extensions turned off and see
the same result. The only way I can prevent this segmentation fault is
to turn off Zend_MM (which is obviously not a solution).

Core was generated by `/opt/adp/httpd/bin/httpd -X'.
Program terminated with signal 11, Segmentation fault.
#0  0x00002ac7d6ee1c20 in zend_mm_search_large_block (heap=0x151bdd50,
size=24)
    at /usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1753
1753                    if (ZEND_MM_FREE_BLOCK_SIZE(p) <
ZEND_MM_FREE_BLOCK_SIZE                                                 
                           (best_fit)) {
(gdb) bt
#0  0x00002ac7d6ee1c20 in zend_mm_search_large_block (heap=0x151bdd50,
size=24)
    at /usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1753
#1  _zend_mm_alloc_int (heap=0x151bdd50, size=24)
    at /usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1812
#2  0x00002ac7dcdd8e80 in zif_pg_query (ht=<value optimized out>,
    return_value=0x15671350, return_value_ptr=<value optimized out>,
    this_ptr=<value optimized out>, return_value_used=<value optimized
out>)
    at /usr/src/debug/php-5.2.13/ext/pgsql/pgsql.c:1184
#3  0x00002ac7d6f1d582 in zend_do_fcall_common_helper_SPEC (
    execute_data=0x7fff68c97af0)
    at /usr/src/debug/php-5.2.13/Zend/zend_vm_execute.h:200
#4  0x00002ac7d6f1c73c in execute (op_array=0x155df890)
    at /usr/src/debug/php-5.2.13/Zend/zend_vm_execute.h:92
#5  0x00002ac7d6ef1299 in zend_call_function (fci=0x7fff68c97cd0,
    fci_cache=<value optimized out>)
    at /usr/src/debug/php-5.2.13/Zend/zend_execute_API.c:1039
#6  0x00002ac7d6ef2386 in call_user_function_ex (
    function_table=<value optimized out>, object_pp=<value optimized
out>,
    function_name=0x7274732061206e69, retval_ptr_ptr=0x1541dda0,
    param_count=1, params=0x0, no_separation=1, symbol_table=0x0)
    at /usr/src/debug/php-5.2.13/Zend/zend_execute_API.c:640
#7  0x00002ac7d6ef2406 in call_user_function
(function_table=0x151bd640,
    object_pp=0x0, function_name=0x15421298, retval_ptr=0x15642688,


Test script:
---------------
any pg_connect call results in a segmentation fault.

Expected result:
----------------
connection to postgres, rather than a connection refused.

Actual result:
--------------
Loaded symbols for /opt/adp/httpd/modules/mod_env.so
Reading symbols from /opt/adp/httpd/modules/mod_mime_magic.so...Reading
symbols                                                                 
            from
/usr/lib/debug/opt/adp/httpd/modules/mod_mime_magic.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_mime_magic.so
Reading symbols from /opt/adp/httpd/modules/mod_cern_meta.so...Reading
symbols f                                                               
             rom
/usr/lib/debug/opt/adp/httpd/modules/mod_cern_meta.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_cern_meta.so
Reading symbols from /opt/adp/httpd/modules/mod_expires.so...Reading
symbols fro                                                             
               m
/usr/lib/debug/opt/adp/httpd/modules/mod_expires.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_expires.so
Reading symbols from /opt/adp/httpd/modules/mod_headers.so...Reading
symbols fro                                                             
               m
/usr/lib/debug/opt/adp/httpd/modules/mod_headers.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_headers.so
Reading symbols from /opt/adp/httpd/modules/mod_ident.so...Reading
symbols from                                                            
                
