Edit report at http://bugs.php.net/bug.php?id=52368&edit=1
ID: 52368 Updated by: fel...@php.net Reported by: cobexer at gmail dot com Summary: crash in preg_replace_impl Status: Feedback Type: Bug Package: PCRE related Operating System: Debian Lenny (5.0.5) PHP Version: 5.2.13 Block user comment: N New Comment: Please try using this snapshot: http://snaps.php.net/php5.3-latest.tar.gz For Windows: http://windows.php.net/snapshots/ Previous Comments: ------------------------------------------------------------------------ [2010-07-30 21:24:40] cobexer at gmail dot com hmm that crash is hard to nail down, it doesn't crash on all of my computers, therefore i did the following: * created crashing test script (currently ~150 Lines) * compiled php 5.2.14 (with -O0) (in /php) on a i586 openSUSE Factory(a bit newer than 11.3) * created a core dump * tar'gz ed it together and uploaded that to http://gomorrah-online.de/php-5.2.14-crash.tar.gz important contents: scrash.php : the php script with the code to crash (run with php -e) scrash.php.log : the output of the script till it crashed php-bt.txt : output of "bt" and "bt full" core : the coredump itself maybe that helps already, regards cobexer ------------------------------------------------------------------------ [2010-07-18 19:39:03] fel...@php.net Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. ------------------------------------------------------------------------ [2010-07-17 23:48:30] cobexer at gmail dot com Description: ------------ the crash occuring is most likely related to very high integer/double values(>10M) being inserted in a long string(~20K). the problem does not occur on PHP5.3.something so it might be a simple backport :). unless somebody can tell me how i get more information out of the crashing process this is all i have (trying to print local variables of the crashing function results in: (gdb) p **regex Cannot access memory at address 0x686f72393438343e os similar the regular expression involved is most likely: '/\{([A-Z0-9_]*)(?:\|(?P<escaper>[A-Z0-9_]+))?\}/' executed by preg_replace_callback, where the callback is an array('class_name', 'some_private_function') if required i try to build a small test script and attach that - but i guess its not required. probably related to http://bugs.php.net/bug.php?id=39016 reproducible: always Test script: --------------- <?php //no test script currently available ?> Expected result: ---------------- no php crash correctly replaced string Actual result: -------------- Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7f877c078750 (LWP 6259)] preg_replace_impl (ht=5, return_value=0x12a8a90, return_value_ptr=0x137c970, this_ptr=0xb9e82fb02f28a27c, return_value_used=0, is_callable_replace=0 '\0') at /usr/src/php5/source/php5-5.2.13/Zend/zend_variables.h:32 warning: Source file is more recent than executable. 32 if (zvalue->type <= IS_BOOL) { (gdb) bt #0 preg_replace_impl (ht=5, return_value=0x12a8a90, return_value_ptr=0x137c970, this_ptr=0xb9e82fb02f28a27c, return_value_used=0, is_callable_replace=0 '\0') at /usr/src/php5/source/php5-5.2.13/Zend/zend_variables.h:32 #1 0x00007f8774cef3cd in zend_do_fcall_common_helper_SPEC (execute_data=0x7fffffff5410) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:200 #2 0x00007f8774cd8134 in execute (op_array=0xf02040) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:92 #3 0x00007f8774ceecde in zend_do_fcall_common_helper_SPEC (execute_data=0x7fffffff5760) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:234 #4 0x00007f8774cd8134 in execute (op_array=0xef48b0) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:92 #5 0x00007f8774ceecde in zend_do_fcall_common_helper_SPEC (execute_data=0x7fffffff5e70) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:234 #6 0x00007f8774cd8134 in execute (op_array=0xf03780) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:92 #7 0x00007f8774ceecde in zend_do_fcall_common_helper_SPEC (execute_data=0x7fffffff6330) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:234 #8 0x00007f8774cd8134 in execute (op_array=0xf02c90) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:92 #9 0x00007f8774ceecde in zend_do_fcall_common_helper_SPEC (execute_data=0x7fffffff9ac0) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:234 #10 0x00007f8774cd8134 in execute (op_array=0xa2aa70) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:92 #11 0x00007f8774cb41c8 in zend_execute_scripts (type=32767, retval=0x0, file_count=-25624) at /usr/src/php5/source/php5-5.2.13/Zend/zend.c:1215 #12 0x00007f8774c6e0ea in php_execute_script (primary_file=Cannot access memory at address 0x8000ffff8b50 ) at /usr/src/php5/source/php5-5.2.13/main/main.c:2058 #13 0x00007f8774d2aa73 in php_handler (r=0x7f877423690a) at /usr/src/php5/source/php5-5.2.13/sapi/apache2handler/sapi_apache2.c:643 #14 0x0000000000438f73 in ap_run_handler (r=0xecc9a8) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/server/config.c:159 #15 0x000000000043c53f in ap_invoke_handler (r=0xecc9a8) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/server/config.c:373 #16 0x000000000044970e in ap_process_request (r=0xecc9a8) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/modules/http/http_request.c:258 #17 0x0000000000446838 in ap_process_http_connection (c=0xdfec88) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/modules/http/http_core.c:190 #18 0x0000000000440493 in ap_run_process_connection (c=0xdfec88) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/server/connection.c:43 #19 0x000000000044dd10 in child_main (child_num_arg=<value optimized out>) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/server/mpm/prefork/prefork.c:680 #20 0x000000000044e064 in make_child (s=0x675968, slot=1) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/server/mpm/prefork/prefork.c:777 #21 0x000000000044e60c in ap_mpm_run (_pconf=<value optimized out>, plog=<value optimized out>, s=0x675968) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/server/mpm/prefork/prefork.c:795 #22 0x0000000000425be5 in main (argc=3, argv=0x7fffffffc558) at /build/buildd-apache2_2.2.9-10+lenny8-amd64-OpzZ7v/apache2-2.2.9/server/main.c:732 (gdb) bt full #0 preg_replace_impl (ht=5, return_value=0x12a8a90, return_value_ptr=0x137c970, this_ptr=0xb9e82fb02f28a27c, return_value_used=0, is_callable_replace=0 '\0') at /usr/src/php5/source/php5-5.2.13/Zend/zend_variables.h:32 regex = (zval **) 0xa155b0 replace = (zval **) 0xa155b8 subject = (zval **) 0xa155c0 limit = (zval **) 0x7f8774cd1a4d subject_entry = (zval **) 0xa155c8 zcount = (zval **) 0x7f8774d1b868 result = 0x12a8a08 "�\220*\001" result_len = 0 limit_val = -1 string_key = 0x10 <Address 0x10 out of bounds> num_key = 19345208 callback_name = 0xef2b88 "pE9\001" replace_count = 10573224 replace_count_ptr = (int *) 0x7fffffff4cd0 #1 0x00007f8774cef3cd in zend_do_fcall_common_helper_SPEC (execute_data=0x7fffffff5410) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:200 return_reference = 1 '\001' opline = (zend_op *) 0x8 original_return_value = (zval **) 0x80a370 current_scope = (zend_class_entry *) 0xf04fe8 current_this = (zval *) 0x0 return_value_used = 0 should_change_scope = 41 ')' #2 0x00007f8774cd8134 in execute (op_array=0xf02040) at /usr/src/php5/source/php5-5.2.13/Zend/zend_vm_execute.h:92 execute_data = Cannot access memory at address 0x8000ffff5410 (gdb) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=52368&edit=1
