From: Richard M. Stallman <rms@gnu.org>
Date: Sun, 21 Dec 1997 01:59:49 +0000 (+0000)
Subject: (x_display_cursor): Abort if X or Y is out of range.
X-Git-Tag: emacs-20.3~2586
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=045226c75c2c5cb8eac13dd356dfa5d96fde1ce4;p=emacs.git

(x_display_cursor): Abort if X or Y is out of range.
---

diff --git a/src/xterm.c b/src/xterm.c
index b772b4974b0..06a40fcdf7e 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -4902,6 +4902,10 @@ x_display_cursor (f, on, x, y)
 {
   BLOCK_INPUT;
 
+ if ((unsigned) x >= FRAME_WIDTH (f) + FRAME_LEFT_SCROLL_BAR_WIDTH (f)
+      || (unsigned) y >= FRAME_HEIGHT (f))
+    abort ();
+
   if (FRAME_DESIRED_CURSOR (f) == filled_box_cursor)
     x_display_box_cursor (f, on, x, y);
   else if (FRAME_DESIRED_CURSOR (f) == bar_cursor)