/usr/lib/debug/opt/adp/httpd/modules/mod_ident.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_ident.so
Reading symbols from /opt/adp/httpd/modules/mod_usertrack.so...Reading
symbols f                                                               
             rom
/usr/lib/debug/opt/adp/httpd/modules/mod_usertrack.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_usertrack.so
Reading symbols from /opt/adp/httpd/modules/mod_unique_id.so...Reading
symbols f                                                               
             rom
/usr/lib/debug/opt/adp/httpd/modules/mod_unique_id.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_unique_id.so
Reading symbols from /opt/adp/httpd/modules/mod_setenvif.so...Reading
symbols fr                                                              
              om
/usr/lib/debug/opt/adp/httpd/modules/mod_setenvif.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_setenvif.so
Reading symbols from /opt/adp/httpd/modules/mod_version.so...Reading
symbols fro                                                             
               m
/usr/lib/debug/opt/adp/httpd/modules/mod_version.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_version.so
Reading symbols from /opt/adp/httpd/modules/mod_ssl.so...Reading symbols
from /u                                                                 
           sr/lib/debug/opt/adp/httpd/modules/mod_ssl.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_ssl.so
Reading symbols from /lib64/libssl.so.6...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libssl.so.6
Reading symbols from /lib64/libcrypto.so.6...(no debugging symbols
found)...done                                                           
                 .
Loaded symbols for /lib64/libcrypto.so.6
Reading symbols from /usr/lib64/libgssapi_krb5.so.2...(no debugging
symbols foun                                                            
                d)...done.
Loaded symbols for /usr/lib64/libgssapi_krb5.so.2
Reading symbols from /usr/lib64/libkrb5.so.3...(no debugging symbols
found)...do                                                             
               ne.
Loaded symbols for /usr/lib64/libkrb5.so.3
Reading symbols from /lib64/libcom_err.so.2...(no debugging symbols
found)...don                                                            
                e.
Loaded symbols for /lib64/libcom_err.so.2
Reading symbols from /usr/lib64/libk5crypto.so.3...(no debugging symbols
found).                                                                 
           ..done.
Loaded symbols for /usr/lib64/libk5crypto.so.3
Reading symbols from /usr/lib64/libkrb5support.so.0...(no debugging
symbols foun                                                            
                d)...done.
Loaded symbols for /usr/lib64/libkrb5support.so.0
Reading symbols from /lib64/libkeyutils.so.1...(no debugging symbols
found)...do                                                             
               ne.
Loaded symbols for /lib64/libkeyutils.so.1
Reading symbols from /lib64/libresolv.so.2...(no debugging symbols
found)...done                                                           
                 .
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/libselinux.so.1...(no debugging symbols
found)...don                                                            
                e.
Loaded symbols for /lib64/libselinux.so.1
Reading symbols from /lib64/libsepol.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libsepol.so.1
Reading symbols from /opt/adp/httpd/modules/mod_mime.so...Reading
symbols from /                                                          
                 
usr/lib/debug/opt/adp/httpd/modules/mod_mime.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_mime.so
Reading symbols from /opt/adp/httpd/modules/mod_dav.so...Reading symbols
from /u                                                                 
           sr/lib/debug/opt/adp/httpd/modules/mod_dav.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_dav.so
Reading symbols from /opt/adp/httpd/modules/mod_status.so...Reading
symbols from                                                            
                
/usr/lib/debug/opt/adp/httpd/modules/mod_status.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_status.so
Reading symbols from /opt/adp/httpd/modules/mod_autoindex.so...Reading
symbols f                                                               
             rom
/usr/lib/debug/opt/adp/httpd/modules/mod_autoindex.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_autoindex.so
Reading symbols from /opt/adp/httpd/modules/mod_asis.so...Reading
symbols from /                                                          
                 
usr/lib/debug/opt/adp/httpd/modules/mod_asis.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_asis.so
Reading symbols from /opt/adp/httpd/modules/mod_info.so...Reading
symbols from /                                                          
                 
usr/lib/debug/opt/adp/httpd/modules/mod_info.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_info.so
Reading symbols from /opt/adp/httpd/modules/mod_cgi.so...Reading symbols
from /u                                                                 
           sr/lib/debug/opt/adp/httpd/modules/mod_cgi.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_cgi.so
Reading symbols from /opt/adp/httpd/modules/mod_dav_fs.so...Reading
symbols from                                                            
                
