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Bug #24658 class hints with array_walk() causing crash
Submitted: 2003-07-15 01:09 UTC Modified: 2003-08-04 03:46 UTC
Votes:1
Avg. Score:4.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: eric at cosky dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 5CVS-20030718 OS: irrelevant
Private report: No CVE-ID: None
View Add Comment Developer Edit
 [2003-07-15 01:09 UTC] eric at cosky dot com 
Description:
------------
The following code crashes my install of PHP from July 13, 2003. Removing the class hint in BoomWalker eliminates the crash.

Reproduce code:
---------------
class SomeClass {}
class CrashClass {
	function Boom()
	{
		$a = array( 0,1,2 );
		array_walk(&$a, "BoomWalker", &$this);
	}
}
function BoomWalker(SomeClass &$arrayItem, &$key, &$crashObj) {}
$c = new CrashClass;
$c->Boom();


Expected result:
----------------
Nothing.

Actual result:
--------------
System alert for PHP crashing.

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 [2003-07-18 00:08 UTC] sniper@php.net 
Backtrace:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1024 (runnable)]
0x817b4fc in zend_assign_to_variable_reference (result=0x4029dee0, variable_ptr_ptr=0x4029a940, 
    value_ptr_ptr=0x4028f9d8, Ts=0x0) at /usr/src/web/php/php5/Zend/zend_execute.c:238
238                     T(result->u.var).var.ptr_ptr = variable_ptr_ptr;
(gdb) bt
#0  0x817b4fc in zend_assign_to_variable_reference (result=0x4029dee0, variable_ptr_ptr=0x4029a940, 
    value_ptr_ptr=0x4028f9d8, Ts=0x0) at /usr/src/web/php/php5/Zend/zend_execute.c:238
#1  0x8197be9 in zend_recv_handler (execute_data=0xbfffccec, op_array=0x8244858)
    at /usr/src/web/php/php5/Zend/zend_execute.c:2988
#2  0x817e77e in execute (op_array=0x8244858) at /usr/src/web/php/php5/Zend/zend_execute.c:1194
#3  0x815c0f1 in fast_call_user_function (function_table=0x81e9c78, object_pp=0x0, function_name=0x4029cec4, 
    retval_ptr_ptr=0xbfffce44, param_count=3, params=0xbfffce5c, no_separation=0, symbol_table=0x0, 
    function_pointer=0x81e516c) at /usr/src/web/php/php5/Zend/zend_execute_API.c:693
#4  0x80cc434 in php_array_walk (target_hash=0x4029cd1c, userdata=0x4028f9cc, recursive=0)
    at /usr/src/web/php/php5/ext/standard/array.c:990
#5  0x80cc5ff in zif_array_walk (ht=3, return_value=0x4029cf24, this_ptr=0x0, return_value_used=0)
    at /usr/src/web/php/php5/ext/standard/array.c:1045
#6  0x8195cdf in zend_do_fcall_common_helper (execute_data=0xbfffd03c, op_array=0x4029dc84)
    at /usr/src/web/php/php5/Zend/zend_execute.c:2634
#7  0x8196384 in zend_do_fcall_handler (execute_data=0xbfffd03c, op_array=0x4029dc84)
    at /usr/src/web/php/php5/Zend/zend_execute.c:2763
#8  0x817e77e in execute (op_array=0x4029dc84) at /usr/src/web/php/php5/Zend/zend_execute.c:1194
#9  0x8195dd1 in zend_do_fcall_common_helper (execute_data=0xbfffd28c, op_array=0x4029a8b4)
    at /usr/src/web/php/php5/Zend/zend_execute.c:2661
#10 0x8196128 in zend_do_fcall_by_name_handler (execute_data=0xbfffd28c, op_array=0x4029a8b4)
    at /usr/src/web/php/php5/Zend/zend_execute.c:2732
#11 0x817e77e in execute (op_array=0x4029a8b4) at /usr/src/web/php/php5/Zend/zend_execute.c:1194
#12 0x816589f in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/src/web/php/php5/Zend/zend.c:1017
#13 0x8133255 in php_execute_script (primary_file=0xbffff628) at /usr/src/web/php/php5/main/main.c:1695
#14 0x81a1614 in main (argc=2, argv=0xbffff694) at /usr/src/web/php/php5/sapi/cli/php_cli.c:910
#15 0x401b19cb in __libc_start_main (main=0x81a099c <main>, argc=2, argv=0xbffff694, init=0x806a744 <_init>, 
    fini=0x81a1fe4 <_fini>, rtld_fini=0x4000aea0 <_dl_fini>, stack_end=0xbffff68c)
    at ../sysdeps/generic/libc-start.c:92
 [2003-08-04 03:46 UTC] zeev@php.net 
This bug has been fixed in CVS.

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