Received: by 2002:a25:8b91:0:0:0:0:0 with SMTP id j17csp2404536ybl; Thu, 19 Dec 2019 13:04:39 -0800 (PST) X-Google-Smtp-Source: APXvYqxbS+k6kqQPTRhSXjctqmsI+qgS8qDFZGJ4zSJLPjfffQ/9vNiIP6LyPpKFbZGx5U15iRSy X-Received: by 2002:a9d:ea6:: with SMTP id 35mr10539362otj.106.1576789478836; Thu, 19 Dec 2019 13:04:38 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1576789478; cv=none; d=google.com; s=arc-20160816; b=JQ8QYjoaUire71HwHSpAJsnvFbosUR6sWHRCLxADZgmPFTS0Gp7QR7Mp3JyoUCBorY ft977YJGno0pXDh5EyA+Y4k8UrJv89BR0g7kpMlvCqGPi1xKrg0A+tbSNYrQmokCBhXx 6JtymHnuW+2FEq18hHRVHRGsabvE7PI/oCC/Ke2tN/2Cfyn4bAmHpQukOvPg7ThH23BI zQtPJfNbQW/fvXb6El+PKDYU4pBdx7PasoNE5Lr9ITvy+qUgFnRIiPUiDc/WPD++q/Dv K7WhUPNM0r02Gx8YjlFjwPXkFT0NtH4hEVPee1GgPjL6r4AJ4nrDDio28cBtOFqmPokS koNw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:message-id:date:references :in-reply-to:subject:cc:to:from; bh=QAGn33yEXsMEhZ5sWgZ+GAkmmBZLDgsqAOPtL2jvNYE=; b=F/GJAf+CdfwijvxHCDMDGCjqGh/DVwVakiGG3JUN+WthbiEUYNZDbj1vPUkAAiAd8p pFOfZ4sxAjVEW9FM3o8t1lXSvxvUjqWYlyGIw3cRQ0WRxJeugU/nWZD2xm1BIitoORla PvJ6NxZYYBdA44VM+9M3dKd5DSiRo5Mhon83pp13Of6IHwf1pFAEny8Ii3TmKKXwtOyi UE6fIkbN1rubLg3E4cAOqaFPqU9aZrPoliylVZhZZaDskTjvKftMOvaRGDYeU7iwtW8k UHJM1CPqDF4YQDa9dxe/c1Vv09twbvpH2tsMZR4jIB9qYY9J/R3HPOrN14rVmbNZQr/C E6kw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id u8si3920200otq.262.2019.12.19.13.04.26; Thu, 19 Dec 2019 13:04:38 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727255AbfLSVCg (ORCPT + 99 others); Thu, 19 Dec 2019 16:02:36 -0500 Received: from logand.com ([37.48.87.44]:59300 "EHLO logand.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726959AbfLSVCf (ORCPT ); Thu, 19 Dec 2019 16:02:35 -0500 Received: by logand.com (Postfix, from userid 1001) id 329DF1A8885; Thu, 19 Dec 2019 22:02:34 +0100 (CET) X-Mailer: emacs 26.3 (via feedmail 11-beta-1 I) From: Tomas Hlavaty To: Ryusuke Konishi Cc: linux-nilfs , LKML Subject: Re: BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 in nilfs_segctor_do_construct In-Reply-To: References: <8736emquds.fsf@logand.com> Date: Thu, 19 Dec 2019 22:02:32 +0100 Message-ID: <87immckp07.fsf@logand.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Ryusuke, thanks for your answer. Ryusuke Konishi writes: > 1) Is the crash reproducible in the environment ? yes > 2) Can you mount the corrupted(?) partition from a recent version of > kernel ? > 3) Does read-only mount option (-r) work to avoid the crash ? I'll have access to the computer sometime next week so I'll try this out and let you know. Thank you, Tomas