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 4C200C433EF for ; Mon, 13 Jun 2022 07:54:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234392AbiFMHyR (ORCPT ); Mon, 13 Jun 2022 03:54:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233074AbiFMHyP (ORCPT ); Mon, 13 Jun 2022 03:54:15 -0400 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C94D0101E1 for ; Mon, 13 Jun 2022 00:54:13 -0700 (PDT) Received: by mail-pj1-x1036.google.com with SMTP id gc3-20020a17090b310300b001e33092c737so5191273pjb.3 for ; Mon, 13 Jun 2022 00:54:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=hpn8xKMupt7XEX09PSz3ZuublRBIDfWXnEUdq5eq7AQ=; b=jwz/9Uk3Ukruh/+3uCLAl0gN3fxTRTLdBUpi+YVjuDbuusyyV8T4wbhCc9VD5/SWKL sm0zDWivrhxKYz//Sr5nA7xCCh3B1MTPcaW+HstFWXokn/73hRaJweY2+O+Jm+k/pjRH LX60j1nsUXZyL7aHw9XFZhrjKpa/Mx4tsfgjg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=hpn8xKMupt7XEX09PSz3ZuublRBIDfWXnEUdq5eq7AQ=; b=myWVZzhGmDgOYmgAMjxlno3DVVrU29m8YPwngSHjnpIFv5iv0LYPbVqXdvyAaW0/e0 QZZrbvZJZHtFmHMtMGbNImVC5jx3vPAY3iVGsRmXAren6WlMFN4Gr4FFuDOotVJc1yMy wNuinS03UDNwu9nSCs3Qj9guQpsOAVtKOZVqpsi3rd1DjqZQeqNMXAbtuUUqC8u5J6BP TFn2CRgbipJ4A+USzacePyUa8ha9EVR7mBMKI8thWu02FLn4hzZQnADMNUkjT64tFnpY mhB1TWdVZdHPt8JvEVhByTL76Cn7G4KA6FucX7MDHrM7WKonTcRq+n7b0HoC/2Hf17uX geaw== X-Gm-Message-State: AOAM533ou090xrRIbmrBA4vBD9ORZettoueEE/sUPVqh5oST/r1nyf5Q ZBdjiuxJ4sVuj4zXHV3ivr3Ucg== X-Google-Smtp-Source: ABdhPJzw+r+KZp6HaFIa0h8yS/hJIq5Vjwc0cbEbPxqFKY3UeaK9n504TSuqOw+3dgCtnHVK0EF1Eg== X-Received: by 2002:a17:902:dac5:b0:164:13b2:4916 with SMTP id q5-20020a170902dac500b0016413b24916mr58042646plx.32.1655106853304; Mon, 13 Jun 2022 00:54:13 -0700 (PDT) Received: from google.com ([240f:75:7537:3187:de22:3777:8b31:5148]) by smtp.gmail.com with ESMTPSA id m12-20020a17090a414c00b001ea6a20d354sm4538957pjg.2.2022.06.13.00.54.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jun 2022 00:54:12 -0700 (PDT) Date: Mon, 13 Jun 2022 16:54:07 +0900 From: Sergey Senozhatsky To: Naresh Kamboju Cc: Sergey Senozhatsky , Minchan Kim , open list , linux-fsdevel@vger.kernel.org, Linux ARM , "open list:KERNEL SELFTEST FRAMEWORK" , linux-block , regressions@lists.linux.dev, Jens Axboe , Nitin Gupta Subject: Re: qemu-arm: zram: mkfs.ext4 : Unable to handle kernel NULL pointer dereference at virtual address 00000140 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Hello, On (22/06/12 20:56), Naresh Kamboju wrote: > > I have tested this patch and the reported issue got resolved [1]. > Many thanks for the tests. Quite honestly I was hoping that the patch would not help :) Well, ok, we now know that it's mapping area lock and the lockdep part of its memory is zero-ed out. The question is - "why?" It really should not be zeroed out. 