Commit 87f8d174266 for php.net

commit 87f8d1742664c677fa12bd7e146fafe431885cdf
Author: Ilia Alshanetsky <ilia@ilia.ws>
Date:   Fri Jul 31 07:47:39 2026 -0400

    Free previous state when re-calling Reflection*::__construct()

    ReflectionMethod::__construct() overwrote intern->ptr without releasing
    the previous Closure::__invoke() trampoline, and
    ReflectionClassConstant::__construct() overwrote the $name and $class
    slots without dropping their previous references. ReflectionFunction,
    ReflectionParameter and ReflectionProperty already release prior state
    on re-entry.

    Closes GH-22968

diff --git a/ext/reflection/php_reflection.c b/ext/reflection/php_reflection.c
index 0945c9574c6..65462bb8652 100644
--- a/ext/reflection/php_reflection.c
+++ b/ext/reflection/php_reflection.c
@@ -3420,6 +3420,13 @@ static void instantiate_reflection_method(INTERNAL_FUNCTION_PARAMETERS, bool is_
 	}
 	efree(lcname);

+	if (intern->ptr) {
+		ZEND_ASSERT(is_constructor);
+		_free_function(intern->ptr);
+		zval_ptr_dtor(reflection_prop_name(object));
+		zval_ptr_dtor(reflection_prop_class(object));
+	}
+
 	ZVAL_STR_COPY(reflection_prop_name(object), mptr->common.function_name);
 	ZVAL_STR_COPY(reflection_prop_class(object), mptr->common.scope->name);
 	intern->ptr = mptr;
@@ -3932,6 +3939,11 @@ ZEND_METHOD(ReflectionClassConstant, __construct)
 		RETURN_THROWS();
 	}

+	if (intern->ptr) {
+		zval_ptr_dtor(reflection_prop_name(object));
+		zval_ptr_dtor(reflection_prop_class(object));
+	}
+
 	intern->ptr = constant;
 	intern->ref_type = REF_TYPE_CLASS_CONSTANT;
 	intern->ce = constant->ce;
diff --git a/ext/reflection/tests/ReflectionClassConstant_double_construct.phpt b/ext/reflection/tests/ReflectionClassConstant_double_construct.phpt
new file mode 100644
index 00000000000..efd5472c4af
--- /dev/null
+++ b/ext/reflection/tests/ReflectionClassConstant_double_construct.phpt
@@ -0,0 +1,33 @@
+--TEST--
+ReflectionClassConstant double construct call does not leak $name and $class
+--FILE--
+<?php
+
+class C {
+    const FOO = 1;
+}
+
+function test(ReflectionClassConstant $r) {
+    /* implode() so that the name is not an interned string. */
+    $r->__construct(C::class, implode('', ['F', 'O', 'O']));
+}
+
+$r = new ReflectionClassConstant(C::class, 'FOO');
+for ($i = 0; $i < 10; $i++) {
+    test($r);
+}
+
+$before = memory_get_usage();
+for ($i = 0; $i < 1000; $i++) {
+    test($r);
+}
+$after = memory_get_usage();
+
+var_dump($before === $after);
+var_dump($r->name, $r->class);
+
+?>
+--EXPECT--
+bool(true)
+string(3) "FOO"
+string(1) "C"
diff --git a/ext/reflection/tests/ReflectionMethod_double_construct_closure.phpt b/ext/reflection/tests/ReflectionMethod_double_construct_closure.phpt
new file mode 100644
index 00000000000..3642974d9a6
--- /dev/null
+++ b/ext/reflection/tests/ReflectionMethod_double_construct_closure.phpt
@@ -0,0 +1,28 @@
+--TEST--
+ReflectionMethod double construct call on Closure::__invoke() does not leak
+--FILE--
+<?php
+
+function test(ReflectionMethod $r) {
+    $r->__construct(function () {}, '__invoke');
+}
+
+$r = new ReflectionMethod(function () {}, '__invoke');
+for ($i = 0; $i < 10; $i++) {
+    test($r);
+}
+
+$before = memory_get_usage();
+for ($i = 0; $i < 1000; $i++) {
+    test($r);
+}
+$after = memory_get_usage();
+
+var_dump($before === $after);
+var_dump($r->name, $r->class);
+
+?>
+--EXPECT--
+bool(true)
+string(8) "__invoke"
+string(7) "Closure"