Fix use-of-uninitialized-value in start_fake_frame

iluuu1994 · iluuu1994 · commit ed27d70d9a42 · 2023-08-03T09:49:51.000+02:00
Closes GH-11732
diff --git a/Zend/zend_execute_API.c b/Zend/zend_execute_API.c
@@ -897,6 +897,8 @@ zend_result zend_call_function(zend_fcall_info *fci, zend_fcall_info_cache *fci_
 	}
 
 	if (UNEXPECTED(ZEND_CALL_INFO(call) & ZEND_CALL_MAY_HAVE_UNDEF)) {
+		/* zend_handle_undef_args assumes prev_execute_data is initialized. */
+		call->prev_execute_data = NULL;
 		if (zend_handle_undef_args(call) == FAILURE) {
 			zend_vm_stack_free_args(call);
 			zend_vm_stack_free_call_frame(call);

Original file line number	Diff line number	Diff line change
`@@ -897,6 +897,8 @@ zend_result zend_call_function(zend_fcall_info fci, zend_fcall_info_cache fci_`
`897`	`897`	`}`
`898`	`898`
`899`	`899`	`if (UNEXPECTED(ZEND_CALL_INFO(call) & ZEND_CALL_MAY_HAVE_UNDEF)) {`
	`900`	`+ /* zend_handle_undef_args assumes prev_execute_data is initialized. */`
	`901`	`+ call->prev_execute_data = NULL;`
`900`	`902`	`if (zend_handle_undef_args(call) == FAILURE) {`
`901`	`903`	`zend_vm_stack_free_args(call);`
`902`	`904`	`zend_vm_stack_free_call_frame(call);`