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 37568C433EF for ; Mon, 13 Jun 2022 07:55:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=yrYiuqPLkmNrhLWYCxvVy/9qj6Iumi42B156u6RMAS8=; b=xXB0kGhf8vJncY oebItW0kbSBrC1ndiAAi2x1qRMu79WT636R5CdnG0kK2Kn0BASOXVzjN6CAnNjeOf1xoMLI0VtE0D iCFa26SST1ufzTvbRt1J+jAzduLmi43OITacRZrAOrIGxoq5aiE73FHTbTLkW2sZ1B39KTZYyVA/d r8ZGhP3uvODeOssQhGIN1Wn761GXca41KyTNDZFDNq4TrvHtph7Ao0yengaHzCp21yYzLfSGxHtMy oDtyFWNchMTu7ZFK9rUDbmdyV1UwmmyuxBCU3GYlhR9cMYLNTsHa+xryh0H6vDRKIA2iDYSNjP4Vp Mv3Jg3asb+EJC2K7gFLA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0ett-00249T-7e; Mon, 13 Jun 2022 07:54:17 +0000 Received: from mail-pj1-x1036.google.com ([2607:f8b0:4864:20::1036]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0etq-00248J-6L for linux-arm-kernel@lists.infradead.org; Mon, 13 Jun 2022 07:54:15 +0000 Received: by mail-pj1-x1036.google.com with SMTP id k5-20020a17090a404500b001e8875e6242so5179966pjg.5 for ; Mon, 13 Jun 2022 00:54:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=hpn8xKMupt7XEX09PSz3ZuublRBIDfWXnEUdq5eq7AQ=; b=jwz/9Uk3Ukruh/+3uCLAl0gN3fxTRTLdBUpi+YVjuDbuusyyV8T4wbhCc9VD5/SWKL sm0zDWivrhxKYz//Sr5nA7xCCh3B1MTPcaW+HstFWXokn/73hRaJweY2+O+Jm+k/pjRH LX60j1nsUXZyL7aHw9XFZhrjKpa/Mx4tsfgjg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=hpn8xKMupt7XEX09PSz3ZuublRBIDfWXnEUdq5eq7AQ=; b=m53uTL20tjkA5SYVp46rCs81Nezw7JDEJhHV9zVMdqfNPT4hKMncZxToA5FRDvfWwJ IUQ/dAVX1ZMvSizRRK37nLtIzxL8L4xZvxxD5u78WB5Yb2RtARrJSk2PrDpmQkVsvUJj CNSQcqmV04i2zlZQnsuzpPJ0AcpjqjwxpLLDieZhE07uSua4f1Mfw6AHh8ZbyGcPJPqb LKe04mM6mm4pSMmcbwLvKpQqXMNIGCrBrHzV29rFJk35B9BgwyIgdRznw3OyYptYdd2T X69xIDgo255YTHGpF36ZGjdocQ8T+irkAVWXQcZ5HU113Z445ifzruA/QWoVD+mkN+KS paJw== X-Gm-Message-State: AOAM532+QPbR0frPAboX5pR9sz7M7/PvSo7xELsssXZ2h71b/m6HmCkk 2OKjRGqqyFFnyWLTVdjT591bkA== X-Google-Smtp-Source: ABdhPJzw+r+KZp6HaFIa0h8yS/hJIq5Vjwc0cbEbPxqFKY3UeaK9n504TSuqOw+3dgCtnHVK0EF1Eg== X-Received: by 2002:a17:902:dac5:b0:164:13b2:4916 with SMTP id q5-20020a170902dac500b0016413b24916mr58042646plx.32.1655106853304; Mon, 13 Jun 2022 00:54:13 -0700 (PDT) Received: from google.com ([240f:75:7537:3187:de22:3777:8b31:5148]) by smtp.gmail.com with ESMTPSA id m12-20020a17090a414c00b001ea6a20d354sm4538957pjg.2.2022.06.13.00.54.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jun 2022 00:54:12 -0700 (PDT) Date: Mon, 13 Jun 2022 16:54:07 +0900 From: Sergey Senozhatsky To: Naresh Kamboju Cc: Sergey Senozhatsky , Minchan Kim , open list , linux-fsdevel@vger.kernel.org, Linux ARM , "open list:KERNEL SELFTEST FRAMEWORK" , linux-block , regressions@lists.linux.dev, Jens Axboe , Nitin Gupta Subject: Re: qemu-arm: zram: mkfs.ext4 : Unable to handle kernel NULL pointer dereference at virtual address 00000140 Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220613_005414_304992_E735ABB1 X-CRM114-Status: GOOD ( 11.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello, On (22/06/12 20:56), Naresh Kamboju wrote: > > I have tested this patch and the reported issue got resolved [1]. > Many thanks for the tests. Quite honestly I was hoping that the patch would not help :) Well, ok, we now know that it's mapping area lock and the lockdep part of its memory is zero-ed out. The question is - "why?" It really should not be zeroed out. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel