From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (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 4EDF45A782 for ; Wed, 7 Feb 2024 13:37:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707313042; cv=none; b=eJv1rSv8j7wgCt7/gM8oVgADtdVKHxuioEpbyNVk6VpLa6M8r1Sbuonu4LJ3onOMb2haCHwDo2p/LphT7fdzQQQ8ErWfvziibRqUgGB8a2CQVsHq1ZmbioiZ2MlfNne4CihaS/6fPFRMEtVh5xHl4MB/6Ndma97V5u34v1CMQIs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707313042; c=relaxed/simple; bh=+DujwZlr/1wDPIjgj9ybKGjheEDuRA+H2YGe6MkI++o=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=E/48e/N3oVLprW0tF1pwMkGnilkFbvKeqdUKUSB0OkJtzmDCgVI2h/5H0bwTmfHCyRpr3EUKA0r6AICAax6K9yHaoDGVwQoiNdirkGbUuQYEeOLUf46gkjRb811c8GXPnITm/2dKFWQzEdG8yjX5S6DwLgN7i/uxgtFMigmFMGg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=B8W0wRux; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none 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="B8W0wRux" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1707313041; x=1738849041; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=+DujwZlr/1wDPIjgj9ybKGjheEDuRA+H2YGe6MkI++o=; b=B8W0wRuxksZjkv1gOx2Gat6vE5Re8aqh50i0yXUTbv08s+4lKHGQ0xf5 linY49lS1HZHk94p9GAX9shpHa76sF679wS5Z9zTk5f3096bOnfzXfdbZ n0cr+5LQED2rCaVuBIyHuwJvxqcdOmSwV/xcRtNOUUu01ktd5m3IQXkph 77hwOhNNazPdrjzrFvMiPOqwQy2c4qz6nMD/IToD5IeiyvMn5YZ4Swccl kNhjl86OEKen40HMZjJs2ilaQzaibcMplEc7c9S7RkBvzwOFCBw5+vPqm pAK3ravKcPlxXtlx3s3a+Nem0d51bAXQyrqef7u+2A0k168zQL5mb/iut A==; X-IronPort-AV: E=McAfee;i="6600,9927,10976"; a="12345530" X-IronPort-AV: E=Sophos;i="6.05,251,1701158400"; d="scan'208";a="12345530" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Feb 2024 05:37:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10976"; a="909996006" X-IronPort-AV: E=Sophos;i="6.05,251,1701158400"; d="scan'208";a="909996006" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga002.fm.intel.com with ESMTP; 07 Feb 2024 05:37:18 -0800 Received: by black.fi.intel.com (Postfix, from userid 1001) id EBF194C4; Wed, 7 Feb 2024 11:21:52 +0200 (EET) Date: Wed, 7 Feb 2024 11:21:52 +0200 From: Mika Westerberg To: Linux regressions mailing list Cc: Olliver Schinagl , Andreas Noever , Michael Jamet , Yehezkel Bernat , linux-usb Subject: Re: kernel NULL pointer dereference on hotplug Message-ID: <20240207092152.GQ8454@black.fi.intel.com> References: <20240204064049.GD8454@black.fi.intel.com> <705fd33a-18af-44b2-b6ee-57e3169b7032@leemhuis.info> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Hi, On Wed, Feb 07, 2024 at 10:12:07AM +0100, Thorsten Leemhuis wrote: > On 07.02.24 07:13, Linux regression tracking (Thorsten Leemhuis) wrote: > > > > On 04.02.24 07:40, Mika Westerberg wrote: > >> On Fri, Feb 02, 2024 at 05:47:01PM +0100, Olliver Schinagl wrote: > >>> > >>> I noticed this nasty kernel NULL pointer dereference yesterday on > >>> 6.7.2-arch1-1 (haven't done this in a while) but also today, after updating > >>> to 6.7.3-arch1-1 it's still there, so dumping the panic here. Hopefully > >>> it'll be resolved by 6.7.4-arch1-1. > >> > >> Thanks for the report. > >> > >>> The thunderbolt gbit adapter always worked in the past, so this seems like a > >>> regression. Anyway, here's the log. > > FWIW, Leon Weiß (BCCed) just posted another NULL pointer deference issue > in 6.7 and found the culprit; for details see: > https://lore.kernel.org/all/38c253ea42072cc825dc969ac4e6b9b600371cc8.camel@ruhr-uni-bochum.de/ > > Sadly Leon's report lacks a backtrace we had in this thread ( > https://lore.kernel.org/all/c24c7882-6254-4e68-8f22-f3e8f65dc84f@schinagl.nl/ > ), so it might be something totally different. Leon's problem afaics > also happens on unplug while this one on hotplug. But well, I thought I > better quickly mention it here anyway so everyone is aware of it. Thanks for the information. As you mention, this seems to be unrelated. The one above is about DRM and graphics, the one Olliver reported is about Thunderbolt (okay there is Thunderbolt device involved in both but this one seems to be purely DP thing).