From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C096C4708E for ; Wed, 4 Jan 2023 12:35:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239162AbjADMfF (ORCPT ); Wed, 4 Jan 2023 07:35:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239159AbjADMfE (ORCPT ); Wed, 4 Jan 2023 07:35:04 -0500 Received: from wout5-smtp.messagingengine.com (wout5-smtp.messagingengine.com [64.147.123.21]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8EA481ADBE; Wed, 4 Jan 2023 04:35:02 -0800 (PST) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.west.internal (Postfix) with ESMTP id 2D87E320085B; Wed, 4 Jan 2023 07:35:01 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Wed, 04 Jan 2023 07:35:01 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kroah.com; h=cc :cc:content-type:date:date:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:sender:subject :subject:to:to; s=fm2; t=1672835700; x=1672922100; bh=SXc8ZEz6U0 GgUuXK0HIz/oLBUfR7nGW8kjeVugLNhI8=; b=Z/gfOocRZfcLHAl+DE4ckNpyXI 4YDdLIMC6ZR3wDhHfOw7wO0W/7peHo0r1G7ddWkbAPETKhrm7wBA+e7JEjZ3+jbv TYYv9Q8MyXlJqH3aD0FruT/c2MO7WnYwkqsVt39fWIAAmObOo0YVL0z9reM9bxKG LLwbb7BLaNJ/HjPcp05QSmhywp1qtMCoiSzP44vaOemLpXcaTjJy0tThHImSfXv7 l2NTFZdQ7ARkI6ktuzGljBY8tr/4ojaybIkwNEog7M7rv5FYj7JlErWzI00kt84w W4Sk+CA1GLPE0ow2xQ1NjhqQ0YtnED7QBXDzo8Q0S+zVB2/6paHQ+6Agc38g== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:date:date:feedback-id :feedback-id:from:from:in-reply-to:in-reply-to:message-id :mime-version:references:reply-to:sender:subject:subject:to:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm2; t=1672835700; x=1672922100; bh=SXc8ZEz6U0GgUuXK0HIz/oLBUfR7 nGW8kjeVugLNhI8=; b=Tsig7tRMgL15ZlPnAolQR4cur7tNuKaIPFYTnTLKMQYm tfQLPOMG6Jock/+eoK48CmpxNrIZlzxPqKJW6jdDHnlszB/PCmIUWmRgQ3fo1gZt m1iLFnV7MNAQwDHvebL4KbltcDeB8078NQXdn1E4kTNjV035TGr/PQoCVhk3w5zJ yLAdrpMzygVvoamUNaLzfKZ9lvoZ2RlsMMXKSpASWP2vTd4Kgs3ArKRunNDq4V5X uQ37LpNS2zKouuXB2jiHXqc+dqhzquex+cSEf/3gUHP/JtepLlfqgqJglJzxAuZQ gnrbaQRR0ZOQxVlgsI1M189PrKk2XabBCI36RPbElA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrjeeigdegudcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpeffhffvvefukfhfgggtuggjsehttdertddttddvnecuhfhrohhmpefirhgvghcu mffjuceoghhrvghgsehkrhhorghhrdgtohhmqeenucggtffrrghtthgvrhhnpeejgfekff ekhedtteetudefgfelueegudfglefhffeileeugfeijeehvedttdfhffenucffohhmrghi nhepjhhovghlfhgvrhhnrghnuggvshdrohhrghdphhgrshhtvggsihhnrdgtohhmnecuve hluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepghhrvghgsehk rhhorghhrdgtohhm X-ME-Proxy: Feedback-ID: i787e41f1:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 4 Jan 2023 07:34:59 -0500 (EST) Date: Wed, 4 Jan 2023 13:34:52 +0100 From: Greg KH To: Joel Fernandes Cc: stable@vger.kernel.org, paulmck@kernel.org, rcu@vger.kernel.org Subject: Re: Please apply to v5.15 stable: 96017bf90397 ("rcu-tasks: Simplify trc_read_check_handler() atomic operations") Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Wed, Dec 28, 2022 at 04:30:30AM +0000, Joel Fernandes wrote: > On Wed, Dec 28, 2022 at 1:47 AM Joel Fernandes wrote: > > > > Hello, > > > > Please apply 96017bf90397 ("rcu-tasks: Simplify trc_read_check_handler() > > atomic operations") to the stable v5.15 stable kernel. It made it in v5.16. > > > > I confirmed the patch fixes the following splat which happens twice on TRACE02: > > > > [ 765.941351] WARNING: CPU: 0 PID: 80 at kernel/rcu/tasks.h:895 trc_read_check_handler+0x61/0xe0 > > [ 765.949880] Modules linked in: > > [ 765.953006] CPU: 0 PID: 80 Comm: rcu_torture_rea Not tainted 5.15.86-rc1+ #25 > > [ 765.959982] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 > > [ 765.967964] RIP: 0010:trc_read_check_handler+0x61/0xe0 > > [ 765.973050] Code: 01 00 89 c0 48 03 2c c5 80 f8 a5 ae c6 45 00 00 [..] > > [ 765.991768] RSP: 0000:ffffa64ac0003fb0 EFLAGS: 00010047 > > [ 765.997042] RAX: ffffffffad4f8610 RBX: ffffa26b41bd3000 RCX: ffffa26b5f4ac8c0 > > [ 766.004418] RDX: 0000000000000000 RSI: ffffffffae978121 RDI: ffffa26b41bd3000 > > [ 766.011502] RBP: ffffa26b41bd6000 R08: ffffa26b41bd3000 R09: 0000000000000000 > > [ 766.018778] R10: 0000000000000000 R11: ffffa64ac0003ff8 R12: 0000000000000000 > > [ 766.025943] R13: ffffa26b5f4ac8c0 R14: 0000000000000000 R15: 0000000000000000 > > [ 766.034383] FS: 0000000000000000(0000) GS:ffffa26b5f400000(0000) knlGS:0000000000000000 > > [ 766.042925] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [ 766.048775] CR2: 0000000000000000 CR3: 0000000001924000 CR4: 00000000000006f0 > > [ 766.055991] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > [ 766.063135] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > [ 766.070711] Call Trace: > > [ 766.073515] > > [ 766.075807] flush_smp_call_function_queue+0xec/0x1a0 > > [ 766.081087] __sysvec_call_function_single+0x3e/0x1d0 > > [ 766.086466] sysvec_call_function_single+0x89/0xc0 > > [ 766.091431] > > [ 766.093713] > > [ 766.095930] asm_sysvec_call_function_single+0x16/0x20 > > > > Full kernel logs: > > http://box.joelfernandes.org:9080/job/rcutorture_stable/job/Linux%20Stable%20RC%205.15/lastFailedBuild/artifact/tools/testing/selftests/rcutorture/res/2022.12.27-20.43.34/TRACE02/console.log > > Updated link to full kernel log: https://hastebin.com/raw/uvoholebol Now queued up, thanks. greg k-h