Fixed bug #80370: Segmentation fault reflecting attributes of dynamic property

Closes GH-6428.

Author: beberlei

NEWS

@@ -6,6 +6,10 @@ PHP                                                                        NEWS
   . Fixed bug #74558 (Can't rebind closure returned by Closure::fromCallable()).
     (cmb)
 
+- Reflection:
+  . Fixed bug #80370 (getAttributes segfault on dynamic properties). (Benjamin
+    Eberlei)
+
 12 Nov 2020, PHP 8.0.0RC4
 
 - Core:

ext/reflection/php_reflection.c

@@ -5498,6 +5498,10 @@ ZEND_METHOD(ReflectionProperty, getAttributes)
 
 	GET_REFLECTION_OBJECT_PTR(ref);
 
+	if (ref->prop == NULL) {
+		RETURN_EMPTY_ARRAY();
+	}
+
 	reflect_attributes(INTERNAL_FUNCTION_PARAM_PASSTHRU,
 		ref->prop->attributes, 0, ref->prop->ce, ZEND_ATTRIBUTE_TARGET_PROPERTY,
 		ref->prop->ce->type == ZEND_USER_CLASS ? ref->prop->ce->info.user.filename : NULL);

ext/reflection/tests/bug80370.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Bug #80370: Segfault on ReflectionProperty::getAttributes of dynamic property
+--FILE--
+<?php
+class Foobar {
+
+}
+
+$foobar = new Foobar();
+$foobar->bar = 42;
+
+$reflectionObject = new ReflectionObject($foobar);
+$reflectionProperty = $reflectionObject->getProperty('bar');
+var_dump($reflectionProperty->getAttributes());
+--EXPECT--
+array(0) {
+}