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| author | Petr Písař <petr.pisar@atlas.cz> | 2014-02-06 21:01:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-22 13:34:49 -0800 |
| commit | 3316167944a0329b2f62fc2f4b28262c4fd0b60a (patch) | |
| tree | 0d6f25bd67c5fc3626413b881d04f27674d8b0b0 | |
| parent | a41a754592fa9fe0a871c3456b584981736871f1 (diff) | |
| download | lwn-3316167944a0329b2f62fc2f4b28262c4fd0b60a.tar.gz lwn-3316167944a0329b2f62fc2f4b28262c4fd0b60a.zip | |
vt: Fix secure clear screen
commit 0930b0950a8996aa88b0d2ba4bb2bab27cc36bc7 upstream.
\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 <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: Petr Písař <petr.pisar@atlas.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/vt/vt.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 61b1137d7e56..23b5d32954bf 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; |