ID: 48070
Comment by: jarismar dot php at gmail dot com
Reported By: jarismar dot php at gmail dot com
Status: Open
Bug Type: PDO related
Operating System: irrelevant
PHP Version: 5.2CVS-2009-04-24 (CVS)
New Comment:
I think, this happens because error messages are being created with
pestrdup and later destructed with efree.
I've changed the pdo_oci extension to use pefree when appropriate, it
seems to solve the problem.
This is the patch against PHP_5_2 tip.
cvs diff - u >
Index: oci_driver.c
===================================================================
RCS file: /repository/php-src/ext/pdo_oci/oci_driver.c,v
retrieving revision 1.24.2.4.2.11
diff -u -u -p -r1.24.2.4.2.11 oci_driver.c
--- oci_driver.c 31 Dec 2008 11:17:42 -0000 1.24.2.4.2.11
+++ oci_driver.c 24 Apr 2009 10:47:29 -0000
@@ -70,16 +70,15 @@ ub4 _oci_error(OCIError *err, pdo_dbh_t
S = (pdo_oci_stmt*)stmt->driver_data;
einfo = &S->einfo;
pdo_err = &stmt->error_code;
- if (einfo->errmsg) {
- efree(einfo->errmsg);
- }
}
else {
einfo = &H->einfo;
- if (einfo->errmsg) {
- pefree(einfo->errmsg, dbh->is_persistent);
- }
}
+
+ if (einfo->errmsg) {
+ pefree(einfo->errmsg, dbh->is_persistent);
+ }
+
einfo->errmsg = NULL;
einfo->errcode = 0;
Index: oci_statement.c
===================================================================
RCS file: /repository/php-src/ext/pdo_oci/oci_statement.c,v
retrieving revision 1.16.2.10.2.9
diff -u -u -p -r1.16.2.10.2.9 oci_statement.c
--- oci_statement.c 31 Dec 2008 11:17:42 -0000 1.16.2.10.2.9
+++ oci_statement.c 24 Apr 2009 10:47:30 -0000
@@ -54,6 +54,7 @@ static php_stream *oci_create_lob_stream
static int oci_stmt_dtor(pdo_stmt_t *stmt TSRMLS_DC) /* {{{ */
{
pdo_oci_stmt *S = (pdo_oci_stmt*)stmt->driver_data;
+ pdo_dbh_t *dbh = stmt->dbh;
HashTable *BC = stmt->bound_columns;
HashTable *BP = stmt->bound_params;
@@ -87,7 +88,7 @@ static int oci_stmt_dtor(pdo_stmt_t *stm
}
if (S->einfo.errmsg) {
- efree(S->einfo.errmsg);
+ pefree(S->einfo.errmsg, dbh->is_persistent);
S->einfo.errmsg = NULL;
}
Previous Comments:
------------------------------------------------------------------------
[2009-04-24 14:09:13] jarismar dot php at gmail dot com
Description:
------------
When using persistent connections apache segfaults at end of the
request.
The segfault only happens if some statment has got error.
Reproduced on Windows (XP) and Linux (debian 2.6.29-1-686).
Reproduce code:
---------------
$sDSN = 'oci:dbname=//webreport:1521/adplabs';
$sUserName = 'rpttest82';
$sPassword = 'rpttest82';
$oPDO = new PDO($sDSN, $sUserName, $sPassword,
array(PDO::ATTR_PERSISTENT => true));
$oPDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
try {
$oStatement = $oPDO->prepare('Select x from no_table');
$oStatement->execute();
} catch (Exception $oException) {
print $oException->getMessage()."\n";
}
Expected result:
----------------
SQLSTATE[HY000]: General error: 942 OCIStmtExecute: ORA-00942: table or
view does not exist
(/home/jaris/php-latest/ext/pdo_oci/oci_statement.c:147)
Actual result:
--------------
Windows :
Unhandled exception at 0x0088ad16 (php5ts.dll) in Apache.exe:
0xC0000005: Access violation reading location 0x002c5cc4.
Debian :
segmentation fault
ALERT - canary mismatch on efree() - heap overflow detected (attacker
'REMOTE_ADDR not set', file 'unknown')
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=48070&edit=1
