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[195.135.220.15]) by mx.google.com with ESMTPS id j3si4542613eja.2.2019.04.02.03.16.14 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Apr 2019 03:16:14 -0700 (PDT) Received-SPF: pass (google.com: domain of jack@suse.cz designates 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=pass (google.com: domain of jack@suse.cz designates 195.135.220.15 as permitted sender) smtp.mailfrom=jack@suse.cz X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id A291FAC4A; Tue, 2 Apr 2019 10:16:13 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id 7179D1E42C7; Tue, 2 Apr 2019 12:16:13 +0200 (CEST) Date: Tue, 2 Apr 2019 12:16:13 +0200 From: Jan Kara To: bugzilla-daemon@bugzilla.kernel.org Cc: linux-ext4@vger.kernel.org, linux-mm@kvack.org Subject: Re: [Bug 203107] New: Bad page map in process during boot Message-ID: <20190402101613.GF12133@quack2.suse.cz> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Switching to email... On Fri 29-03-19 20:46:22, bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=203107 > > Bug ID: 203107 > Summary: Bad page map in process during boot > Product: File System > Version: 2.5 > Kernel Version: 5.0.5 > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: ext4 > Assignee: fs_ext4@kernel-bugs.osdl.org > Reporter: echto1@gmail.com > Regression: No > > Error occurs randomly at boot after upgrading kernel from 5.0.0 to 5.0.4. > > https://justpaste.it/387uf I don't think this is an ext4 error. Sure this is an error in file mapping of libblkid.so.1.1.0 (which is handled by ext4) but the filesystem has very little to say wrt how or which PTEs are installed. And the problem is that invalid PTE (dead000000000100) is present in page tables. So this looks more like a problem in MM itself. Adding MM guys to CC. Honza -- Jan Kara SUSE Labs, CR