Bug #62826 [NEW]: mysqli_debug() failing due to mysqlnd trace_alloc being NULL

From: nikic Operating system: PHP version: master-Git-2012-08-15 (Git) Package: MySQLi related Bug Type: Bug Bug description:mysqli_debug() failing due to mysqlnd trace_alloc being NULL Description: ------------ The following tests for mysqli_debug() are failing: mysqli_debug() [ext/mysqli/tests/mysqli_debug.phpt] mysqli_debug() - append to trace file [ext/mysqli/tests/mysqli_debug_append.phpt] mysqli_debug() - all control string options supported by both mysqlnd and libmysql except oOaA [ext/mysqli/tests/mysqli_debug_mysqlnd_control_string.phpt] mysqli_debug() - mysqlnd only control strings [ext/mysqli/tests/mysqli_debug_mysqlnd_only.phpt] The relevant valgrind output is: $ USE_ZEND_ALLOC=0 valgrind sapi/cli/php ext/mysqli/tests/mysqli_debug_mysqlnd_only.php ==9350== Invalid read of size 4 ==9350== at 0x854A171: _mysqlnd_pecalloc (mysqlnd_alloc.c:199) ==9350== by 0x856A0AD: php_mysqlnd_protocol_get_command_packet_pub (mysqlnd_wireprotocol.c:2261) ==9350== by 0x8533C37: php_mysqlnd_conn_data_simple_command_send_request_pub (mysqlnd.c:337) ==9350== by 0x85345FB: php_mysqlnd_conn_data_simple_command_pub (mysqlnd.c:376) ==9350== by 0x853D0B2: php_mysqlnd_conn_data_send_query_pub (mysqlnd.c:1180) ==9350== by 0x853CA98: php_mysqlnd_conn_data_query_pub (mysqlnd.c:1155) ==9350== by 0x8317F17: zif_mysqli_query (mysqli_nonapi.c:598) ==9350== by 0x869697E: zend_do_fcall_common_helper_SPEC (zend_vm_execute.h:643) ==9350== by 0x869E5DE: ZEND_DO_FCALL_SPEC_CONST_HANDLER (zend_vm_execute.h:2298) ==9350== by 0x8694C2B: execute (zend_vm_execute.h:411) ==9350== by 0x86591B6: zend_execute_scripts (zend.c:1286) ==9350== by 0x85BBD37: php_execute_script (main.c:2459) ==9350== Address 0x88 is not stack'd, malloc'd or (recently) free'd ==9350== ==9350== ==9350== Process terminating with default action of signal 11 (SIGSEGV) ==9350== Access not within mapped region at address 0x88 ==9350== at 0x854A171: _mysqlnd_pecalloc (mysqlnd_alloc.c:199) ==9350== by 0x856A0AD: php_mysqlnd_protocol_get_command_packet_pub (mysqlnd_wireprotocol.c:2261) ==9350== by 0x8533C37: php_mysqlnd_conn_data_simple_command_send_request_pub (mysqlnd.c:337) ==9350== by 0x85345FB: php_mysqlnd_conn_data_simple_command_pub (mysqlnd.c:376) ==9350== by 0x853D0B2: php_mysqlnd_conn_data_send_query_pub (mysqlnd.c:1180) ==9350== by 0x853CA98: php_mysqlnd_conn_data_query_pub (mysqlnd.c:1155) ==9350== by 0x8317F17: zif_mysqli_query (mysqli_nonapi.c:598) ==9350== by 0x869697E: zend_do_fcall_common_helper_SPEC (zend_vm_execute.h:643) ==9350== by 0x869E5DE: ZEND_DO_FCALL_SPEC_CONST_HANDLER (zend_vm_execute.h:2298) ==9350== by 0x8694C2B: execute (zend_vm_execute.h:411) ==9350== by 0x86591B6: zend_execute_scripts (zend.c:1286) ==9350== by 0x85BBD37: php_execute_script (main.c:2459) The issue seems to be that the trace_alloc mysqlnd global is NULL, so the dereference segfaults. -- Edit bug report at https://bugs.php.net/bug.php?id=62826&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=62826&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=62826&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=62826&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=62826&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=62826&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=62826&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=62826&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=62826&r=needscript Try newer version: https://bugs.php.net/fix.php?id=62826&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=62826&r=support Expected behavior: https://bugs.php.net/fix.php?id=62826&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=62826&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=62826&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=62826&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=62826&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=62826&r=dst IIS Stability: https://bugs.php.net/fix.php?id=62826&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=62826&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=62826&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=62826&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=62826&r=mysqlcfg