From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964843Ab3CSUpR (ORCPT ); Tue, 19 Mar 2013 16:45:17 -0400 Received: from mailout02.c08.mtsvc.net ([205.186.168.190]:40512 "EHLO mailout02.c08.mtsvc.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757145Ab3CSUpN (ORCPT ); Tue, 19 Mar 2013 16:45:13 -0400 From: Peter Hurley To: Greg Kroah-Hartman , Jiri Slaby Cc: Min Zhang , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Peter Hurley Subject: [PATCH 15/18] n_tty: Reset lnext if canonical mode changes Date: Tue, 19 Mar 2013 16:21:50 -0400 Message-Id: <1363724513-15604-16-git-send-email-peter@hurleysoftware.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1363724513-15604-1-git-send-email-peter@hurleysoftware.com> References: <1363724513-15604-1-git-send-email-peter@hurleysoftware.com> X-Authenticated-User: 125194 peter@hurleysoftware.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 b1b934c..9d7badc 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1577,6 +1577,7 @@ 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