Merge branch 'PHP-8.2' into PHP-8.3

* PHP-8.2:
  Add missing NULL checks for spl autoload table
  Add missing NULL pointer checks related to the previous call frame

Author: ndossche

NEWS

@@ -5,6 +5,7 @@ PHP                                                                        NEWS
 - Core:
   . Fixed bug GH-12758 / GH-12768 (Invalid opline in OOM handlers within
     ZEND_FUNC_GET_ARGS and ZEND_BIND_STATIC). (Florian Engelhardt)
+  . Fix various missing NULL checks. (nielsdos, dstogov)
 
 - LibXML:
   . Fixed test failures for libxml2 2.12.0. (nielsdos)

Zend/zend_builtin_functions.c

@@ -164,7 +164,7 @@ ZEND_FUNCTION(func_num_args)
 
 	ZEND_PARSE_PARAMETERS_NONE();
 
-	if (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE) {
+	if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE)) {
 		zend_throw_error(NULL, "func_num_args() must be called from a function context");
 		RETURN_THROWS();
 	}
@@ -195,7 +195,7 @@ ZEND_FUNCTION(func_get_arg)
 	}
 
 	ex = EX(prev_execute_data);
-	if (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE) {
+	if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE)) {
 		zend_throw_error(NULL, "func_get_arg() cannot be called from the global scope");
 		RETURN_THROWS();
 	}
@@ -233,7 +233,7 @@ ZEND_FUNCTION(func_get_args)
 
 	ZEND_PARSE_PARAMETERS_NONE();
 
-	if (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE) {
+	if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE)) {
 		zend_throw_error(NULL, "func_get_args() cannot be called from the global scope");
 		RETURN_THROWS();
 	}

ext/spl/php_spl.c

@@ -588,8 +588,10 @@ PHP_FUNCTION(spl_autoload_unregister)
 
 	if (fcc.function_handler && zend_string_equals_literal(
 			fcc.function_handler->common.function_name, "spl_autoload_call")) {
-		/* Don't destroy the hash table, as we might be iterating over it right now. */
-		zend_hash_clean(spl_autoload_functions);
+		if (spl_autoload_functions) {
+			/* Don't destroy the hash table, as we might be iterating over it right now. */
+			zend_hash_clean(spl_autoload_functions);
+		}
 		RETURN_TRUE;
 	}
 

ext/spl/tests/spl_autoload_unregister_without_registrations.phpt

@@ -0,0 +1,10 @@
+--TEST--
+spl_autoload_unregister("spl_autoload_call") without registrations
+--FILE--
+<?php
+var_dump(spl_autoload_unregister("spl_autoload_call"));
+?>
+Done
+--EXPECT--
+bool(true)
+Done

ext/standard/basic_functions.c

@@ -1533,7 +1533,7 @@ PHP_FUNCTION(forward_static_call)
 		Z_PARAM_VARIADIC('*', fci.params, fci.param_count)
 	ZEND_PARSE_PARAMETERS_END();
 
-	if (!EX(prev_execute_data)->func->common.scope) {
+	if (!EX(prev_execute_data) || !EX(prev_execute_data)->func->common.scope) {
 		zend_throw_error(NULL, "Cannot call forward_static_call() when no class scope is active");
 		RETURN_THROWS();
 	}

ext/standard/tests/general_functions/register_shutdown_functions_without_previous_call_frame_01.phpt

@@ -0,0 +1,15 @@
+--TEST--
+register_shutdown_function() without a previous call frame 01
+--FILE--
+<?php
+register_shutdown_function("forward_static_call", "hash_hkdf");
+?>
+Done
+--EXPECT--
+Done
+
+Fatal error: Uncaught Error: Cannot call forward_static_call() when no class scope is active in [no active file]:0
+Stack trace:
+#0 [internal function]: forward_static_call('hash_hkdf')
+#1 {main}
+  thrown in [no active file] on line 0

ext/standard/tests/general_functions/register_shutdown_functions_without_previous_call_frame_02.phpt

@@ -0,0 +1,15 @@
+--TEST--
+register_shutdown_function() without a previous call frame 02
+--FILE--
+<?php
+register_shutdown_function("func_get_args");
+?>
+Done
+--EXPECT--
+Done
+
+Fatal error: Uncaught Error: Cannot call func_get_args() dynamically in [no active file]:0
+Stack trace:
+#0 [internal function]: func_get_args()
+#1 {main}
+  thrown in [no active file] on line 0

ext/standard/tests/general_functions/register_shutdown_functions_without_previous_call_frame_03.phpt

@@ -0,0 +1,15 @@
+--TEST--
+register_shutdown_function() without a previous call frame 03
+--FILE--
+<?php
+register_shutdown_function("func_num_args");
+?>
+Done
+--EXPECT--
+Done
+
+Fatal error: Uncaught Error: Cannot call func_num_args() dynamically in [no active file]:0
+Stack trace:
+#0 [internal function]: func_num_args()
+#1 {main}
+  thrown in [no active file] on line 0

ext/standard/tests/general_functions/register_shutdown_functions_without_previous_call_frame_04.phpt

@@ -0,0 +1,15 @@
+--TEST--
+register_shutdown_function() without a previous call frame 04
+--FILE--
+<?php
+register_shutdown_function("func_get_arg");
+?>
+Done
+--EXPECT--
+Done
+
+Fatal error: Uncaught ArgumentCountError: func_get_arg() expects exactly 1 argument, 0 given in [no active file]:0
+Stack trace:
+#0 [internal function]: func_get_arg()
+#1 {main}
+  thrown in [no active file] on line 0