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Commit 6f9b028a authored by Peter Hurley's avatar Peter Hurley Committed by Greg Kroah-Hartman
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n_tty: Reset lnext if canonical mode changes 



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: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6d76bd26

drivers/tty/n_tty.c

+1 −0
Original line number Diff line number Diff line
@@ -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))