Bug #54583 [Opn]: Segfault when trying to reexecute statement after exception with libmysql

Edit report at http://bugs.php.net/bug.php?id=54583&edit=1 ID: 54583 Updated by: uw@php.net Reported by: an0nym at narod dot ru Summary: Segfault when trying to reexecute statement after exception with libmysql Status: Open Type: Bug Package: PDO related Operating System: CentOS 5.5 x86_64 PHP Version: 5.3.6 -Assigned To: +Assigned To: johannes Block user comment: N Private report: N New Comment: Affects libmysql only. No issue when using mysqlnd. Johannes, please review and apply patch: nixnutz@linux-fuxh:~/php/php-src/branches/PHP_5_3> svn diff ext/pdo_mysql/ Index: ext/pdo_mysql/mysql_statement.c =================================================================== --- ext/pdo_mysql/mysql_statement.c (Revision 310880) +++ ext/pdo_mysql/mysql_statement.c (Arbeitskopie) @@ -136,6 +136,7 @@ { pdo_mysql_stmt *S = stmt->driver_data; pdo_mysql_db_handle *H = S->H; + int paramno; PDO_DBG_ENTER("pdo_mysql_stmt_execute_prepared_libmysql"); @@ -143,6 +144,10 @@ if (mysql_stmt_bind_param(S->stmt, S->params) || mysql_stmt_execute(S->stmt)) { if (S->params) { memset(S->params, 0, S->num_params * sizeof(MYSQL_BIND)); + for (paramno = 0; paramno < S->num_params; paramno++) { + S->params[paramno].is_null = &S->in_null[paramno]; + S->params[paramno].length = &S->in_length[paramno]; + } } pdo_mysql_error_stmt(stmt); if (mysql_stmt_errno(S->stmt) == 2057) { Previous Comments: ------------------------------------------------------------------------ [2011-05-10 12:36:54] an0nym at narod dot ru Sorry, CentOS is with mysqlnd now. Testing on Fedora: root@test # uname -a Linux test 2.6.35.11-83.fc14.x86_64 #1 SMP Mon Feb 7 07:06:44 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux 06:32:59 ~ root@test # php -v PHP 5.3.6 (cli) (built: Mar 17 2011 20:56:13) Copyright (c) 1997-2011 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2011 Zend Technologies 06:33:02 ~ root@test # find / | grep libmysql /usr/lib64/mysql/libmysqlclient.so.16.0.0 /usr/lib64/mysql/libmysqlclient_r.so.16.0.0 /usr/lib64/mysql/libmysqlclient_r.so.16 /usr/lib64/mysql/libmysqlclient.so.16 06:33:06 ~ root@test # cat test.php <?php var_dump(function_exists("mysqli_fetch_all")); $DB = new PDO("mysql:dbname=test;host=localhost", "root", "", array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_EMULATE_PREPARES => false, PDO::MYSQL_ATTR_INIT_COMMAND => "SET SQL_MODE = 'STRICT_ALL_TABLES'")); $DB->exec("CREATE TEMPORARY TABLE t(f VARCHAR(1))"); $stmt = $DB->prepare("INSERT INTO t VALUES(:value)"); $value = "aa"; $stmt->bindParam(":value", $value); try { $stmt->execute(); } catch (PDOException $e) {} $stmt->execute(); 06:33:17 ~ root@test # php test.php bool(false) Segmentation fault 06:33:24 ~ root@test # mysql -uroot Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.1.56 Source distribution Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to modify and redistribute it under the GPL v2 license Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> exit Bye 06:34:43 ~ root@test # ------------------------------------------------------------------------ [2011-05-10 10:15:36] uw@php.net Which version of libmysql is used, what's the server version? ------------------------------------------------------------------------ [2011-04-22 17:23:13] an0nym at narod dot ru Everything works fine with php5.3.5 + mysqlnd @ winsrv2008r2x64. So it seems that the error is with libmysql only. ------------------------------------------------------------------------ [2011-04-21 11:56:55] an0nym at narod dot ru Try new test code, please. I will submit backtrace when I manage to generate it. ------------------------------------------------------------------------ [2011-04-21 11:54:42] an0nym at narod dot ru It seems you don't have strict mode enabled. Try this. <?php $DB = new PDO("mysql:dbname=test;host=localhost", "root", "", array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_EMULATE_PREPARES => false, PDO::MYSQL_ATTR_INIT_COMMAND => "SET SQL_MODE = 'STRICT_ALL_TABLES'")); $DB->exec("CREATE TEMPORARY TABLE t(f VARCHAR(1))"); $stmt = $DB->prepare("INSERT INTO t VALUES(:value)"); $value = "aa"; $stmt->bindParam(":value", $value); try { $stmt->execute(); } catch (PDOException $e) {} $stmt->execute(); ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/bug.php?id=54583 -- Edit this bug report at http://bugs.php.net/bug.php?id=54583&edit=1