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wtouchln - verify/clip input parameters 

From Naman Jain in PR lib/55454
This commit is contained in:
uwe 2020-07-03 23:28:51 +00:00
parent f4f4a9077d
commit 71a0f0ceb5
1 changed files with 9 additions and 4 deletions
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13
lib/libcurses/touchwin.c
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@ -1,4 +1,4 @@
/* $NetBSD: touchwin.c,v 1.31 2019/04/24 07:09:44 blymn Exp $ */
/* $NetBSD: touchwin.c,v 1.32 2020/07/03 23:28:51 uwe Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
@ -34,7 +34,7 @@
#if 0
static char sccsid[] = "@(#)touchwin.c 8.2 (Berkeley) 5/4/94";
#else
__RCSID("$NetBSD: touchwin.c,v 1.31 2019/04/24 07:09:44 blymn Exp $");
__RCSID("$NetBSD: touchwin.c,v 1.32 2020/07/03 23:28:51 uwe Exp $");
#endif
#endif /* not lint */
@ -177,8 +177,13 @@ wtouchln(WINDOW *win, int line, int n, int changed)
__CTRACE(__CTRACE_LINE, "wtouchln: (%p) %d, %d, %d\n",
win, line, n, changed);
#endif
if (line + n > win->maxy)
line = win->maxy - n;
if (line < 0 || win->maxy <= line)
return ERR;
if (n < 0)
return ERR;
if (n > win->maxy - line)
n = win->maxy - line;
for (y = line; y < line + n; y++) {
if (changed == 1)
_cursesi_touchline_force(win, y, 0,