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[2004-05-31 12:10 UTC] derick@php.net
[2004-06-01 03:08 UTC] abies@php.net
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Last updated: Sat Mar 29 04:01:32 2025 UTC |
Description: ------------ Identification strings used for connections, statements and descriptors are not thread safe. There is a possible mix-up of identifications under multithread webservers. There is a possible memory allocation during module shutdown in function ifx_do_close which can lead crash. Here is a patch for ifx.ec --- php-4.3.7RC1.orig/ext/informix/ifx.ec 2003-11-03 00:14:06.000000000 +0100 +++ php-4.3.7RC1/ext/informix/ifx.ec 2004-05-29 18:14:16.000000000 +0200 @@ -297,30 +297,13 @@ if (ifx_check() == 0) { /* DISCONNECT again, after rollback */ EXEC SQL DISCONNECT :link; - if (ifx_check() < 0) { - IFXG(sv_sqlcode) = SQLCODE; - php_error_docref(NULL TSRMLS_CC, E_WARNING, "Disconnect link %s after Automatic Rollback fails (%s)", link, ifx_error(link)); - } } - if (ifx_check() < 0) { + else if (ifx_check() < 0) { /* CLOSE database if rollback or disconnect fails */ EXEC SQL CLOSE DATABASE; - if (ifx_check() < 0) { - IFXG(sv_sqlcode) = SQLCODE; - php_error_docref(NULL TSRMLS_CC, E_WARNING, "Close database fails %s (%s)", link, ifx_error(link)); - } - } - } - else if (SQLCODE < 0) { - IFXG(sv_sqlcode) = SQLCODE; - php_error_docref(NULL TSRMLS_CC, E_WARNING, "Disconnect link %s fails (%s)", link, ifx_error(link)); } } - else { - IFXG(sv_sqlcode) = SQLCODE; - php_error_docref(NULL TSRMLS_CC, E_WARNING, "Set connection %s fails (%s)", link, ifx_error(link)); } - } static void _close_ifx_link(zend_rsrc_list_entry *rsrc TSRMLS_DC) @@ -532,7 +515,11 @@ /* create the link */ ifx = (char *) malloc(sizeof(IFX)); IFXG(connectionid)++; +#ifdef ZTS + sprintf(ifx, "%s%x_%x", SAFE_STRING(user), tsrm_thread_id(), IFXG(connectionid)); +#else sprintf(ifx, "%s%x", SAFE_STRING(user), IFXG(connectionid)); +#endif EXEC SQL CONNECT TO :host AS :ifx USER :user USING :passwd WITH CONCURRENT TRANSACTION; @@ -629,7 +616,11 @@ ifx = (char *) emalloc(sizeof(IFX)); IFXG(connectionid)++; +#ifdef ZTS + sprintf(ifx, "connec%x_%x", tsrm_thread_id(), IFXG(connectionid)); +#else sprintf(ifx, "connec%x", IFXG(connectionid)); +#endif EXEC SQL CONNECT TO :host AS :ifx USER :user USING :passwd WITH CONCURRENT TRANSACTION; @@ -800,10 +791,17 @@ statement = Z_STRVAL_PP(query); IFXG(cursorid)++; +#ifdef ZTS + sprintf(statemid, "statem%x_%x", tsrm_thread_id(), IFXG(cursorid)); + sprintf(cursorid, "cursor%x_%x", tsrm_thread_id(), IFXG(cursorid)); + sprintf(descrpid, "descrp%x_%x", tsrm_thread_id(), IFXG(cursorid)); + sprintf(i_descrpid, "i_descrp%x_%x", tsrm_thread_id(), IFXG(cursorid)); +#else sprintf(statemid, "statem%x", IFXG(cursorid)); sprintf(cursorid, "cursor%x", IFXG(cursorid)); sprintf(descrpid, "descrp%x", IFXG(cursorid)); sprintf(i_descrpid, "i_descrp%x", IFXG(cursorid)); +#endif EXEC SQL set connection :ifx; PHP_IFX_CHECK_CONNECTION(ifx); @@ -1206,10 +1204,17 @@ statement = Z_STRVAL_PP(query); IFXG(cursorid)++; +#ifdef ZTS + sprintf(statemid, "statem%x_%x", tsrm_thread_id(), IFXG(cursorid)); + sprintf(cursorid, "cursor%x_%x", tsrm_thread_id(), IFXG(cursorid)); + sprintf(descrpid, "descrp%x_%x", tsrm_thread_id(), IFXG(cursorid)); + sprintf(i_descrpid, "i_descrp%x_%x", tsrm_thread_id(), IFXG(cursorid)); +#else sprintf(statemid, "statem%x", IFXG(cursorid)); sprintf(cursorid, "cursor%x", IFXG(cursorid)); sprintf(descrpid, "descrp%x", IFXG(cursorid)); sprintf(i_descrpid, "i_descrp%x", IFXG(cursorid)); +#endif EXEC SQL set connection :ifx; PHP_IFX_CHECK_CONNECTION(ifx); Moreover there is a memory leak in all php_error_docref calls where ifx_error(ifx) is used. There are 64 bytes allocated which are never free.