diff options
| author | Scot Doyle <lkml14@scotdoyle.com> | 2016-10-13 12:12:43 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-10 16:38:50 +0100 |
| commit | eeae0a12a16650ff494d5faefa371cd9e7079575 (patch) | |
| tree | 3488556d34a5e330bd030b1e9193570ad9e1e0ca | |
| parent | 9710f5b193284e7c9f47d70de7378fe758b4e12a (diff) | |
vt: clear selection before resizing
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>
| -rw-r--r-- | drivers/tty/vt/vt.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 2705ca960e92..2ef6b033206a 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -874,6 +874,9 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, if (!newscreen) return -ENOMEM; + if (vc == sel_cons) + clear_selection(); + old_rows = vc->vc_rows; old_row_size = vc->vc_size_row; |