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Commit 0930b095 authored by Petr Písař's avatar Petr Písař Committed by Greg Kroah-Hartman
Browse files

vt: Fix secure clear screen 



\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 81732c3b
Author: Jean-François Moine <moinejf@free.fr>
Date:   Thu Sep 6 19:24:13 2012 +0200

    tty vt: Fix line garbage in virtual console on command line edition

Signed-off-by: default avatarPetr Písař <petr.pisar@atlas.cz>
Cc: stable <stable@vger.kernel.org> # 3.6
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 45a7bd63

drivers/tty/vt/vt.c

+2 −0
Original line number Diff line number Diff line
@@ -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;