This is a note to let you know that I've just added the patch titled serial: sh-sci: Don't allow CS5-6 to the 5.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: serial-sh-sci-don-t-allow-cs5-6.patch and it can be found in the queue-5.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 1191133a4a4e289d7eb8949bbdb6f6d6e7a92266 Author: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx> Date: Thu May 19 11:18:04 2022 +0300 serial: sh-sci: Don't allow CS5-6 [ Upstream commit 9b87162de8be26bf3156460b37deee6399fd0fcb ] Only CS7 and CS8 seem supported but CSIZE is not sanitized from CS5 or CS6 to CS8. Set CSIZE correctly so that userspace knows the effective value. Incorrect CSIZE also results in miscalculation of the frame bits in tty_get_char_size() or in its predecessor where the roughly the same code is directly within uart_update_timeout(). Fixes: 1da177e4c3f4 (Linux-2.6.12-rc2) Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20220519081808.3776-6-ilpo.jarvinen@xxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 0f9b8bd23500..0075a1420005 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2379,8 +2379,12 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios, int best_clk = -1; unsigned long flags; - if ((termios->c_cflag & CSIZE) == CS7) + if ((termios->c_cflag & CSIZE) == CS7) { smr_val |= SCSMR_CHR; + } else { + termios->c_cflag &= ~CSIZE; + termios->c_cflag |= CS8; + } if (termios->c_cflag & PARENB) smr_val |= SCSMR_PE; if (termios->c_cflag & PARODD)