/usr/lib/debug/opt/adp/httpd/modules/mod_dav_fs.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_dav_fs.so
Reading symbols from /opt/adp/httpd/modules/mod_vhost_alias.so...Reading
symbols                                                                 
            from
/usr/lib/debug/opt/adp/httpd/modules/mod_vhost_alias.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_vhost_alias.so
Reading symbols from /opt/adp/httpd/modules/mod_negotiation.so...Reading
symbols                                                                 
            from
/usr/lib/debug/opt/adp/httpd/modules/mod_negotiation.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_negotiation.so
Reading symbols from /opt/adp/httpd/modules/mod_dir.so...Reading symbols
from /u                                                                 
           sr/lib/debug/opt/adp/httpd/modules/mod_dir.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_dir.so
Reading symbols from /opt/adp/httpd/modules/mod_imagemap.so...Reading
symbols fr                                                              
              om
/usr/lib/debug/opt/adp/httpd/modules/mod_imagemap.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_imagemap.so
Reading symbols from /opt/adp/httpd/modules/mod_actions.so...Reading
symbols fro                                                             
               m
/usr/lib/debug/opt/adp/httpd/modules/mod_actions.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_actions.so
Reading symbols from /opt/adp/httpd/modules/mod_speling.so...Reading
symbols fro                                                             
               m
/usr/lib/debug/opt/adp/httpd/modules/mod_speling.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_speling.so
Reading symbols from /opt/adp/httpd/modules/mod_userdir.so...Reading
symbols fro                                                             
               m
/usr/lib/debug/opt/adp/httpd/modules/mod_userdir.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_userdir.so
Reading symbols from /opt/adp/httpd/modules/mod_alias.so...Reading
symbols from                                                            
                
/usr/lib/debug/opt/adp/httpd/modules/mod_alias.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_alias.so
Reading symbols from /opt/adp/httpd/modules/mod_rewrite.so...Reading
symbols fro                                                             
               m
/usr/lib/debug/opt/adp/httpd/modules/mod_rewrite.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/mod_rewrite.so
Reading symbols from /opt/adp/httpd/modules/libphp5.so...Reading symbols
from /u                                                                 
           sr/lib/debug/opt/adp/httpd/modules/libphp5.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/modules/libphp5.so
Reading symbols from /usr/lib64/libexslt.so.0...(no debugging symbols
found)...d                                                              
              one.
Loaded symbols for /usr/lib64/libexslt.so.0
Reading symbols from /usr/lib64/libmcrypt.so.4...(no debugging symbols
found)...                                                               
             done.
Loaded symbols for /usr/lib64/libmcrypt.so.4
Reading symbols from /usr/lib64/libltdl.so.3...(no debugging symbols
found)...do                                                             
               ne.
Loaded symbols for /usr/lib64/libltdl.so.3
Reading symbols from /usr/lib64/libt1.so.5...(no debugging symbols
found)...done                                                           
                 .
Loaded symbols for /usr/lib64/libt1.so.5
Reading symbols from /usr/lib64/libfreetype.so.6...(no debugging symbols
found).                                                                 
           ..done.
Loaded symbols for /usr/lib64/libfreetype.so.6
Reading symbols from /usr/lib64/libpng12.so.0...(no debugging symbols
found)...d                                                              
              one.
Loaded symbols for /usr/lib64/libpng12.so.0
Reading symbols from /usr/lib64/libjpeg.so.62...(no debugging symbols
found)...d                                                              
              one.
Loaded symbols for /usr/lib64/libjpeg.so.62
Reading symbols from /usr/lib64/libgdbm.so.2...(no debugging symbols
found)...do                                                             
               ne.
Loaded symbols for /usr/lib64/libgdbm.so.2
Reading symbols from /usr/lib64/libcurl.so.3...(no debugging symbols
found)...do                                                             
               ne.
Loaded symbols for /usr/lib64/libcurl.so.3
Reading symbols from /usr/lib64/libbz2.so.1...(no debugging symbols
found)...don                                                            
                e.
Loaded symbols for /usr/lib64/libbz2.so.1
Reading symbols from /lib64/libnsl.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /usr/lib64/libxml2.so.2...(no debugging symbols
found)...do                                                             
               ne.
Loaded symbols for /usr/lib64/libxml2.so.2
Reading symbols from /usr/lib64/libidn.so.11...(no debugging symbols
found)...do                                                             
               ne.
Loaded symbols for /usr/lib64/libidn.so.11
Reading symbols from /usr/lib64/libnetsnmp.so.10...(no debugging symbols
found).                                                                 
           ..done.
Loaded symbols for /usr/lib64/libnetsnmp.so.10
Reading symbols from /lib64/libwrap.so.0...(no debugging symbols
found)...done.
Loaded symbols for /lib64/libwrap.so.0
Reading symbols from /usr/lib64/libxslt.so.1...(no debugging symbols
found)...do                                                             
               ne.
Loaded symbols for /usr/lib64/libxslt.so.1
Reading symbols from /usr/lib64/libgcrypt.so.11...(no debugging symbols
found)..                                                                
            .done.
Loaded symbols for /usr/lib64/libgcrypt.so.11
Reading symbols from /usr/lib64/libgpg-error.so.0...(no debugging
symbols found)                                                          
                  ...done.
Loaded symbols for /usr/lib64/libgpg-error.so.0
Reading symbols from /opt/adp/httpd/lib/php/modules/pgsql.so...Reading
symbols f                                                               
             rom
/usr/lib/debug/opt/adp/httpd/lib/php/modules/pgsql.so.debug...done.
done.
Loaded symbols for /opt/adp/httpd/lib/php/modules/pgsql.so
Reading symbols from /usr/lib64/libpq.so.5...Reading symbols from
/usr/lib/debug                                                          
                  /usr/lib64/libpq.so.5.1.debug...done.
done.
Loaded symbols for /usr/lib64/libpq.so.5
Reading symbols from /usr/lib64/libldap_r-2.3.so.0...(no debugging
symbols found                                                           
                 )...done.
Loaded symbols for /usr/lib64/libldap_r-2.3.so.0
Reading symbols from /usr/lib64/liblber-2.3.so.0...(no debugging symbols
found).                                                                 
           ..done.
Loaded symbols for /usr/lib64/liblber-2.3.so.0
Reading symbols from /usr/lib64/libsasl2.so.2...(no debugging symbols
found)...d                                                              
              one.
Loaded symbols for /usr/lib64/libsasl2.so.2
Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols
found)...d                                                              
              one.
Loaded symbols for /lib64/libnss_files.so.2

