From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) (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 CB1481EE7DC; Wed, 3 Sep 2025 15:31:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756913486; cv=none; b=bJcXEpmLwTuyRPcAysly0O9Qw1D/5rQF/rsgRZeQxBhKnZrnLMh0HvgoC+cJ7PaeiCT/kKbhD17VEmpBj/1uocgMSq4zSRUiis2xraVTt0TD2qTExs/SrxUcD8dYIqMkVZmvPEkBXZtHAhCsTUng3jlhj7KYAoN12RFQFAwFmig= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756913486; c=relaxed/simple; bh=Wu9M4YpIKT+vGWddhMj9PXdeaRh/syWvK69GFmoctuo=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=qgaB2D0rDsxdWtSFLmntOLtz5N3YJ6rROTD544fm0D3+HICn5lyF+aqlpIOYi4N9DNhS8ZEAQ+ZL6r6IVcqyXEydVr5ZeSR9+4uOXHvmjTK5tQjq2ySxTbwidWiCK4vZUd9Xb0SoZFLtapzh82hYesyEQBEHT/c1nfi/JDMswnw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 69DFC5B205; Wed, 3 Sep 2025 15:31:15 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf12.hostedemail.com (Postfix) with ESMTPA id A4ED117; Wed, 3 Sep 2025 15:31:13 +0000 (UTC) Date: Wed, 3 Sep 2025 11:31:12 -0400 From: Steven Rostedt To: "Paul E. McKenney" Cc: Oliver Sang , oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, Mathieu Desnoyers , Sebastian Andrzej Siewior , linux-trace-kernel@vger.kernel.org Subject: Re: [paulmck-rcu:dev.2025.08.13a] [tracing] 364ac25d46: WARNING:at_arch/x86/mm/fault.c:#do_user_addr_fault Message-ID: <20250903113112.247eb552@batman.local.home> In-Reply-To: References: <202508211038.c93e8603-lkp@intel.com> <68044ea3-32c1-4d72-9bd3-fe2031669d79@paulmck-laptop> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: A4ED117 X-Stat-Signature: edbpmh7koa7ihpbptfnajxtn1rh8sapm X-Rspamd-Server: rspamout06 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX18EpQL1l5ccl6ZK1yYxI4zY1u2/ZlT1vhE= X-HE-Tag: 1756913473-414272 X-HE-Meta: U2FsdGVkX1+sSmI5A0f6i9mqzMWM+Dm1/Masy+yO8gz8iVvjkrw2zRAu9Ff2bL+0QtlTpjLz3BoQzdPuCAqOyr/Iao7vrlkpV/xOPsEXzfivQSUksb7+Wm+p7JJxnxqMl5uVwDHvHViYJiF2DMqo2g7/m6oOiAbYiVmIIijrEPqIL2p6x4gKRrbdMuOfjMDNtI25TtkYrRwc9iYJffVAsHKCmrQ9Iy+qkjRmivQOTcQ2K5I2ThMRS1G+9Pkg5HL9GVgeWQ081zGQX/kJ6JqamWEglNfsMPOoiWwStzeBnButUxuaB0GaV8kuu9NLQ2LCkDLE3kJznZkKwgWGcpgUbYsmq2QcGhfjRSLPV4l4LyaeikUEDfoWSA== On Wed, 3 Sep 2025 03:31:31 -0700 "Paul E. McKenney" wrote: > > by applying the patch, the issue gone. but since you said this is a 'diagnostic > > patch', not sure if it's a real fix. anyway: > > > > Tested-by: kernel test robot > > Thank you very much! This tells me that something on the code path from > the tracepoint to the BPF program needs to have preemption disabled. > I will leave the diagnostic patch in my tree, and will be looking into > what the real fix should be. Was it a BPF program that triggered this? I couldn't get that from the backtrace. Also, is this only a x86 32bit issue? -- Steve