Skip to content

ext/oci8: Fix GH-18873 - Free column->descid appropriately #18957

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 4 commits into from
Closed

ext/oci8: Fix GH-18873 - Free column->descid appropriately #18957

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
62b76bf
Decrease the reference count before calling `zend_list_close()`
SakiTakamachi Jun 27, 2025
eeaac90
Address comments
SakiTakamachi Jun 30, 2025
6c139b7
Skip the test when Zend MM is disabled.
SakiTakamachi Jul 1, 2025
95b124b
fixed the skip condition
SakiTakamachi Jul 2, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 2 additions & 6 deletions ext/oci8/oci8.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -573,12 +573,8 @@ void php_oci_column_hash_dtor(zval *data)
zend_list_close(column->stmtid);
}

if (column->descid) {
if (GC_REFCOUNT(column->descid) == 1)
zend_list_close(column->descid);
else {
GC_DELREF(column->descid);
}
if (column->descid && !GC_DELREF(column->descid)) {
zend_list_free(column->descid);
}

if (column->data) {
Expand Down
37 changes: 37 additions & 0 deletions ext/oci8/tests/gh18873.phpt
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,37 @@
--TEST--
GH-18873 (OCI_RETURN_LOBS flag causes oci8 to leak memory)
--EXTENSIONS--
oci8
--SKIPIF--
<?php
require_once 'skipifconnectfailure.inc';
?>
--FILE--
<?php
require __DIR__.'/connect.inc';

$expectedStr = str_repeat('a', 1_001);
$sql = 'select concat(TO_CLOB(\'' . str_repeat('a', 1_000) . '\'), TO_CLOB(\'a\')) AS "v" from "DUAL"';

$memUsages = array_flip(range(0, 100 - 1));
foreach (array_keys($memUsages) as $k) {
$stid = oci_parse($c, $sql);
oci_execute($stid);
$row = oci_fetch_array($stid, \OCI_ASSOC | \OCI_RETURN_LOBS);
$res = $row['v'];

$memUsages[$k] = memory_get_usage();
}

$memUsages = array_slice($memUsages, 1, null, true);
$memUsages = array_unique($memUsages);

if (count($memUsages) !== 1) {
var_dump($memUsages);
throw new \Exception('memory leak detected');
}

echo "Done!\n";
?>
--EXPECT--
Done!
Loading