ctypes: fix CThunkObject_new()
* Initialize restype and flags fields to fix a crash when Python runs on a
read-only file system
* Use Py_ssize_t type rather than int for the "i" iterator variable
* Reorder assignements to be able to more easily check if all fields are
initialized
Issue #11048. Initial patch written by Marcin Bachry.
diff --git a/Modules/_ctypes/callbacks.c b/Modules/_ctypes/callbacks.c
index 7cd6164..91413d7 100644
--- a/Modules/_ctypes/callbacks.c
+++ b/Modules/_ctypes/callbacks.c
@@ -305,7 +305,7 @@
static CThunkObject* CThunkObject_new(Py_ssize_t nArgs)
{
CThunkObject *p;
- int i;
+ Py_ssize_t i;
p = PyObject_GC_NewVar(CThunkObject, &PyCThunk_Type, nArgs);
if (p == NULL) {
@@ -313,11 +313,13 @@
return NULL;
}
- p->pcl_exec = NULL;
p->pcl_write = NULL;
+ p->pcl_exec = NULL;
memset(&p->cif, 0, sizeof(p->cif));
+ p->flags = 0;
p->converters = NULL;
p->callable = NULL;
+ p->restype = NULL;
p->setfunc = NULL;
p->ffi_restype = NULL;