Core was generated by `/opt/adp/httpd/bin/httpd -X'.
Program terminated with signal 11, Segmentation fault.
#0  0x00002ac7d6ee1c20 in zend_mm_search_large_block (heap=0x151bdd50,
size=24)
    at /usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1753
1753                    if (ZEND_MM_FREE_BLOCK_SIZE(p) <
ZEND_MM_FREE_BLOCK_SIZE                                                 
                           (best_fit)) {
(gdb) bt
#0  0x00002ac7d6ee1c20 in zend_mm_search_large_block (heap=0x151bdd50,
size=24)
    at /usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1753
#1  _zend_mm_alloc_int (heap=0x151bdd50, size=24)
    at /usr/src/debug/php-5.2.13/Zend/zend_alloc.c:1812
#2  0x00002ac7dcdd8e80 in zif_pg_query (ht=<value optimized out>,
    return_value=0x15671350, return_value_ptr=<value optimized out>,
    this_ptr=<value optimized out>, return_value_used=<value optimized
out>)
    at /usr/src/debug/php-5.2.13/ext/pgsql/pgsql.c:1184
#3  0x00002ac7d6f1d582 in zend_do_fcall_common_helper_SPEC (
    execute_data=0x7fff68c97af0)
    at /usr/src/debug/php-5.2.13/Zend/zend_vm_execute.h:200
#4  0x00002ac7d6f1c73c in execute (op_array=0x155df890)
    at /usr/src/debug/php-5.2.13/Zend/zend_vm_execute.h:92
#5  0x00002ac7d6ef1299 in zend_call_function (fci=0x7fff68c97cd0,
    fci_cache=<value optimized out>)
    at /usr/src/debug/php-5.2.13/Zend/zend_execute_API.c:1039
#6  0x00002ac7d6ef2386 in call_user_function_ex (
    function_table=<value optimized out>, object_pp=<value optimized
out>,
    function_name=0x7274732061206e69, retval_ptr_ptr=0x1541dda0,
    param_count=1, params=0x0, no_separation=1, symbol_table=0x0)
    at /usr/src/debug/php-5.2.13/Zend/zend_execute_API.c:640
#7  0x00002ac7d6ef2406 in call_user_function
(function_table=0x151bd640,
    object_pp=0x0, function_name=0x15421298, retval_ptr=0x15642688,



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



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Edit this bug report at http://bugs.php.net/bug.php?id=51946&edit=1


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