Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753548AbcKYJFI (ORCPT ); Fri, 25 Nov 2016 04:05:08 -0500 Received: from mx2.suse.de ([195.135.220.15]:45297 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751948AbcKYIa4 (ORCPT ); Fri, 25 Nov 2016 03:30:56 -0500 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Scot Doyle , Jiri Slaby Subject: [PATCH 3.12 022/127] vt: clear selection before resizing Date: Fri, 25 Nov 2016 09:28:55 +0100 Message-Id: <863ad19fd654c485e3beec3575c4d74a1e74369e.1480062521.git.jslaby@suse.cz> X-Mailer: git-send-email 2.10.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1042 Lines: 36 From: Scot Doyle 3.12-stable review patch. If anyone has any objections, please let me know. =============== 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 Signed-off-by: Scot Doyle Signed-off-by: Jiri Slaby --- 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 19aba5091408..d52e653076f4 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -867,6 +867,9 @@ 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; -- 2.10.2