From 6da490099b9ef853488ea308978fed149212f33b Mon Sep 17 00:00:00 2001
From: Aidan MacDonald <amachronic@protonmail.com>
Date: Tue, 22 Jun 2021 21:39:45 +0100
Subject: [PATCH] Touchscreen: absolute point mode scrolling bugfix

Due to this inadequate bounds check, it was possible under certain
conditions to cause a crash by touching & scrolling in the empty
space "after" the last item of a list.

Change-Id: Ic6c30214d887e1c7ccb212de272248ca24f60856
---
 apps/gui/bitmap/list.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/gui/bitmap/list.c b/apps/gui/bitmap/list.c
index 6f6a8c1f7f..a82595fb37 100644
--- a/apps/gui/bitmap/list.c
+++ b/apps/gui/bitmap/list.c
@@ -734,7 +734,7 @@ unsigned gui_synclist_do_touchscreen(struct gui_synclist * list)
                     if (list_display_title(list, screen))
                         line -= 1; /* adjust for the list title */
                 }
-                if (line >= list->nb_items)
+                if (list_start_item+line >= list->nb_items)
                     return ACTION_NONE;
                 list->selected_item = list_start_item+line;