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=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 CBE80C2BB1D for ; Tue, 14 Apr 2020 19:26:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A6B7C20575 for ; Tue, 14 Apr 2020 19:26:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="fCX3Gwpi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2504707AbgDNT0t (ORCPT ); Tue, 14 Apr 2020 15:26:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2504699AbgDNT0m (ORCPT ); Tue, 14 Apr 2020 15:26:42 -0400 Received: from mail-pj1-x1044.google.com (mail-pj1-x1044.google.com [IPv6:2607:f8b0:4864:20::1044]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA23BC061A10 for ; Tue, 14 Apr 2020 12:26:41 -0700 (PDT) Received: by mail-pj1-x1044.google.com with SMTP id cl8so4537302pjb.3 for ; Tue, 14 Apr 2020 12:26:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=GBjwHY+AL72Y+T8vcTU277/7t2edTwQD/R5p6feAGn0=; b=fCX3GwpiQSEiUMKpeDVih8hj+JqhwWfdebHtVs0cADaQ3iHqoQ7ZmrmDaUY53dkJpl A5WKCCmkAXrtVjfKFav0oNXvfefO76hr8+DJHnKLwps4R4hNwEneswkOQtrClWDeGDxX HI76iHXV7Gq7giZsdnEvhsZlDb4bUvszNzGLGQw8t2wH8D0sLM3Tbaeu5pnLXlC+jJ5G lsJhRwjJ7W0ie2NbvW+TqoDhJP9fQ7Np/nbq4Qs+P++do5cNW85OgQOqekBnrGwNG/pZ otoSQnqDe1VOiwds65ZqPq0tD1m10m/YueHtixiFsAnRpjMZbrhriDQOU/V+F9gwo8DI y0NQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=GBjwHY+AL72Y+T8vcTU277/7t2edTwQD/R5p6feAGn0=; b=IY0ykfL6OBDswK+w3TTBEutFhT1VuZUtG8c/5EdxZAsMaidbGoz0SIrLm8xKDKaOyC eyPLguevSKHmzLAtF6mkYAeiKqXRytXhrFXSj5omWXvAvXbP+7x78s/pfGqys4P213yq dhSZ7HNzZsdHUvVY0POBOsJsyOh9rGJ/b8v1NRe+VnXOwu3zOdT1mQUOE/FNxSTm8N7p 3Wp3YtRmVe+kQl7Pa55W2ud46CxmHePX4fR2eempONwH9lY4C8euE4O9XtzcSJU3YWO/ +Lti/fXfClEFnuHZYCWk4VUgRCagkKgfZ/dinYxSfr4A0Qaz/HAxHwZHoFhe95+7LUxF ohpQ== X-Gm-Message-State: AGi0PuaMV+X4WtI9P8bMmD9DThogEBaZBCL3qx33rSPLhVSqAtWE9hoH CLovwBWQgUwX7btNmNvnvTjgyZP+7UvgYihEgQQ3iw== X-Google-Smtp-Source: APiQypKGMp4rdkYV/1cquaVsImLP3ZzjMppuoBalS0ljtPr38FSR8xLUWjRxwP0gMVd5Aii/eLsTsNG+UfBr1nF5MuY= X-Received: by 2002:a17:902:cb97:: with SMTP id d23mr1445679ply.232.1586892401135; Tue, 14 Apr 2020 12:26:41 -0700 (PDT) MIME-Version: 1.0 References: <20200410132706.170811b7@canb.auug.org.au> <27c212c4-b522-561d-411c-e74dc0ff0b74@infradead.org> <2b0f5d2e-3fe5-10c9-2a9a-9a0b341a52d5@infradead.org> In-Reply-To: From: Brendan Higgins Date: Tue, 14 Apr 2020 12:26:29 -0700 Message-ID: Subject: Re: linux-next: Tree for Apr 10 (lib/test_printf.ko) To: Randy Dunlap Cc: Naresh Kamboju , Linus Torvalds , Greg Kroah-Hartman , "Rafael J. Wysocki" , Stephen Rothwell , Linux Next Mailing List , Linux Kernel Mailing List , Rasmus Villemoes , Heikki Krogerus Content-Type: text/plain; charset="UTF-8" Sender: linux-next-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org 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. Also, I think I am going to send out a new test case for this that can live with the fwnode, software_node stuff. It would be nice if the printf test wasn't the only thing testing this stuff. Thanks!