[PATCH v4 15/24] n_tty: Reset lnext if canonical mode changes

From: Peter Hurley
Date: Sat Jun 15 2013 - 09:25:14 EST

lnext escapes the next input character as a literal, and must
be reset when canonical mode changes (to avoid misinterpreting
a special character as a literal if canonical mode is changed
back again).

lnext is specifically not reset on a buffer flush so as to avoid
misinterpreting the next input character as a special character.

Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
drivers/tty/n_tty.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index c7f71cb..e63beab 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1574,6 +1574,7 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
ldata->canon_head = ldata->read_tail;
ldata->erasing = 0;
+ ldata->lnext = 0;

if (canon_change && !L_ICANON(tty) && read_cnt(ldata))

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