From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756838AbaBFUWK (ORCPT ); Thu, 6 Feb 2014 15:22:10 -0500 Received: from fep36.mx.upcmail.net ([62.179.121.54]:45538 "EHLO fep36.mx.upcmail.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751336AbaBFUVZ (ORCPT ); Thu, 6 Feb 2014 15:21:25 -0500 X-Greylist: delayed 957 seconds by postgrey-1.27 at vger.kernel.org; Thu, 06 Feb 2014 15:21:24 EST X-SourceIP: 94.113.216.134 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= To: Cc: Greg Kroah-Hartman , =?UTF-8?q?Jean-Fran=C3=A7ois=20Moine?= , =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= Subject: [PATCH] vt: Fix secure clear screen Date: Thu, 6 Feb 2014 21:01:23 +0100 Message-Id: <1391716883-31383-1-git-send-email-petr.pisar@atlas.cz> X-Mailer: git-send-email 1.8.5.3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org \E[3J console code (secure clear screen) needs to update_screen(vc) in order to write-through blanks into off-screen video memory. This has been removed accidentally in 3.6 by: commit 81732c3b2fede049a692e58a7ceabb6d18ffb18c Author: Jean-François Moine Date: Thu Sep 6 19:24:13 2012 +0200 tty vt: Fix line garbage in virtual console on command line edition Signed-off-by: Petr Písař --- drivers/tty/vt/vt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 61b1137..23b5d32 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1164,6 +1164,8 @@ static void csi_J(struct vc_data *vc, int vpar) scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, vc->vc_screenbuf_size >> 1); set_origin(vc); + if (CON_IS_VISIBLE(vc)) + update_screen(vc); /* fall through */ case 2: /* erase whole display */ count = vc->vc_cols * vc->vc_rows; -- 1.8.5.3