From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 4F982331EA1; Tue, 30 Jun 2026 09:21:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782811316; cv=none; b=fss+FmeSmqdU1QnLy6cnfYwUTzaoi5J3bXDKD3GzaOImvgCKkgUwRwsHxLj/nW54rnk9nNkRIc5Hwy/4r3qUemX9hXVMkjsUFOcM4n+EmAjOWIo4GKuCYrb2VD7IC15UL/ZG4ftLENsseDWdStSfuRdQE0Y9Kmwoyg/0mhVcZV4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782811316; c=relaxed/simple; bh=Ei8HZnDIpEU1SQi8sI2tGRTbiKCMoBDZ3k2LMoyZNvQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=JJ42eXWs/GOcyz0sfU2e+WCjpAD6/NOBNyj8JPLHZsSXqc0JfumDMUo/w7aEPd77a3W/PO6H235PHATqhS4XRVPfrqGpQOhYl8KaFWRfd4JLI98rEH+q5wpH5BQAR9LLdptbkkxXhll+zaAD71a7sN6mAh1s4GFBlHRDHfjuP/8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ZQMZz+Rn; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ZQMZz+Rn" 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> 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: <5fbd827c-4c4d-4364-882c-41d2fe666fde@stu.xidian.edu.cn> 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