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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1911CC433F5 for ; Fri, 12 Nov 2021 21:29:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F17F6610A5 for ; Fri, 12 Nov 2021 21:29:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233565AbhKLVc1 (ORCPT ); Fri, 12 Nov 2021 16:32:27 -0500 Received: from lave.lost-in-the-void.net ([213.229.87.129]:35598 "EHLO lave.lost-in-the-void.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233668AbhKLVc0 (ORCPT ); Fri, 12 Nov 2021 16:32:26 -0500 X-Greylist: delayed 489 seconds by postgrey-1.27 at vger.kernel.org; Fri, 12 Nov 2021 16:32:26 EST Received: from localhost (localhost [127.0.0.1]) by lave.lost-in-the-void.net (Postfix) with ESMTP id 2A932902A0ED for ; Fri, 12 Nov 2021 21:21:25 +0000 (GMT) Authentication-Results: lave.lost-in-the-void.net (amavisd-new); dkim=pass reason="pass (just generated, assumed good)" header.d=lost-in-the-void.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d= lost-in-the-void.net; h=user-agent:message-id:subject:subject:to :from:from:date:date:content-transfer-encoding:content-type :content-type:mime-version; s=dkim; t=1636752075; x=1637616076; bh=3MNwzIY0hAwWUuBR7Iyqn0F0eCXkww5hc+xksYR/rA4=; b=aFVDH9CuyHk2 ufi1bbW8he4fwhFOVrt9PL833MpopmOaezvXNw4fY07pqvwltJxi36zkFJlyPiFT +09vpXNU/Wx/cMSlER4KmYUeNr/drlf/GSHeFNIdomLH/pZypIUXvZzYStizyA0k 2KavoGzJP8Nehn8JrjPzLtbk+Ke+s2A= X-Virus-Scanned: amavisd-new at lave.lost-in-the-void.net Received: from lave.lost-in-the-void.net ([127.0.0.1]) by localhost (lave.lost-in-the-void.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uSBbT5lJsYfk for ; Fri, 12 Nov 2021 21:21:15 +0000 (GMT) Received: from lave.lost-in-the-void.net (localhost [127.0.0.1]) by lave.lost-in-the-void.net (Postfix) with ESMTPSA id 94E4C902A0EB; Fri, 12 Nov 2021 21:21:13 +0000 (GMT) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Fri, 12 Nov 2021 21:21:13 +0000 From: Robert W To: xl@wp.pl Cc: linux-wireless@vger.kernel.org Subject: Bug/Regression - Ralink RT2800 kernel deference issue since kernel 5.14 Message-ID: X-Sender: rwbugreport@lost-in-the-void.net User-Agent: Roundcube Webmail Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Hi, I have recently tried to upgrade a system to run the 5.14 kernel and noticed that I was getting hangs on the system which seem to relate to this wireless dongle which I am running hostapd against to provide a small AP. Since that time kernel 5.15 was released and I have tested that kernel as well and the problem persists. The issue sometimes occurs within an hour and other times it takes a few hours. I have tried to narrow down what is causing the issue. I thought it might be a change elsewhere outside the mac80211/driver area so I tried to run the wireless backports 5.15-rc6 on top of the last stable kernel of 5.13 so as to have the smallest number of changes on the system. The backports crashes with the same error. I have included below the netconsole output and the gdb of the kernel module in question. The capture was from when I was using the backports, but the error is the same. I hope the pastebins are okay to use on the list. I did try to get some assistance on linux-wireless IRC and some one asked for the outputs I had for the information so I am reusing them here. The following pastebin is the data sent to a netconsole instance. https://pastebin.com/UxRrTtUh The gdb debug of the kernel module suggests this section of code. https://pastebin.com/iMzxWEVU I am able to run further tests if required. I am not a programmer, but I can usually apply code patches and build the resulting code. Please let me know if require any further information. -- Robert