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 DF290C4332F for ; Sun, 29 Oct 2023 13:50:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230113AbjJ2Num (ORCPT ); Sun, 29 Oct 2023 09:50:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229529AbjJ2Nul (ORCPT ); Sun, 29 Oct 2023 09:50:41 -0400 Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E28ACBF for ; Sun, 29 Oct 2023 06:50:38 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPSA id E3E9A1C0002; Sun, 29 Oct 2023 13:50:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1698587437; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=a8GUOXz37gmy7V60xc0vXGGHZfnk3OdOvT79FlC7134=; b=mfONVS8KKgVpPDsG2UxTeARpH67UWrtTtpDs9R51IzEyfokr5ZYmAuLqDkavfv4X8e/5nz wOaBH1is4G/xKU0EFcN3IZmotkkPcfA0eSqBotus/a3cuqKBE1JbbXED3coiE4erZIUfQN uRP/IQcWCJxAGLAfpM9QZuv+sLSrA5NroZidmVrRGcU7eoRIsfFQJqV/m1lYU4gRAw8duG wu5UDvLEmLIZCORJUARuXrj7VV0iQ2Yx5w8HAZs1tLJQAZ7D0DcklrSTPlkqnvCzdnL04M ClCKzxNTC6eoXADbGVKEjE5vI9GF+iZtbir6EDd2uUT6Ya3Tzo5tfHowWzRMNw== Date: Sun, 29 Oct 2023 14:50:33 +0100 From: Miquel Raynal To: Richard Weinberger Cc: ZhaoLong Wang , Vignesh Raghavendra , Artem Bityutskiy , dpervushin , linux-mtd , linux-kernel , chengzhihao1 , yi zhang , yangerkun Subject: Re: [PATCH v3] mtd: Fix gluebi NULL pointer dereference caused by ftl notifier Message-ID: <20231029145033.0ad2682a@xps-13> In-Reply-To: <174426702.13324.1698438610904.JavaMail.zimbra@nod.at> References: <20231027012033.50280-1-wangzhaolong1@huawei.com> <20231027194026.1bc32dfe@xps-13> <174426702.13324.1698438610904.JavaMail.zimbra@nod.at> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-GND-Sasl: miquel.raynal@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Richard, richard@nod.at wrote on Fri, 27 Oct 2023 22:30:10 +0200 (CEST): > ----- Urspr=C3=BCngliche Mail ----- > > Von: "Miquel Raynal" =20 > >> Detailed reproduction information available at the link[1], > >>=20 > >> The solution for the gluebi module is to run jffs2 on the UBI > >> volume without considering working with ftl or mtdblock.[2]. =20 > >=20 > > I am sorry but ftl, gluebi, mtdblock, jffs2 and ubi in the same report > > seem a little bit fuzzy. Are you sure about this sentence? =20 >=20 > ZhaoLong Wang found an interesting bug while stacking various MTD compone= nts. > I suggested to just deny mtdblock on top of gluebi to avoid the whole > problem class instead of adding more duct tape. Ack. I'll queue this once the log fixed and your official Ack-by received for mtd/next after -rc1 is out. Thanks, Miqu=C3=A8l >=20 > Thanks, > //richard >=20 > The issue reminds me of one of my favorite Monty Python sketches, https:/= /www.youtube.com/watch?v=3DLFrdqQZ8FFc > ;-) :-)