From patchwork Wed Jun 29 20:00:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helge Deller X-Patchwork-Id: 585926 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 41150C433EF for ; Wed, 29 Jun 2022 20:00:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230170AbiF2UAe (ORCPT ); Wed, 29 Jun 2022 16:00:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36990 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229654AbiF2UAd (ORCPT ); Wed, 29 Jun 2022 16:00:33 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4DA96647C for ; Wed, 29 Jun 2022 13:00:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1656532825; bh=+PhE9gEb0wg52MazwR2KFiYIHZksA16xFvrhrwFiyUo=; h=X-UI-Sender-Class:From:To:Subject:Date; b=SvhoyemmIjtmO4igUqb5PX6RVybnQ391V9C+asZNG4CV+ZfwqtywzzJ+NAj4ofMkD ik8+jI/Ldhbe6rUzNeEwlgB51A6GP3zRXVxK4nrMNB5GKm1SRDb4Ym9XPoj9H9r5xt 12rkB0XD6ohVfQQH7SdfuHuT5ignhPOZZQcL8wJY= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from p100.fritz.box ([92.116.135.51]) by mail.gmx.net (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MJE2D-1oMvFy0vYh-00Kfcr; Wed, 29 Jun 2022 22:00:25 +0200 From: Helge Deller To: daniel.vetter@ffwll.ch, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, geert@linux-m68k.org Subject: [PATCH 0/5] fbcon: Fixes for screen resolution changes - round 2 Date: Wed, 29 Jun 2022 22:00:19 +0200 Message-Id: <20220629200024.187187-1-deller@gmx.de> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 X-Provags-ID: V03:K1:pvJPcA1LYSqt06HvIFX9cBbCycAVwyAe7HfD5+o0Z+mAdnqNMtM YYhl7x45j2i5u89w501lC5jUJDxEP1LIxh/4XI3HCumUo+7FvLwVIRINGpbMKICbKn0CjPq AxUZKKSIyaZI/lpGRyGJkfBwhQcWaOkEWB0yY767JnJ4LD24TbF5dUxVaI2upAEBiD3QN0o FtP1sHxYRKZloF3KX0Q/g== X-UI-Out-Filterresults: notjunk:1;V03:K0:sgzMoBZ5sIY=:avfGKEQiMPMbqdaGZa91BA qqEsm9Bstp5jwmyPVldQ/wN/vOSEIUiqIeDp8QMZt5aJRbif8KJYufdeTMFo80+jbfqfHrECc XtwvJlKYp4CDUD0f6YQg/aXVAlyyoe2ChoG48q7Qn1vkEVJqGGnxeh9L17dU99uBtR1ITZdxU 67WZ2ZOqckzOXiyo8QpNN9t/6VEx4KCOS2dwCKdIjYZm3hShYHahAgTjQ1gaBDJ3meqF6j/TK E5lioz6M5/gLcr2StjzsZaJk3ClMx/9wZ0i73tjPPXAEnrPiMj94g6o+VKGucEXEdXWZxMni9 yNrXh447/a7cL4gQHxf9w9MNQI7qhtQ+/jsapewfjkaXpAiDb0K5eZ9C+o9jcXj+w4yx1lNNO gCs5qXn5GR/LH0vFBON30iypNzTle9szKdZHl+qjhbisMDJcyfcLHelq9nZ0E/h4h3krJ99oW 319S/ySld4rOQEzFL/1HWO83txPyIVY/Ur3c1kELEXpG4c1tVL7pAx0bpURITgOGXX1jBrI97 rDKv+zEF+wdhWHQGfpVcQ9sa4JoXiPu/FjfUfjvMvsUmeaUgWzfwUb8F1gG1sik0NdAmPBFbH VkgHwYC2rXTXH1qDyXkDWuR30dZa29LdkQDgKfXNhUw09+QgwbSsrRxI6Z/ywkhejdRAYATa7 qTYlMQXVrE44jeaF4Hii/vWrS6rwbpXGHpL+lCqDM3Zn7pzCfjDHBb0hZ1IIhUcc6x+ph+Uxd Svxe6Ps66sXCEp+QlgjuF0WjdIm9/8qqlvnjG/LuK9SpSQsibHkyeyc79DFYCK/9nicCNdenP Nj1tOfXzWWdjHSQ02IC7jUzazAQw4n0MJrCiCO8c1DKA2h5ZGqsZ2oO9+aCn25yuBBNn9O079 PoTnubrmn7nV/yyqrUl8giNSwQfozpoT70vorILbLJNotg4atb0fYxtB9cX6WVn0wn1KGAZTv IrEyDBfcrNwlAGpY/t9mGDYtlvFt6p747XR03Q6iVjE/oQumVE/4iIvuYRV4TWSwb3isBPPQV 15qzIQhJKsDIQI56CTEyM45T6rUnLnLMrpO1JW3Vw65Xxus8LR3WKjlxTT951HZPUnnoOAAKg McIaLI4wmlC0C4flBvlXT1eS40qdufjbzSt6j0JrRJHU1Jp1tLOrHs0xQ== 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. Helge Deller (5): fbcon: Disallow setting font bigger than screen size fbcon: Fix up user-provided virtual screen size fbcon: Prevent that screen size is smaller than font size fbmem: Prevent invalid virtual screen sizes in fb_set_var() fbcon: Use fbcon_info_from_console() in fbcon_modechange_possible() drivers/video/fbdev/core/fbcon.c | 33 ++++++++++++++++++++++++++++++++ drivers/video/fbdev/core/fbmem.c | 15 ++++++++++++++- include/linux/fbcon.h | 4 ++++ 3 files changed, 51 insertions(+), 1 deletion(-) --- 2.35.3