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ext/pdo_firebird: (master) Fixed GH-18276 - persistent connection - "zend_mm_heap corrupted" with setAttribute() #18292

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ext/pdo_firebird: (master) Fixed GH-18276 - persistent connection - "zend_mm_heap corrupted" with setAttribute() #18292

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fd16327
Added a test
SakiTakamachi Apr 10, 2025
69fce03
Modified to use zend_string_dup to copy string
SakiTakamachi Apr 10, 2025
27d41f8
fixed get_attribute
SakiTakamachi Apr 10, 2025
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54 changes: 39 additions & 15 deletions ext/pdo_firebird/firebird_driver.c
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Original file line number Diff line number Diff line change
Expand Up @@ -599,13 +599,13 @@ static void firebird_handle_closer(pdo_dbh_t *dbh) /* {{{ */
}

if (H->date_format) {
zend_string_release_ex(H->date_format, false);
zend_string_release(H->date_format);
}
if (H->time_format) {
zend_string_release_ex(H->time_format, false);
zend_string_release(H->time_format);
}
if (H->timestamp_format) {
zend_string_release_ex(H->timestamp_format, false);
zend_string_release(H->timestamp_format);
}

if (H->einfo.errmsg) {
Expand Down Expand Up @@ -1086,38 +1086,47 @@ static bool pdo_firebird_set_attribute(pdo_dbh_t *dbh, zend_long attr, zval *val

case PDO_FB_ATTR_DATE_FORMAT:
{
zend_string *str = zval_try_get_string(val);
if (UNEXPECTED(!str)) {
zend_string *strval = zval_try_get_string(val);
if (UNEXPECTED(!strval)) {
return false;
}
zend_string *str = zend_string_dup(strval, dbh->is_persistent);
zend_string_release_ex(strval, false);

if (H->date_format) {
zend_string_release_ex(H->date_format, false);
zend_string_release(H->date_format);
}
H->date_format = str;
}
return true;

case PDO_FB_ATTR_TIME_FORMAT:
{
zend_string *str = zval_try_get_string(val);
if (UNEXPECTED(!str)) {
zend_string *strval = zval_try_get_string(val);
if (UNEXPECTED(!strval)) {
return false;
}
zend_string *str = zend_string_dup(strval, dbh->is_persistent);
zend_string_release_ex(strval, false);

if (H->time_format) {
zend_string_release_ex(H->time_format, false);
zend_string_release(H->time_format);
}
H->time_format = str;
}
return true;

case PDO_FB_ATTR_TIMESTAMP_FORMAT:
{
zend_string *str = zval_try_get_string(val);
if (UNEXPECTED(!str)) {
zend_string *strval = zval_try_get_string(val);
if (UNEXPECTED(!strval)) {
return false;
}
zend_string *str = zend_string_dup(strval, dbh->is_persistent);
zend_string_release_ex(strval, false);

if (H->timestamp_format) {
zend_string_release_ex(H->timestamp_format, false);
zend_string_release(H->timestamp_format);
}
H->timestamp_format = str;
}
Expand Down Expand Up @@ -1241,23 +1250,38 @@ static int pdo_firebird_get_attribute(pdo_dbh_t *dbh, zend_long attr, zval *val)

case PDO_FB_ATTR_DATE_FORMAT:
if (H->date_format) {
ZVAL_STR_COPY(val, H->date_format);
if (dbh->is_persistent) {
zend_string *str = zend_string_dup(H->date_format, false);
ZVAL_STR(val, str);
} else {
ZVAL_STR_COPY(val, H->date_format);
}
} else {
ZVAL_STRING(val, PDO_FB_DEF_DATE_FMT);
}
return 1;

case PDO_FB_ATTR_TIME_FORMAT:
if (H->time_format) {
ZVAL_STR_COPY(val, H->time_format);
if (dbh->is_persistent) {
zend_string *str = zend_string_dup(H->time_format, false);
ZVAL_STR(val, str);
} else {
ZVAL_STR_COPY(val, H->time_format);
}
} else {
ZVAL_STRING(val, PDO_FB_DEF_TIME_FMT);
}
return 1;

case PDO_FB_ATTR_TIMESTAMP_FORMAT:
if (H->timestamp_format) {
ZVAL_STR_COPY(val, H->timestamp_format);
if (dbh->is_persistent) {
zend_string *str = zend_string_dup(H->timestamp_format, false);
ZVAL_STR(val, str);
} else {
ZVAL_STR_COPY(val, H->timestamp_format);
}
} else {
ZVAL_STRING(val, PDO_FB_DEF_TIMESTAMP_FMT);
}
Expand Down
35 changes: 35 additions & 0 deletions ext/pdo_firebird/tests/gh18276.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
--TEST--
GH-18276 (persistent connection - setAttribute(Pdo\Firebird::ATTR_DATE_FORMAT, ..) results in "zend_mm_heap corrupted")
--EXTENSIONS--
pdo_firebird
--SKIPIF--
<?php require('skipif.inc'); ?>
--XLEAK--
A bug in firebird causes a memory leak when calling `isc_attach_database()`.
See https://github.com/FirebirdSQL/firebird/issues/7849
--FILE--
<?php

require("testdb.inc");
unset($dbh);

for ($i = 0; $i < 2; $i++) {
$dbh = new PDO(
PDO_FIREBIRD_TEST_DSN,
PDO_FIREBIRD_TEST_USER,
PDO_FIREBIRD_TEST_PASS,
[
PDO::ATTR_PERSISTENT => true,
],
);
// Avoid interned
$dbh->setAttribute(PDO::FB_ATTR_DATE_FORMAT, str_repeat('Y----m----d', random_int(1, 1)));
$dbh->setAttribute(PDO::FB_ATTR_TIME_FORMAT, str_repeat('H::::i::::s', random_int(1, 1)));
$dbh->setAttribute(PDO::FB_ATTR_TIMESTAMP_FORMAT, str_repeat('Y----m----d....H::::i::::s', random_int(1, 1)));
unset($dbh);
}

echo 'done!';
?>
--EXPECT--
done!
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