Patch "vt: clear selection before resizing" has been added to the 4.8-stable tree

Patch "vt: clear selection before resizing" has been added to the 4.8-stable tree

[gregkh]

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

    vt: clear selection before resizing

to the 4.8-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:
     vt-clear-selection-before-resizing.patch
and it can be found in the queue-4.8 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 009e39ae44f4191188aeb6dfbf661b771dbbe515 Mon Sep 17 00:00:00 2001
From: Scot Doyle <lkml14@scotdoyle.com>
Date: Thu, 13 Oct 2016 12:12:43 -0500
Subject: vt: clear selection before resizing

From: Scot Doyle <lkml14@scotdoyle.com>

commit 009e39ae44f4191188aeb6dfbf661b771dbbe515 upstream.

When resizing a vt its selection may exceed the new size, resulting in
an invalid memory access [1]. Clear the selection before resizing.

[1] http://lkml.kernel.org/r/CACT4Y+acDTwy4umEvf5ROBGiRJNrxHN4Cn5szCXE5Jw-d1B=Xw@mail.gmail.com

Reported-and-tested-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/vt/vt.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -874,6 +874,9 @@ static int vc_do_resize(struct tty_struc
 	if (!newscreen)
 		return -ENOMEM;
 
+	if (vc == sel_cons)
+		clear_selection();
+
 	old_rows = vc->vc_rows;
 	old_row_size = vc->vc_size_row;
 


Patches currently in stable-queue which might be from lkml14@scotdoyle.com are

queue-4.8/vt-clear-selection-before-resizing.patch