Received: by 2002:a05:6a10:a852:0:0:0:0 with SMTP id d18csp2930710pxy; Mon, 3 May 2021 11:08:16 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz2xVC3Qr2TU3FEOKpufLk4u41FdN5Ss7PcapCBTkPdHZa8cNaXN8FmHXEogDR5aBvuhU+g X-Received: by 2002:a17:90a:fd95:: with SMTP id cx21mr31644708pjb.137.1620065295965; Mon, 03 May 2021 11:08:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1620065295; cv=none; d=google.com; s=arc-20160816; b=RtaOIc6DIGDXJWuSdznaHhSs7GauVG59Hed2tV11QtdUnYnIoGPksqhwhbqQjtsB5e lPjOqatecY+erktn3NOc+NlfBAImCTRfZIv9RmrnQAM+uQu49J+K6e6OH75LJUj36B6X 0nH6zSVMbgWqdMOGm8yLxamnrnTK4xtR4vVuuiz2k9caomujpg16AxILWTahJLOF2OAM pChx/U85gx0OrK2O9ktQZRbzqeryukJ1Re3QlJv97avshKdRCLxdDZtlm4cj4H2wBMW7 LoTIq4NUuBcgxdkJzrf7kd+4N1V+wl59QkPJ17eu2bIvYED1+DoLoPmaF34yWz3BtQUD UGYg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:organization:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :ironport-sdr:ironport-sdr; bh=vk0XqcBDX994BQ3lUsRpDApXfNWuO1IxVLT73AVWxCw=; b=ORTd955gPDq/O+GAQv/0h+yPUiXDD8QvROt6XLQp3++22XmxNU83MkPGsyk4VhxBAr TasLlYNajSEJECdAosSyyMHmUcBt8AW36lPP+tqAWmm0x/zedhGRdUMQMgTZODbiIeCl 9S7Mq/26DoMfT7xqDvzGRQvr7RYXraetFOyxrXoV/1tCilogPTdHdtaMu3ob6akUlHvl HZ0E/4myCh5bk5k/t7GjakbmVE6se4BabnuXzpAci9v0IFXmtjd/a5bJsEUMxVCoGLk5 yBnHaehy6YN2qVPH1twL/rNVnTC03+TjBcSzgahfAm2X/TLR21xAlC6ZXZEfgMMqBWnD UxkA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id q10si408618pgm.285.2021.05.03.11.07.54; Mon, 03 May 2021 11:08:15 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234396AbhECNpd (ORCPT + 99 others); Mon, 3 May 2021 09:45:33 -0400 Received: from mga11.intel.com ([192.55.52.93]:40533 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233159AbhECNpb (ORCPT ); Mon, 3 May 2021 09:45:31 -0400 IronPort-SDR: KW/lmZeDThbqGT/G8ohXE0RrQjA6ZOZ8kzZuRxLRs/AemjjcuGDR/ku5SFg7FApF0G182jpiCC rz+WnG7hOQtw== X-IronPort-AV: E=McAfee;i="6200,9189,9973"; a="194599329" X-IronPort-AV: E=Sophos;i="5.82,270,1613462400"; d="scan'208";a="194599329" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 May 2021 06:44:37 -0700 IronPort-SDR: GURVkr9B8GzRJo4MUYh1yQbB4MCXVa+9RP88dFlCc/C528SG8waOt26o8RJEQcu4tlJ8JwQihT C3OUyGYlfWbg== X-IronPort-AV: E=Sophos;i="5.82,270,1613462400"; d="scan'208";a="462542361" Received: from smile.fi.intel.com (HELO smile) ([10.237.68.40]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 May 2021 06:44:29 -0700 Received: from andy by smile with local (Exim 4.94) (envelope-from ) id 1ldYs4-009HF3-7p; Mon, 03 May 2021 16:44:24 +0300 Date: Mon, 3 May 2021 16:44:24 +0300 From: Andy Shevchenko To: Frieder Schrempf Cc: Marc Kleine-Budde , linux-can@vger.kernel.org, Wolfgang Grandegger , "David S. Miller" , Jakub Kicinski , Liam Girdwood , Mark Brown , Vincent Mailhol , Oliver Hartkopp , Timo =?iso-8859-1?B?U2NobPzfbGVy?= , Tim Harvey , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Null pointer dereference in mcp251x driver when resuming from sleep Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 03, 2021 at 03:11:40PM +0200, Frieder Schrempf wrote: > Hi, > > with kernel 5.10.x and 5.12.x I'm getting a null pointer dereference > exception from the mcp251x driver when I resume from sleep (see trace > below). > > As far as I can tell this was working fine with 5.4. As I currently don't > have the time to do further debugging/bisecting, for now I want to at least > report this here. > > Maybe there is someone around who could already give a wild guess for what > might cause this just by looking at the trace/code!? Does revert of c7299fea6769 ("spi: Fix spi device unregister flow") help? -- With Best Regards, Andy Shevchenko