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Bug #24729 $obj = new $className; causes crash when $className is not set
Submitted: 2003-07-20 14:58 UTC Modified: 2003-07-20 15:46 UTC
From: proton at fangen dot net Assigned: helly (profile)
Status: Closed Package: Scripting Engine problem
PHP Version: 5CVS-2003-07-20 (dev) OS: *
Private report: No CVE-ID: None
View Developer Edit
 [2003-07-20 14:58 UTC] proton at fangen dot net 
Description:
------------
Apache 2.0 / PHP 5-cvs crashes on Windows XP when trying to execute the following code if $className is not defined before it is used:

Reproduce code:
---------------
$c = new $className('whatever');

Expected result:
----------------
Fatal Error: Class '' was not found, or something like that

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 [2003-07-20 15:21 UTC] derick@php.net 
Reproduced, this is the backtrace (the error message IS shown first though):

#0  0x08280b67 in zend_str_tolower_copy (
---Type <return> to continue, or q <return> to quit---
    dest=0x84351ec "Z\204?\217*?\217*ZZZZZZZZA", source=0x0, length=0)
    at /dat/dev/php/php-5.0.0dev/Zend/zend_operators.c:1655
1655		*result = *end;
(gdb) bt
#0  0x08280b67 in zend_str_tolower_copy (
    dest=0x84351ec "Z\204?\217*?\217*ZZZZZZZZA", source=0x0, length=0)
    at /dat/dev/php/php-5.0.0dev/Zend/zend_operators.c:1655
#1  0x082a4d1f in zend_str_tolower_dup (source=0x0, length=0)
    at /dat/dev/php/php-5.0.0dev/Zend/zend_operators.h:206
#2  0x0829ff9f in zend_fetch_class_handler (execute_data=0xbfffd0e0, 
    op_array=0x842f80c) at /dat/dev/php/php-5.0.0dev/Zend/zend_execute.c:2374
#3  0x0829c66a in execute (op_array=0x842f80c)
    at /dat/dev/php/php-5.0.0dev/Zend/zend_execute.c:1252
#4  0x408166d2 in xdebug_execute (op_array=0x842f80c)
    at /dat/dev/php/xdebug/xdebug.c:766
#5  0x0828382b in zend_execute_scripts (type=8, retval=0x0, file_count=3)
    at /dat/dev/php/php-5.0.0dev/Zend/zend.c:1017
#6  0x08249b2c in php_execute_script (primary_file=0xbffff930)
    at /dat/dev/php/php-5.0.0dev/main/main.c:1695
#7  0x082aeea8 in main (argc=1, argv=0xbffff9d4)
    at /dat/dev/php/php-5.0.0dev/sapi/cli/php_cli.c:910
#8  0x406b4306 in __libc_start_main (main=0x82ae368 <main>, argc=1, 
    ubp_av=0xbffff9d4, init=0x808663c <_init>, fini=0x82afb10 <_fini>, 
    rtld_fini=0x4000d2dc <_dl_fini>, stack_end=0xbffff9cc)
    at ../sysdeps/generic/libc-start.c:129
 [2003-07-20 15:46 UTC] helly@php.net 
This bug has been fixed in CVS.

In case this was a PHP problem, snapshots of the sources are packaged
every three hours; this change will be in the next snapshot. You can
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In case this was a documentation problem, the fix will show up soon at
http://www.php.net/manual/.

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