Re: Zend Engine 2 - ZTS Bugs Round 2

Do you have a short reproducing script? Do you think it's a problem with the memory management or does it just seem to be a bug which is appearing due to the changes? Thanks, Andi At 05:58 PM 6/5/2004 +0200, Stefan Esser wrote:

Hi, I have added a backtrace of a crash that occurs when a class function is destructed in ZTS. It seems I only saw this because of Hardened-PHP using globals. Since Andi disabled ZEND_MM on Win32 the same kind of errors should be seen on any Windows PHP installation (I guess). Between 4 and 2. The tsrm_ls value changes. This happens because zend_hash_del_key_or_index calls the destructor (in this case destroy_zend_function) with only one parameter. It does NOT call it with a valid tsrm_ls value. So it is filled with stack crap. Stefan #0 0x0814a899 in zend_llist_apply_with_argument (l=0x81e2440, func=0x814ad2c <zend_extension_op_array_dtor_handler>, arg=0x826c288, tsrm_ls=0x401be9dc) at /XXX/hardened-php/php5/php-5.0.0RC3RC2/Zend/zend_llist.c:322

       l = (zend_llist *) 0x81e2440
       arg = (void *) 0x826c288
       tsrm_ls = (void ***) 0x401be9dc
       element = (zend_llist_element *) 0x4024d890

#1 0x0814b1a4 in destroy_op_array (op_array=0x826c288, tsrm_ls=0x401be9dc) at /XXX/hardened-php/php5/php-5.0.0RC3RC2/Zend/zend_opcode.c:232

       op_array = (zend_op_array *) 0x826c288
       opline = (zend_op *) 0x4024d890
       end = (zend_op *) 0x4024d890
       i = 1076156560
#2  0x0814ae9a in destroy_zend_function (function=0x826c288, tsrm_ls=0x401be9dc)

at /XXX/hardened-php/php5/php-5.0.0RC3RC2/Zend/zend_opcode.c:103

       function = (zend_function *) 0x118
#3  0x081587dc in zend_hash_del_key_or_index (ht=0x81e6580, arKey=0x826ff30 "", nKeyLength=90, h=0, flag=0)

at /XXX/hardened-php/php5/php-5.0.0RC3RC2/Zend/zend_hash.c:485

       h = 280
       nIndex = 37
       p = (Bucket *) 0x826ff10
#4  0x08158d37 in zend_hash_reverse_apply (ht=0x81e6580, apply_func=0x8146f08 <is_not_internal_function>, tsrm_ls=0x81e2db0)

at /XXX/hardened-php/php5/php-5.0.0RC3RC2/Zend/zend_hash.c:733

       result = 1
       ht = (HashTable *) 0x81e6580
       p = (Bucket *) 0x826fde8
       q = (Bucket *) 0x3

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