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https://bugs.gentoo.org/768285
https://midnight-commander.org/ticket/4192
From 6394547dbffbad44ea50c64c282de4b610ca07bf Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyfox@gentoo.org>
Date: Wed, 3 Feb 2021 09:47:13 +0300
Subject: [PATCH] Ticket #4192: fix crash if shadow is out of screen.
(tty_clip): add extra tests for area boundaries.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
---
lib/tty/tty-ncurses.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/lib/tty/tty-ncurses.c b/lib/tty/tty-ncurses.c
index 03235cd5b..5cddf5059 100644
--- a/lib/tty/tty-ncurses.c
+++ b/lib/tty/tty-ncurses.c
@@ -152,9 +152,16 @@ tty_clip (int *y, int *x, int *rows, int *cols)
if (*y + *rows > LINES)
*rows = LINES - *y;
+
+ if (*rows <= 0)
+ return FALSE;
+
if (*x + *cols > COLS)
*cols = COLS - *x;
+ if (*cols <= 0)
+ return FALSE;
+
return TRUE;
}
--
2.30.0
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