Fix persisting of inherited class constants

ext/opcache/zend_persist.c

@@ -806,12 +806,17 @@ static zend_property_info *zend_persist_property_info(zend_property_info *prop)
 
 static void zend_persist_class_constant(zval *zv)
 {
-	zend_class_constant *c = zend_shared_alloc_get_xlat_entry(Z_PTR_P(zv));
+	zend_class_constant *orig_c = Z_PTR_P(zv);
+	zend_class_constant *c = zend_shared_alloc_get_xlat_entry(orig_c);
 	zend_class_entry *ce;
 
 	if (c) {
 		Z_PTR_P(zv) = c;
 		return;
+	} else if (((orig_c->ce->ce_flags & ZEND_ACC_IMMUTABLE) && !(Z_CONSTANT_FLAGS(orig_c->value) & CONST_OWNED))
+	 || orig_c->ce->type == ZEND_INTERNAL_CLASS) {
+		/* Class constant comes from a different file in shm or internal class, keep existing pointer. */
+		return;
 	} else if (!ZCG(current_persistent_script)->corrupted
 	 && zend_accel_in_shm(Z_PTR_P(zv))) {
 		return;

ext/opcache/zend_persist_calc.c

@@ -26,6 +26,7 @@
 #include "zend_shared_alloc.h"
 #include "zend_operators.h"
 #include "zend_attributes.h"
+#include "zend_constants.h"
 
 #define ADD_DUP_SIZE(m,s)  ZCG(current_persistent_script)->size += zend_shared_memdup_size((void*)m, s)
 #define ADD_SIZE(m)        ZCG(current_persistent_script)->size += ZEND_ALIGNED_SIZE(m)
@@ -386,6 +387,11 @@ static void zend_persist_class_constant_calc(zval *zv)
 	zend_class_constant *c = Z_PTR_P(zv);
 
 	if (!zend_shared_alloc_get_xlat_entry(c)) {
+		if (((c->ce->ce_flags & ZEND_ACC_IMMUTABLE) && !(Z_CONSTANT_FLAGS(c->value) & CONST_OWNED))
+		 || c->ce->type == ZEND_INTERNAL_CLASS) {
+			/* Class constant comes from a different file in shm or internal class, keep existing pointer. */
+			return;
+		}
 		if (!ZCG(current_persistent_script)->corrupted
 		 && zend_accel_in_shm(Z_PTR_P(zv))) {
 			return;

ext/zend_test/tests/gh14109.phpt

@@ -0,0 +1,16 @@
+--TEST--
+GH-14109: User class extending internal class with attributes
+--EXTENSIONS--
+zend_test
+--FILE--
+<?php
+class Test extends ZendAttributeTest {}
+foreach ((new ReflectionClassConstant(Test::class, 'TEST_CONST'))->getAttributes() as $attribute) {
+    var_dump($attribute->newInstance());
+}
+?>
+--EXPECTF--
+object(ZendTestRepeatableAttribute)#%d (0) {
+}
+object(ZendTestRepeatableAttribute)#%d (0) {
+}