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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27A3BC33CB6 for ; Thu, 16 Jan 2020 10:09:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E8CE0207FF for ; Thu, 16 Jan 2020 10:09:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579169370; bh=/lPEd1hvkxi7tQJuErw28/9BVJ750Vvq6gMKJni+Pu4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=tI354tjyrak2sKxxB1rcmX45MwtotTWfzsjZq+Qq2MARM0yIgDRvVtPlG7BGypik2 5oJR4PQ/fepwCG+cLBNJZd53oetRJ7xnl6vWyWlz/FOUu+anLSfPFFEf5r6avUOpIE zqRXRGceY9DCwEbpXsboPNIGamb0berI8wff6QyI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730562AbgAPKJ3 (ORCPT ); Thu, 16 Jan 2020 05:09:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:40082 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726230AbgAPKJ2 (ORCPT ); Thu, 16 Jan 2020 05:09:28 -0500 Received: from localhost (static-140-208-78-212.thenetworkfactory.nl [212.78.208.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8FFE9206B7; Thu, 16 Jan 2020 10:09:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579169368; bh=/lPEd1hvkxi7tQJuErw28/9BVJ750Vvq6gMKJni+Pu4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ox0yAvyAFyiTcF7TdtoXDSErZLw71AKR4SbaGp3NoEplXZv/2DQ4t/4CZuY4e2xrH XKpvgX8RMIEjHf/axYG4D1ClVNmMn24ptb/hQRXGe3VMdSsVZPhdmHzIPrUX9cCEat 6rV4a79QBulPu87G8i2X/9C6FG+T8kQtwS+F7ioM= Date: Thu, 16 Jan 2020 11:09:25 +0100 From: Greg KH To: Masami Ichikawa Cc: rostedt@goodmis.org, mingo@redhat.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] tracing: Do not set trace clock if tracefs lockdown is in effect Message-ID: <20200116100925.GA157179@kroah.com> References: <20200116094707.3846565-1-masami256@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200116094707.3846565-1-masami256@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 16, 2020 at 06:47:06PM +0900, Masami Ichikawa wrote: > When trace_clock option is not set and unstable clcok detected, > tracing_set_default_clock() sets trace_clock(ThinkPad A285 is one of > case). In that case, if lockdown is in effect, null pointer > dereference error happens in ring_buffer_set_clock(). > > Link: https://bugzilla.redhat.com/show_bug.cgi?id=1788488 > Signed-off-by: Masami Ichikawa > --- > kernel/trace/trace.c | 5 +++++ > 1 file changed, 5 insertions(+) This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly.