From patchwork Sat Jun 25 23:27:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helge Deller X-Patchwork-Id: 12895528 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84655C43334 for ; Sat, 25 Jun 2022 23:27:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233550AbiFYX1M (ORCPT ); Sat, 25 Jun 2022 19:27:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233365AbiFYX1K (ORCPT ); Sat, 25 Jun 2022 19:27:10 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B96312608 for ; Sat, 25 Jun 2022 16:27:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1656199624; bh=Qs/pH1q8+WXCBzpHp5+tsgK0kJz9Prg89jDdOUgeLAA=; h=X-UI-Sender-Class:From:To:Subject:Date; b=YJ16LATVAaqDEXfCqWX5kIBiOqbb25j7I+qIL7A2K2a8NpJ8PSiVNZqdJWnS4N7me IstGzkCnfTiIkKyRuK4RtqpGuMtSwHzhoPje5ih4vqd+TbBYQ61NcJmHu9QMctmh2B TvjI8KN+xXynZ4b3K9QdVBVfZbSvw0NQnmkLUfbQ= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from p100.fritz.box ([92.116.162.44]) by mail.gmx.net (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1Mwwdl-1nkWfb17ql-00yQmJ; Sun, 26 Jun 2022 01:27:04 +0200 From: Helge Deller To: dri-devel@lists.freedesktop.org, daniel.vetter@ffwll.ch, linux-fbdev@vger.kernel.org Subject: [PATCH v4 0/3] fbcon: Fixes for screen resolution changes Date: Sun, 26 Jun 2022 01:27:00 +0200 Message-Id: <20220625232703.401821-1-deller@gmx.de> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 X-Provags-ID: V03:K1:lTnu1fWOblBzAat1bEuzW7oF1e3UKUcZeu/M+VCzlJ23+/20LFI 5mJijGdDsy2fJ37/oVM3O+3PWzIexomzymXrupCcfSe6pczYioPvldQyftt8Vw+h/hEyaGA ZXMACwoyrKQxwjW0/Os4Wu3RwVi7RgM9Myql+e1UFkjEZOQPwf2GGFNwLOPyGr1KXyJgw1a qyTzXScT6S9fdXBEOd/mw== X-UI-Out-Filterresults: notjunk:1;V03:K0:1eji9Z9Anrw=:aAATJbBTosvcG9m5QoRsSy qXGSeB9c5QYJmAYzfurxMtj7kEfUapDJ/Hd/Yi1K7xgG++CGzr2a5UhnFhLjgS++6Wcdqsi0G AbufOpADeuN7RH29nuCHK5NbAPab9urXnWGxi/84yc+81WCFdJM3LpWNMtBkDlO3KH9g4LGKX veJlIVCq0/1Da5iqMVdP4nkFGsK6YSuhuA/vsEMPTV+fh8z65OXs/HzlexjYN16rVOokEJP1B s3QQFWKR75INtHvZoGFlldTa85eUII1R3+bofD54789NgAmYTw1BSFcwVgyHA7fVXC+9KFyQ1 nBJLu38ke6RINTqpMw7nCh+MjZrrbkKJVCDrqwbb359Iu1dj07jTObknDG8KZKKKISnl/2MxB JMMVzUDfQEFtlqmvrleyUkkGbF1GX+qVO6KYOKqZUTVxHF+oBM+GouOtXVC9gMRytylYvwHks JxqHZbXnTtjv2n4lP14hu5fHbEGjUo1WaYNQmp3Jd6cEDQf2lHWNoCH+4IrhVA5HMX2kTf5vU dflIErQDRrFUiuY9H2u3bzktDNu3qqCeHldskvS5T+MiWsii5Sz+97n+j5EBFPG95nBpJ3R8i 2ZwRXBDialSUTaJzNMljTQ8ebvBD5wD5ySFdZ0zQKsTtQm0aBFAxxter+Ehjgziuvpoe4aHB+ /SXwiK/PE90WYSOU366i0Ru0/7VcAUNgBeVnz5Sy0lAAkxyHKs5JHmlmXWtJSG3ZQlcQs3+cX G9ODcugYYyJGe5GWx60e8mhIDql7D4uO5XZMMYS4QaWlzA+dmlRDiXLDJisHibfMIjtNl3ijw jaaZNl8WcxF0NyFVQ+Ok9GWUJHYmermSZJG0EPwx1CfJDq+a7weHyQ0qnyTnOTphDNhqpkZJs M/psjUehPjzUT0ZhL4ugXKm5BluZyCffhTZdah7mqixX8log6dLPCWRT9TAWC1tLRBLAqgVx9 VQcuJB8/rJCx5ARsRm8lQs55bGz8a73SZmFsgnWONlfmhWFb6VOE5dWqJB7zk+thkuAUr+a9e FUDSV3CbDyqC8ymcN0U9O/QUGRme5vw7mto+v/+QvwN6fFCgkt+50UMBv59kUz0Vjvrc+GgNE gl+2Aypw/Vz/YweybwSqxl9hog2zTjhbEa/mBMpywBagQu1B9wF6PILcA== Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org This series fixes possible out-of-bound memory accesses when users trigger screen resolutions changes with invalid input parameters, e.g. reconfigures screen which is smaller than the current font size, or if the virtual screen size is smaller than the physical screen size. v4: - merged former patch #2 and #3 - added more Reviewed-by - new patch #2 needs more testing. Note added to comit message that another patch needs to be backport as well. Helge Deller (3): fbcon: Disallow setting font bigger than screen size fbcon: Prevent that screen size is smaller than font size fbmem: Prevent invalid virtual screen sizes drivers/video/fbdev/core/fbcon.c | 32 ++++++++++++++++++++++++++++++++ drivers/video/fbdev/core/fbmem.c | 10 +++++++++- include/linux/fbcon.h | 4 ++++ 3 files changed, 45 insertions(+), 1 deletion(-) --- 2.35.3