[PATCH v3 15/24] n_tty: Reset lnext if canonical mode changes

From: Peter Hurley
Date: Mon Apr 15 2013 - 11:40:52 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 6691920..98bc9df 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1575,6 +1575,7 @@ 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))
--
1.8.1.2

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