linux-kernel - [PATCH 5.11 007/601] tty: moxa: fix TIOCSSERIAL jiffies conversions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210512144828.065186912@linuxfoundation.org>
Date:   Wed, 12 May 2021 16:41:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Johan Hovold <johan@...nel.org>
Subject: [PATCH 5.11 007/601] tty: moxa: fix TIOCSSERIAL jiffies conversions

From: Johan Hovold <johan@...nel.org>

commit 6e70b73ca5240c0059a1fbf8ccd4276d6cf71956 upstream.

The port close_delay parameter set by TIOCSSERIAL is specified in
jiffies, while the value returned by TIOCGSERIAL is specified in
centiseconds.

Add the missing conversions so that TIOCGSERIAL works as expected also
when HZ is not 100.

Cc: stable@...r.kernel.org
Signed-off-by: Johan Hovold <johan@...nel.org>
Link: https://lore.kernel.org/r/20210407102334.32361-11-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/tty/moxa.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -2040,7 +2040,7 @@ static int moxa_get_serial_info(struct t
 	ss->line = info->port.tty->index,
 	ss->flags = info->port.flags,
 	ss->baud_base = 921600,
-	ss->close_delay = info->port.close_delay;
+	ss->close_delay = jiffies_to_msecs(info->port.close_delay) / 10;
 	mutex_unlock(&info->port.mutex);
 	return 0;
 }
@@ -2069,7 +2069,7 @@ static int moxa_set_serial_info(struct t
 			return -EPERM;
 		}
 	}
-	info->port.close_delay = ss->close_delay * HZ / 100;
+	info->port.close_delay = msecs_to_jiffies(ss->close_delay * 10);
 
 	MoxaSetFifo(info, ss->type == PORT_16550A);