From: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Date: Thu, 19 May 2022 08:18:08 +0000 (+0300)
Subject: pcmcia: synclink_cs: Don't allow CS5-6
X-Git-Tag: v5.19-rc1~47^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ef44c6c1e86fa89f20d27713d7268d7c7689af5c;p=thirdparty%2Fkernel%2Flinux.git

pcmcia: synclink_cs: Don't allow CS5-6

Only CS7 and CS8 seem supported but CSIZE was not sanitized in termios
c_cflag. The driver sets 7 bits whenever data_bits is not 8 so default
to CS7 when CSIZE is not CS8.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220519081808.3776-10-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index c20f2cb784e86..0daf1bc953604 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -1418,7 +1418,11 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
 		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
 
 	/* byte size and parity */
-
+	if ((cflag & CSIZE) != CS8) {
+		cflag &= ~CSIZE;
+		cflag |= CS7;
+		tty->termios.c_cflag = cflag;
+	}
 	info->params.data_bits = tty_get_char_size(cflag);
 
 	if (cflag & CSTOPB)