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 36A83C43602 for ; Tue, 30 Jun 2026 09:21:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3655810EBCE; Tue, 30 Jun 2026 09:21:56 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ZQMZz+Rn"; dkim-atps=neutral Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3B0D510EBCE for ; Tue, 30 Jun 2026 09:21:55 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 041CE41699; Tue, 30 Jun 2026 09:21:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6C9D51F000E9; Tue, 30 Jun 2026 09:21:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1782811314; bh=8UVj/xbCgEWxRoJHuLmtaRwcHH6P04xVZjzmRYgd69w=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=ZQMZz+RnUAGPb7y8VDGwbYpRXk8/gR7jpxdyA7xypKYocm0TfU3xtlGEvgsHFHbXy Ne66zYC08qAlefoIOXkpEH5HbelIW5u8IquK60mFLkBAebdxiiGHnOAnc/EPl9UD00 DzCnihP4oakIUiw90A5Qp4T5AE89R5LA7puEYxNU= Date: Tue, 30 Jun 2026 11:21:51 +0200 From: Greg Kroah-Hartman To: Mingyu Wang <25181214217@stu.xidian.edu.cn> Cc: Andi Kleen , Alexander Martyniuk , stable@vger.kernel.org, David Airlie , Sasha Levin , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, 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: <2026063021-ripple-uranium-f24e@gregkh> References: <20260629102124.252403-1-alexevgmart@gmail.com> <5fbd827c-4c4d-4364-882c-41d2fe666fde@stu.xidian.edu.cn> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5fbd827c-4c4d-4364-882c-41d2fe666fde@stu.xidian.edu.cn> 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 Tue, Jun 30, 2026 at 09:23:50AM +0800, Mingyu Wang wrote: > > > 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. > > Hi Andi, > > > You are right that normal users will not see this crash in the wild. > > The environment is a QEMU-based driver fuzzing framework. Rather than > functionally emulating specific hardware, the framework extracts device > matching information from the driver and synthesizes a mock PCI device just > to trigger the driver's binding and initialization paths. > > In this case, the synthesized PCI device matched the AGP bridge's IDs, > forcing `agp_amd64_probe()` to run. However, because this is a synthetic > fuzzing environment, there was no physical or emulated AMD Northbridge > present in the system. Which means this is a contrivied environment that no one will actually use, so there is no need to backport this change anywhere. thanks, greg k-h