Fixed bug #73896 (spl_autoload() crashes when calls magic _call())

xl32 · Jan 9, 2017 · 4f1b24d · 4f1b24d
1 parent 63e08cb
commit 4f1b24d
Show file tree

Hide file tree

Showing 3 changed files with 66 additions and 1 deletion.
diff --git a/NEWS b/NEWS
@@ -22,6 +22,9 @@ PHP                                                                        NEWS
 - Session:
   . Fixed bug #69582 (session not readable by root in CLI). (EvgeniySpinov)
 
+- SPL:
+  . Fixed bug #73896 (spl_autoload() crashes when calls magic _call()). (Dmitry)
+
 - Standard:
   . Fixed bug #69442 (closing of fd incorrect when PTS enabled). (jaytaph)
   . Fixed bug #47021 (SoapClient stumbles over WSDL delivered with

diff --git a/ext/spl/php_spl.c b/ext/spl/php_spl.c
@@ -381,6 +381,11 @@ static void autoload_func_info_dtor(zval *element)
 	if (!Z_ISUNDEF(alfi->closure)) {
 		zval_ptr_dtor(&alfi->closure);
 	}
+	if (alfi->func_ptr &&
+		UNEXPECTED(alfi->func_ptr->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
+		zend_string_release(alfi->func_ptr->common.function_name);
+		zend_free_trampoline(alfi->func_ptr);
+	}
 	efree(alfi);
 }
 
@@ -406,7 +411,15 @@ PHP_FUNCTION(spl_autoload_call)
 		zend_hash_internal_pointer_reset_ex(SPL_G(autoload_functions), &pos);
 		while (zend_hash_get_current_key_ex(SPL_G(autoload_functions), &func_name, &num_idx, &pos) == HASH_KEY_IS_STRING) {
 			alfi = zend_hash_get_current_data_ptr_ex(SPL_G(autoload_functions), &pos);
-			zend_call_method(Z_ISUNDEF(alfi->obj)? NULL : &alfi->obj, alfi->ce, &alfi->func_ptr, ZSTR_VAL(func_name), ZSTR_LEN(func_name), retval, 1, class_name, NULL);
+			if (UNEXPECTED(alfi->func_ptr->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
+				zend_function *copy = emalloc(sizeof(zend_op_array));
+
+				memcpy(copy, alfi->func_ptr, sizeof(zend_op_array));
+				copy->op_array.function_name = zend_string_copy(alfi->func_ptr->op_array.function_name);
+				zend_call_method(Z_ISUNDEF(alfi->obj)? NULL : &alfi->obj, alfi->ce, &copy, ZSTR_VAL(func_name), ZSTR_LEN(func_name), retval, 1, class_name, NULL);
+			} else {
+				zend_call_method(Z_ISUNDEF(alfi->obj)? NULL : &alfi->obj, alfi->ce, &alfi->func_ptr, ZSTR_VAL(func_name), ZSTR_LEN(func_name), retval, 1, class_name, NULL);
+			}
 			zend_exception_save();
 			if (retval) {
 				zval_ptr_dtor(retval);
@@ -568,13 +581,24 @@ PHP_FUNCTION(spl_autoload_register)
 			}
 		}
 
+		if (UNEXPECTED(alfi.func_ptr == &EG(trampoline))) {
+			zend_function *copy = emalloc(sizeof(zend_op_array));
+
+			memcpy(copy, alfi.func_ptr, sizeof(zend_op_array));
+			alfi.func_ptr->common.function_name = NULL;
+			alfi.func_ptr = copy;
+		}
 		if (zend_hash_add_mem(SPL_G(autoload_functions), lc_name, &alfi, sizeof(autoload_func_info)) == NULL) {
 			if (obj_ptr && !(alfi.func_ptr->common.fn_flags & ZEND_ACC_STATIC)) {
 				Z_DELREF(alfi.obj);
 			}
 			if (!Z_ISUNDEF(alfi.closure)) {
 				Z_DELREF(alfi.closure);
 			}
+			if (UNEXPECTED(alfi.func_ptr->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
+				zend_string_release(alfi.func_ptr->common.function_name);
+				zend_free_trampoline(alfi.func_ptr);
+			}
 		}
 		if (prepend && SPL_G(autoload_functions)->nNumOfElements > 1) {
 			/* Move the newly created element to the head of the hashtable */

diff --git a/ext/spl/tests/bug73896.phpt b/ext/spl/tests/bug73896.phpt
@@ -0,0 +1,38 @@
+--TEST--
+Bug #73896 (spl_autoload() crashes when calls magic _call())
+--FILE--
+<?php
+class Registrator {
+    public static function call($callable, array  $args) {
+        return call_user_func_array($callable, [$args]);
+    }
+}
+
+class teLoader {
+    public function __construct() {
+        Registrator::call('spl_autoload_register', [$this, 'autoload']);
+    }
+
+    public function __call($method, $args) {
+        $this->doSomething();
+    }
+
+    protected function autoload($class) {
+    	die("Protected autoload() called!\n");
+    }
+
+    public function doSomething() {
+        throw new teException();
+    }
+}
+
+$teLoader = new teLoader();
+
+try {
+	new teChild();
+} catch (Throwable $e) {
+	echo "Exception: ", $e->getMessage() , "\n";
+}
+?>
+--EXPECT--
+Exception: Class 'teException' not found