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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 57054C38A2C for ; Wed, 15 Apr 2020 19:06:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 316EF20787 for ; Wed, 15 Apr 2020 19:06:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407757AbgDOTGu (ORCPT ); Wed, 15 Apr 2020 15:06:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:46638 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1416884AbgDOSzy (ORCPT ); Wed, 15 Apr 2020 14:55:54 -0400 Received: from home.goodmis.org (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (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 0196020732; Wed, 15 Apr 2020 18:55:52 +0000 (UTC) Date: Wed, 15 Apr 2020 14:55:45 -0400 From: Steven Rostedt To: Brendan Higgins Cc: Randy Dunlap , Naresh Kamboju , Linus Torvalds , Greg Kroah-Hartman , "Rafael J. Wysocki" , Stephen Rothwell , Linux Next Mailing List , Linux Kernel Mailing List , Rasmus Villemoes , Heikki Krogerus Subject: Re: linux-next: Tree for Apr 10 (lib/test_printf.ko) Message-ID: <20200415185545.GA1632@home.goodmis.org> References: <20200410132706.170811b7@canb.auug.org.au> <27c212c4-b522-561d-411c-e74dc0ff0b74@infradead.org> <2b0f5d2e-3fe5-10c9-2a9a-9a0b341a52d5@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-next-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org On Tue, Apr 14, 2020 at 12:26:29PM -0700, Brendan Higgins wrote: > On Sat, Apr 11, 2020 at 11:22 PM Randy Dunlap wrote: > > > > On 4/11/20 10:36 PM, Naresh Kamboju wrote: > > > FYI, > > > > > > Is this problem related to, > > > > > > Regression reported on Linux next 5.6.0-rc4-next-20200305 on x86_64, > > > i386, arm and arm64. The steps to reproduce is running kselftests lib > > > printf.sh test case. > > > Which is doing modprobe operations. > > > > > > BUG: kernel NULL pointer dereference, address: 00 - ida_free+0x76/0x140 > > > > > > https://lore.kernel.org/linux-kselftest/CAFd5g46Bwd8HS9-xjHLh_rB59Nfw8iAnM6aFe0QPcveewDUT6g@mail.gmail.com/T/ > > > > > > > Looks similar. Lots of fwnode, software_node, ida stuff there. > > Sorry for the late reply, I was out. > > Yeah, I am pretty sure it is the same. Heikki proposed a fix that I am > going to try. My test suite just tripped over this bug. Is this the patch that you think fixes it? https://lore.kernel.org/linux-kselftest/20200414081513.GD2828150@kuha.fi.intel.com I'll add it to see if I can continue my testing. -- Steve