validate bounds of pixel index in make_transparent

Author: FoamyGuy

locale/circuitpython.pot

@@ -72,7 +72,7 @@ msgstr ""
 #: ports/mimxrt10xx/common-hal/rtc/RTC.c
 #: ports/nrf/common-hal/analogio/AnalogOut.c ports/nrf/common-hal/rtc/RTC.c
 #: ports/raspberrypi/common-hal/analogio/AnalogOut.c
-#: ports/raspberrypi/common-hal/rtc/RTC.c
+#: ports/raspberrypi/common-hal/rtc/RTC.c ports/stm/common-hal/rtc/RTC.c
 msgid "%q"
 msgstr ""
 
@@ -432,7 +432,6 @@ msgstr ""
 msgid "All event channels in use"
 msgstr ""
 
-#: ports/raspberrypi/common-hal/pulseio/PulseIn.c
 #: ports/raspberrypi/common-hal/rp2pio/StateMachine.c
 msgid "All state machines in use"
 msgstr ""
@@ -518,7 +517,7 @@ msgstr ""
 msgid "AuthMode.OPEN is not used with password"
 msgstr ""
 
-#: shared-bindings/wifi/Radio.c
+#: shared-bindings/wifi/Radio.c supervisor/shared/web_workflow/web_workflow.c
 msgid "Authentication failure"
 msgstr ""
 
@@ -3687,6 +3686,10 @@ msgstr ""
 msgid "palette must be 32 bytes long"
 msgstr ""
 
+#: shared-bindings/displayio/Palette.c
+msgid "palette_index out of bounds"
+msgstr ""
+
 #: shared-bindings/displayio/Palette.c
 msgid "palette_index should be an int"
 msgstr ""
@@ -3915,10 +3918,6 @@ msgstr ""
 msgid "source_bitmap must have value_count of 8"
 msgstr ""
 
-#: shared-bindings/wifi/Radio.c
-msgid "ssid can't be more than 32 bytes"
-msgstr ""
-
 #: py/objstr.c
 msgid "start/end indices"
 msgstr ""

shared-bindings/displayio/Palette.c

@@ -160,6 +160,10 @@ STATIC mp_obj_t displayio_palette_obj_make_transparent(mp_obj_t self_in, mp_obj_
     if (!mp_obj_get_int_maybe(palette_index_obj, &palette_index)) {
         mp_raise_ValueError(translate("palette_index should be an int"));
     }
+    if (palette_index < 0 || (unsigned)palette_index >= common_hal_displayio_palette_get_len(self)) {
+        mp_raise_IndexError(translate("palette_index out of bounds"));
+    }
+
     common_hal_displayio_palette_make_transparent(self, palette_index);
     return mp_const_none;
 }