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Bug #37612 Segfault - infinite recursion
Submitted: 2006-05-27 11:16 UTC Modified: 2006-05-27 12:27 UTC
From: kevin at oceania dot net Assigned:
Status: Not a bug Package: Reproducible crash
PHP Version: 6, 5.2.0-cvs OS: Linux
Private report: No CVE-ID: None
View Developer Edit
 [2006-05-27 11:16 UTC] kevin at oceania dot net 
Description:
------------
... infinite recursion
[Sat May 27 21:42:49 2006] [notice] child pid 10096 exit signal Segmentation fault (11)
[Sat May 27 21:42:49 2006] [notice] child pid 10097 exit signal Segmentation fault (11)



Reproduce code:
---------------
http://phpro.org/segfault.phps

Expected result:
----------------
output html table

Actual result:
--------------
(gdb) bt
#0 0x00bd5f1f in _int_malloc () from /lib/tls/libc.so.6
#1 0x00bd7f81 in malloc () from /lib/tls/libc.so.6
#2 0xf61f206b in _emalloc (size=44, __zend_filename=0xf634e1a0 "/home/kevin/html/php/dev/php5.2-200605230630/Zend/zend_vm_execute.h", __zend_lineno=225, __zend_orig_filename=0x0, __zend_orig_lineno=0) at /home/kevin/html/php/dev/php5.2-200605230630/Zend/zend_alloc.c:182
#3 0xf622947b in zend_do_fcall_common_helper_SPEC (execute_data=0xfe34a200) at zend_vm_execute.h:225
#4 0xf6229fa0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER (execute_data=0xfe34a200) at zend_vm_execute.h:322
#5 0xf6228fd2 in execute (op_array=0xa157704) at zend_vm_execute.h:92
#6 0xf62294e8 in zend_do_fcall_common_helper_SPEC (execute_data=0xfe34a350) at zend_vm_execute.h:234
#7 0xf6229fa0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER (execute_data=0xfe34a350) at zend_vm_execute.h:322
#8 0xf6228fd2 in execute (op_array=0xa157704) at zend_vm_execute.h:92
#9 0xf62294e8 in zend_do_fcall_common_helper_SPEC (execute_data=0xfe34a4a0) at zend_vm_execute.h:234

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 [2006-05-27 12:14 UTC] bjori@php.net 
Shorter reproducible code:
<?php
class foo {
 public function bar() {
  return $this->bar();
 }
}
$foo = new foo();
$foo->bar();
?>
 [2006-05-27 12:27 UTC] tony2001@php.net 
Yes, smashing the stack produces segfault and this is expected.
 
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