Patch "tty: vt, fix bogus division in csi_J" has been added to the 4.4-stable tree

Patch "tty: vt, fix bogus division in csi_J" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    tty: vt, fix bogus division in csi_J

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     tty-vt-fix-bogus-division-in-csi_j.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 42acfc6615f47e465731c263bee0c799edb098f2 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@suse.cz>
Date: Mon, 3 Oct 2016 11:00:17 +0200
Subject: tty: vt, fix bogus division in csi_J
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Jiri Slaby <jslaby@suse.cz>

commit 42acfc6615f47e465731c263bee0c799edb098f2 upstream.

In csi_J(3), the third parameter of scr_memsetw (vc_screenbuf_size) is
divided by 2 inappropriatelly. But scr_memsetw expects size, not
count, because it divides the size by 2 on its own before doing actual
memset-by-words.

So remove the bogus division.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Petr Písař <ppisar@redhat.com>
Fixes: f8df13e0a9 (tty: Clean console safely)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/vt/vt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1178,7 +1178,7 @@ static void csi_J(struct vc_data *vc, in
 			break;
 		case 3: /* erase scroll-back buffer (and whole display) */
 			scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
-				    vc->vc_screenbuf_size >> 1);
+				    vc->vc_screenbuf_size);
 			set_origin(vc);
 			if (CON_IS_VISIBLE(vc))
 				update_screen(vc);


Patches currently in stable-queue which might be from jslaby@suse.cz are

queue-4.4/tty-vt-fix-bogus-division-in-csi_j.patch