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[2620:137:e000::1:20]) by mx.google.com with ESMTP id j8-20020a635948000000b003fccbc8a085si8350652pgm.782.2022.06.13.01.01.16; Mon, 13 Jun 2022 01:01:29 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b="jwz/9Uk3"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237211AbiFMHyX (ORCPT + 99 others); Mon, 13 Jun 2022 03:54:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235440AbiFMHyP (ORCPT ); Mon, 13 Jun 2022 03:54:15 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7B29101CE for ; Mon, 13 Jun 2022 00:54:13 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id v4so2437426plp.8 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=PRRJxpx3ugf4A71z2T2bV3I+y+K9Fg9e3Ob/Era/VXTNDeEVxILyfEBnL5PHNyT9B1 QXAWEnomhwN+k0ZVDbiaAzG9mMPYMdRtOpK7+7AzlSOg/sB/HIIJ6exq65DjAJdSfwfJ UgcZLAZ105CvvH1q060INCozDxScOyM+2xdBpqH9rUNQ/t52TXfDq7XOms061430DUWP U1rf0YY1KzGDc3b7055sbWHMqDFRFS9+Tr+d7bpdeyMXXro6KKSB2dH5TPhqPVik6mQg zJ+r8Y7gUKXZisb4batzfZQ6tiSTmG6qwmjsxy4XG5C2+v+kONZ25TxbDvwFW8731kXI Jk5w== X-Gm-Message-State: AOAM532NJsPfdMNznKr9SXgxIm+vTP4IDFezdVFKI/Y1t1EpLF++/z+I nYk51dIJ/zmVDJCIp0zzJGznfsH/P6zmsA== 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: X-Spam-Status: No, score=-3.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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.