Handle failure from PyDict_New or PyList_New

src/_imaging.c

@@ -1249,6 +1249,9 @@ _histogram(ImagingObject *self, PyObject *args) {
 
     /* Build an integer list containing the histogram */
     list = PyList_New(h->bands * 256);
+    if (list == NULL) {
+        return NULL;
+    }
     for (i = 0; i < h->bands * 256; i++) {
         PyObject *item;
         item = PyLong_FromLong(h->histogram[i]);
@@ -2154,6 +2157,9 @@ _getcolors(ImagingObject *self, PyObject *args) {
         Py_INCREF(out);
     } else {
         out = PyList_New(colors);
+        if (out == NULL) {
+            return NULL;
+        }
         for (i = 0; i < colors; i++) {
             ImagingColorItem *v = &items[i];
             PyObject *item = Py_BuildValue(

src/_imagingft.c

@@ -1082,6 +1082,9 @@ font_getvarnames(FontObject *self) {
 
     num_namedstyles = master->num_namedstyles;
     list_names = PyList_New(num_namedstyles);
+    if (list_names == NULL) {
+        return NULL;
+    }
 
     name_count = FT_Get_Sfnt_Name_Count(self->face);
     for (i = 0; i < name_count; i++) {
@@ -1125,10 +1128,16 @@ font_getvaraxes(FontObject *self) {
     name_count = FT_Get_Sfnt_Name_Count(self->face);
 
     list_axes = PyList_New(num_axis);
+    if (list_axes == NULL) {
+        return NULL;
+    }
     for (i = 0; i < num_axis; i++) {
         axis = master->axis[i];
 
         list_axis = PyDict_New();
+        if (list_axis == NULL) {
+            return NULL;
+        }
         PyDict_SetItemString(
             list_axis, "minimum", PyLong_FromLong(axis.minimum / 65536));
         PyDict_SetItemString(list_axis, "default", PyLong_FromLong(axis.def / 65536));

src/_imagingmorph.c

@@ -136,6 +136,9 @@ match(PyObject *self, PyObject *args) {
     int row_idx, col_idx;
     UINT8 **inrows;
     PyObject *ret = PyList_New(0);
+    if (ret == NULL) {
+        return NULL;
+    }
 
     if (!PyArg_ParseTuple(args, "On", &py_lut, &i0)) {
         PyErr_SetString(PyExc_RuntimeError, "Argument parsing problem");
@@ -213,10 +216,12 @@ get_on_pixels(PyObject *self, PyObject *args) {
     int row_idx, col_idx;
     int width, height;
     PyObject *ret = PyList_New(0);
+    if (ret == NULL) {
+        return NULL;
+    }
 
     if (!PyArg_ParseTuple(args, "n", &i0)) {
         PyErr_SetString(PyExc_RuntimeError, "Argument parsing problem");
-
         return NULL;
     }
     img = (Imaging)i0;

src/path.c

@@ -439,6 +439,9 @@ path_tolist(PyPathObject *self, PyObject *args) {
 
     if (flat) {
         list = PyList_New(self->count * 2);
+        if (list == NULL) {
+            return NULL;
+        }
         for (i = 0; i < self->count * 2; i++) {
             PyObject *item;
             item = PyFloat_FromDouble(self->xy[i]);
@@ -449,6 +452,9 @@ path_tolist(PyPathObject *self, PyObject *args) {
         }
     } else {
         list = PyList_New(self->count);
+        if (list == NULL) {
+            return NULL;
+        }
         for (i = 0; i < self->count; i++) {
             PyObject *item;
             item = Py_BuildValue("dd", self->xy[i + i], self->xy[i + i + 1]);