Edit report at http://bugs.php.net/bug.php?id=52613&edit=1
ID: 52613 Updated by: and...@php.net Reported by: manuel at mausz dot at Summary: crash in mysqlnd -Status: Assigned +Status: Feedback Type: Bug Package: MySQL related Operating System: Unix PHP Version: 5.3.3 Assigned To: andrey Block user comment: N New Comment: If PHP hits the memory limit then mysqlnd loses all control, because Zend takes it. Can you show more information about the crash? Just the bt, without line numbers doesn't help. valgrind output will be even better. Previous Comments: ------------------------------------------------------------------------ [2010-08-15 17:45:22] manuel at mausz dot at Description: ------------ mysqlnd trys to free memory which must not be valid (e.g. if memory_limit prevents that) Test script: --------------- * create a database table with a bunch of string-columns and fill in a lot of data * write a php script which fetches the content of the whole table and stores the content in an array * run the php script in a shell loop which increases the memory limit by a few kB per step. e.g: for i in $(seq 1 100); do let mem=$i*100000; echo $mem; ./sapi/cli/php -dmemory_limit=$mem crash.php; done Expected result: ---------------- no crash Actual result: -------------- (gdb) bt #0 0x0838b494 in mysqlnd_palloc_zval_ptr_dtor () #1 0x0838bbc2 in php_mysqlnd_res_free_buffered_data_pub () #2 0x0838be4a in php_mysqlnd_res_free_result_buffers_pub () #3 0x0838bf4f in mysqlnd_internal_free_result_contents () #4 0x0838bfa8 in mysqlnd_internal_free_result () #5 0x0838f984 in php_mysqlnd_res_free_result_pub () #6 0x081ef818 in _free_mysql_result () #7 0x08408ecc in list_entry_destructor () #8 0x08406e2f in zend_hash_apply_deleter () #9 0x08406f13 in zend_hash_graceful_reverse_destroy () #10 0x0840902e in zend_destroy_rsrc_list () #11 0x083fa116 in zend_deactivate () #12 0x0839adfb in php_request_shutdown () #13 0x084b6b22 in main () ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=52613&edit=1
