From mboxrd@z Thu Jan 1 00:00:00 1970 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E6586C43458 for ; Mon, 29 Jun 2026 15:40:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5C0E310E970; Mon, 29 Jun 2026 15:40:13 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Rk5K7dhb"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8767410E970 for ; Mon, 29 Jun 2026 15:40:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1782747612; x=1814283612; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=mNEmfpypvUNZ+gR4xPR0xDDTBTDrRcJEbt3dRM+/o1M=; b=Rk5K7dhb77u55s6MUkk/MYszdBbNQ5wrILqdidyuV1tMhzNxvmwuSZoi UnHwkUZ9HvCzLqlAhOBg/QfB9usgBPvXzumy7Ade6nZXz/a7tGxrM72ey FYmCm1zuAhbaeV3HjSii0RYoHpQ193b2bmdCKHZNomfW7dVbE7c6yhv7R LvpFTLiwG0yQFiWK0cNpQ/MczKjO+AQf/7xPc3IiGr1sF9asOEH87q4qv YFetEL4AB8gN1hGiQ1bbBQsTQCsFsmAKUrDo225zv8lZXtW+ud4zM+w2Q Mib5VpIqOBaevKZkiozEV9iiYHvizi+Y0sMuUCqiH64aT5o4Aa9lKVPBr g==; X-CSE-ConnectionGUID: eGpcweMJRfmXhO5HJKNGBA== X-CSE-MsgGUID: 9QFfuwYlQg6aoLgviaeFBw== X-IronPort-AV: E=McAfee;i="6800,10657,11832"; a="108986420" X-IronPort-AV: E=Sophos;i="6.24,232,1774335600"; d="scan'208";a="108986420" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jun 2026 08:40:11 -0700 X-CSE-ConnectionGUID: dSYOS7uKT4WN/nRMbsXWyQ== X-CSE-MsgGUID: ZeBTgg84Q1Wb/e1V1Tutvw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,232,1774335600"; d="scan'208";a="256909319" Received: from tassilo.jf.intel.com (HELO tassilo) ([10.54.38.190]) by fmviesa005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jun 2026 08:40:11 -0700 Date: Mon, 29 Jun 2026 08:40:09 -0700 From: Andi Kleen To: Alexander Martyniuk Cc: stable@vger.kernel.org, Greg Kroah-Hartman , David Airlie , Sasha Levin , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Mingyu Wang <25181214217@stu.xidian.edu.cn>, Lukas Wunner Subject: Re: [PATCH 5.10/5.15/6.1/6.6/6.12] agp/amd64: Fix broken error propagation in agp_amd64_probe() Message-ID: References: <20260629102124.252403-1-alexevgmart@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260629102124.252403-1-alexevgmart@gmail.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Mon, Jun 29, 2026 at 01:21:23PM +0300, Alexander Martyniuk wrote: > From: Mingyu Wang <25181214217@stu.xidian.edu.cn> > > commit b08472db93b1ccff84a7adec5779d47f0e9d3a30 upstream. > > A NULL pointer dereference was observed in the AMD64 AGP driver when > running in a virtualized environment (e.g. qemu/kvm) without a physical > AMD northbridge. The crash occurs in amd64_fetch_size() when attempting > to dereference the pointer returned by node_to_amd_nb(0). What is special about this virtual environment? Nobody else seems to have seen that in 20+ years. Or maybe the Fixes tag is not quite correct and something else more recent has caused it. -Andi