bindings: python: fix a memory corruption

PyList_GetItem() returns a borrowed reference so we need to increase
the reference count on the returned object before DECREF'ing the list
object itself

This fixes random 'free(): invalid pointer' errors.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>

diff --git a/bindings/python/gpiodmodule.c b/bindings/python/gpiodmodule.c
index 3c4c254911bddf37a3091236aaa4351c21892002..d4af5a72d0fce22f32b9c1c19745f5e3cc844d4b 100644 (file)
--- a/bindings/python/gpiodmodule.c
+++ b/bindings/python/gpiodmodule.c
@@ -399,6 +399,7 @@ static PyObject *gpiod_Line_get_value(gpiod_LineObject *self)
                return NULL;
 
        ret = PyList_GetItem(vals, 0);
+       Py_INCREF(ret);
        Py_DECREF(vals);
 
        return ret;