| From | Willy Tarreau <> | Subject | [PATCH 3.10 215/319] vt: clear selection before resizing | Date | Sun, 5 Feb 2017 20:20:37 +0100 |
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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: Willy Tarreau <w@1wt.eu> --- drivers/tty/vt/vt.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 5deddca..010ec70 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -869,6 +869,9 @@ 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; -- 2.8.0.rc2.1.gbe9624a
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