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    Subject[PATCH 4.8 059/138] vt: clear selection before resizing
    Date
    4.8-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    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;


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