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 2A253FA3740 for ; Mon, 31 Oct 2022 09:48:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230126AbiJaJso (ORCPT ); Mon, 31 Oct 2022 05:48:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53578 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230104AbiJaJsm (ORCPT ); Mon, 31 Oct 2022 05:48:42 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D730FD57 for ; Mon, 31 Oct 2022 02:48:40 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 7394A60FA9 for ; Mon, 31 Oct 2022 09:48:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69F4AC433D6; Mon, 31 Oct 2022 09:48:39 +0000 (UTC) Date: Mon, 31 Oct 2022 05:48:37 -0400 From: Steven Rostedt To: Takashi Iwai Cc: regressions@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [REGRESSION 6.0.x / 6.1.x] NULL dereferencing at tracing Message-ID: <20221031054837.3a101e75@rorschach.local.home> In-Reply-To: <87h6zklb6n.wl-tiwai@suse.de> References: <87h6zklb6n.wl-tiwai@suse.de> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 31 Oct 2022 08:11:28 +0100 Takashi Iwai wrote: > Hi Steven, > > we've got a bug report indicating the NULL dereference at the recent > tracing changes, showing at the start of KDE. The details including > the dmesg are found at: > https://bugzilla.opensuse.org/show_bug.cgi?id=1204705 > > It was reported at first for 6.0.3, and confirmed that the problem > persists with 6.1-rc, too. > > The culprit seems to be the commit > f3ddb74ad0790030c9592229fb14d8c451f4e9a8 > tracing: Wake up ring buffer waiters on closing of the file > and reverting it seems fixing the problem. > > Could you take a look? > Thanks for the report, can you send me your .config. Thanks! -- Steve