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Bug 1140209

Summary: Segfault in garbage collection
Product: Red Hat Enterprise Linux 6 Reporter: Leonard den Ottolander <leonard-rh-bugzilla>
Component: phpAssignee: Remi Collet <rcollet>
Status: CLOSED WONTFIX QA Contact: BaseOS QE - Apps <qe-baseos-apps>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.5CC: jorton, rcollet
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of:
: 1140247 (view as bug list) Environment:
Last Closed: 2017-10-17 07:41:53 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1140247    
Attachments:
Description Flags
test case causing crash none

Description Leonard den Ottolander 2014-09-10 13:46:58 UTC 
Created attachment 936164 [details]
test case causing crash

Description of problem:

Segfault in garbage collection when running attached script.


Version-Release number of selected component (if applicable):

php-5.3.3-27.el6_5.1.x86_64


How reproducible:

Run attached script from the command line.


Steps to Reproduce:

ganon located in directory ganon (http://code.google.com/p/ganon)
directory files available
index.php and ganon-mod.php (attached)

$ php index.php


Actual results:

<snip>
dio_truncate
dio_write
Directories: ref.dir.php
Segmentation fault (core dumped)


Expected results:

No segfault.


Additional info:

CentOS 6.5 current.

(gdb) bt
#0  0x00000000005c5e29 in gc_zval_possible_root (zv=0x526ba68)
    at /usr/src/debug/php-5.3.3/Zend/zend_gc.c:143
#1  0x00000000005b4a1b in zend_hash_destroy (ht=0x27844e8)
    at /usr/src/debug/php-5.3.3/Zend/zend_hash.c:526
#2  0x00000000005c7419 in zend_object_std_dtor (object=0x2785108)
    at /usr/src/debug/php-5.3.3/Zend/zend_objects.c:45
#3  0x00000000005c7439 in zend_objects_free_object_storage (object=0x2785108)
    at /usr/src/debug/php-5.3.3/Zend/zend_objects.c:128
#4  0x00000000005cadfc in zend_objects_store_del_ref_by_handle_ex (
    handle=1516, handlers=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_objects_API.c:220
#5  0x00000000005c5988 in gc_collect_cycles ()
    at /usr/src/debug/php-5.3.3/Zend/zend_gc.c:703
#6  0x00000000005c5e74 in gc_zval_possible_root (zv=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_gc.c:166
#7  0x000000000062c774 in gc_zval_check_possible_root (
    execute_data=0x7f102330ace0) at /usr/src/debug/php-5.3.3/Zend/zend_gc.h:183
#8  zend_pzval_unlock_func (execute_data=0x7f102330ace0)
    at /usr/src/debug/php-5.3.3/Zend/zend_execute.c:80
#9  _get_zval_ptr_ptr_var (execute_data=0x7f102330ace0)
    at /usr/src/debug/php-5.3.3/Zend/zend_execute.c:292
#10 ZEND_ASSIGN_DIM_SPEC_VAR_CONST_HANDLER (execute_data=0x7f102330ace0)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:10332
#11 0x00000000005cd990 in execute (op_array=0x7f10232c5678)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#12 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#13 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#14 0x00000000005cd990 in execute (op_array=0x1b346e0)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#15 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#16 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#17 0x00000000005cd990 in execute (op_array=0x7f10232c4fe8)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#18 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#19 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#20 0x00000000005cd990 in execute (op_array=0x7f10232c57d8)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#21 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#22 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#23 0x00000000005cd990 in execute (op_array=0x1b42af0)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#24 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#25 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#26 0x00000000005cd990 in execute (op_array=0x7f10232c52a8)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#27 0x00007f102ab8b4b8 in xdebug_execute ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib64/php/modules/xdebug.so
#28 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#29 0x00000000005cd990 in execute (op_array=0x1af8e78)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#30 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#31 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#32 0x00000000005cd990 in execute (op_array=0x1b57818)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#33 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#34 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#35 0x00000000005cd990 in execute (op_array=0x1aea630)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#36 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#37 0x00000000005f6366 in zend_do_fcall_common_helper_SPEC (
    execute_data=<value optimized out>)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:340
#38 0x00000000005cd990 in execute (op_array=0x1ae9200)
    at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#39 0x00007f102ab8b4b8 in xdebug_execute ()
   from /usr/lib64/php/modules/xdebug.so
#40 0x00000000005a7b9d in zend_execute_scripts (type=8, retval=0x0, 
    file_count=3) at /usr/src/debug/php-5.3.3/Zend/zend.c:1235
#41 0x0000000000555c28 in php_execute_script (primary_file=0x7fff35e04900)
    at /usr/src/debug/php-5.3.3/main/main.c:2261
#42 0x0000000000631ff5 in main (argc=2, argv=0x7fff35e04b08)
    at /usr/src/debug/php-5.3.3/sapi/cli/php_cli.c:1192

Seems to be a known issue:

https://bugs.php.net/bug.php?id=64960

http://git.php.net/?p=php-src.git;a=commitdiff;h=3c87945c95c9c31986e690bb046c70e58c8d8896;hp=93e0d78ec655f59ebfa82b2c6f8486c43651c1d0
Comment 1 Leonard den Ottolander 2014-09-10 13:51:08 UTC 
To complete the test case you need the file "files/funcref.html" which is a copy of http://www.php.net/manual/en/funcref.php.
Comment 4 Leonard den Ottolander 2014-09-10 14:57:08 UTC 
php54 probably also affected as this segfault is also reproducible on CentOS 7 (bug #1140247).
Comment 6 Remi Collet 2014-12-19 08:12:51 UTC 
Could also be related to https://bugs.php.net/65372
Comment 10 Red Hat Bugzilla Rules Engine 2017-10-17 07:41:53 UTC 
Development Management has reviewed and declined this request. You may appeal this decision by reopening this request.