From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C963E3B42DC; Mon, 29 Jun 2026 15:40:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.7 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782747614; cv=none; b=BOZvl31Itnda82YSiWhfu+gKAsU2XvtsOWtMyvFHSHQyWjNA91nd3liEtYewF9/yOYBN1GZ0yakyY+o6B1ljiO44l4i7RPGiaqOLeqySzvH3KVpnoYnF0loZ03gfNt+xJ6pT8/pYU3gNmc1MCiOx7hq9WKhVZQs7UNegSJZdens= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782747614; c=relaxed/simple; bh=mNEmfpypvUNZ+gR4xPR0xDDTBTDrRcJEbt3dRM+/o1M=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=FLh5egs1iftnfVV3ajSu1YOzezMDVvcl9dtcVfjarXReRW3rf54rYYQQvN+j+z0eLVPU5f62KIOUY9JxqLbP3flqkmN5hGIF6vO4embn04loNwzHr1ruAOwFXVLhNIFYUFO+4XhYuejBtCgS9XQ0MikhbVHlbpsihGImGaZy56k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Rk5K7dhb; arc=none smtp.client-ip=192.198.163.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Rk5K7dhb" 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: 6uIGsCPRTmOLDeRlTCbQ4A== X-CSE-MsgGUID: b0T72LNnT0uXc2JZkJVl/A== X-IronPort-AV: E=McAfee;i="6800,10657,11832"; a="108986417" X-IronPort-AV: E=Sophos;i="6.24,232,1774335600"; d="scan'208";a="108986417" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260629102124.252403-1-alexevgmart@gmail.com> 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