linux-kernel - [PATCH 1/2] tty: ldisc: Fix misuse of proc_dointvec "ldisc

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Message-Id: <20190625030801.24538-1-devel@etsukata.com>
Date:   Tue, 25 Jun 2019 12:08:00 +0900
From:   Eiichi Tsukata <devel@...ukata.com>
To:     gregkh@...uxfoundation.org, jslaby@...e.com, davem@...emloft.net,
        kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc:     Eiichi Tsukata <devel@...ukata.com>
Subject: [PATCH 1/2] tty: ldisc: Fix misuse of proc_dointvec "ldisc_autoload"

/proc/sys/dev/tty/ldisc_autoload assumes given value to be 0 or 1. Use
proc_dointvec_minmax instead of proc_dointvec.

Fixes: 7c0cca7c847e "(tty: ldisc: add sysctl to prevent autoloading of ldiscs)"
Signed-off-by: Eiichi Tsukata <devel@...ukata.com>
---
 drivers/tty/tty_ldisc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index e38f104db174..a8ea7a35c94e 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -863,7 +863,7 @@ static struct ctl_table tty_table[] = {
 		.data		= &tty_ldisc_autoload,
 		.maxlen		= sizeof(tty_ldisc_autoload),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
+		.proc_handler	= proc_dointvec_minmax,
 		.extra1		= &zero,
 		.extra2		= &one,
 	},
-- 
2.21.0