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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89A6CC43381 for ; Tue, 26 Feb 2019 12:57:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 51E6D2087C for ; Tue, 26 Feb 2019 12:57:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=szeredi.hu header.i=@szeredi.hu header.b="Hd3UdY1L" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726507AbfBZM5m (ORCPT ); Tue, 26 Feb 2019 07:57:42 -0500 Received: from mail-io1-f52.google.com ([209.85.166.52]:35441 "EHLO mail-io1-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725954AbfBZM5m (ORCPT ); Tue, 26 Feb 2019 07:57:42 -0500 Received: by mail-io1-f52.google.com with SMTP id x4so10407034ion.2 for ; Tue, 26 Feb 2019 04:57:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=szeredi.hu; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=0AMjjrvOkyAHBBgYhlC2ktWgvJKv7Fw4FyA0OONQT90=; b=Hd3UdY1L5y0i4pfUyiUQgTyVlILKBbcVbfABa/fzxgYasntNcWI5cyAOnFpD/0Yq/O ONBJW4GmdwIEwv9KM32YjC+n283grDKnRp8fstmTNwc4PYP2t2doX/+7fGAOvzLl4wLX SV4/vZ/KMlFXrUdU6wKb+/0ANA1zVZEixoGn0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=0AMjjrvOkyAHBBgYhlC2ktWgvJKv7Fw4FyA0OONQT90=; b=GqG+YCmVad7psv1n/uKF3xIXksTcG5Mswoop/XtfjQO7nFDNMxrmX0bLPA17y9WqB3 AeJfBBKs9Wrcm8yPz5f8smvyJexUpTumhbIy1EWmI3J3VFKfFE1XiNOXrjf/qdTh3Rna exYMbfzzjhuZAeeUlmhpUSVvQNnqMt/vZU8tFa2Ct7Dzzzk08JWn041/M5+61xlA6gjh 6DOmSqwim6Lkn+OV+HnamYZFYPvlGAm/CwoQ5RSqmrorBOUWpZpxBvn/CWfDf1LAmf/z 5Ys74whiZOF7ainTN8ed6DsZlcum+zVFblMqNw1jrecaZMQXi4MlR6FX/WVAj9SkEJFt KSfQ== X-Gm-Message-State: AHQUAuZr8EcICz07wRgRk6A985/07W1eo4erw6BKlrOcvpZ/tSDz43Th WK08s/ckEZ8xcGgbj87nAiXrbXDXJlDGToU9mEO6kw== X-Google-Smtp-Source: AHgI3IbQZr6vxOGQpDRIrTyYIpqD7TsNtT8urnbF1SWN6od/oS/hqMf1FW7YISawdzqkIq9jUrS2j9nbPlzC6aZAPns= X-Received: by 2002:a5d:8248:: with SMTP id n8mr12307566ioo.246.1551185861453; Tue, 26 Feb 2019 04:57:41 -0800 (PST) MIME-Version: 1.0 References: <87o998m0a7.fsf@vostro.rath.org> <87ef9omb5f.fsf@vostro.rath.org> <87ef9nighv.fsf@thinkpad.rath.org> <87zhs7fbkg.fsf@thinkpad.rath.org> <8736ovcn9q.fsf@vostro.rath.org> <877ee4vgr4.fsf@vostro.rath.org> <878sy3h7gr.fsf@vostro.rath.org> In-Reply-To: <878sy3h7gr.fsf@vostro.rath.org> From: Miklos Szeredi Date: Tue, 26 Feb 2019 13:57:30 +0100 Message-ID: Subject: Re: [fuse-devel] fuse: trying to steal weird page To: fuse-devel Cc: linux-fsdevel Content-Type: multipart/mixed; boundary="00000000000040f3020582cb9ad9" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org --00000000000040f3020582cb9ad9 Content-Type: text/plain; charset="UTF-8" On Mon, Feb 25, 2019 at 10:41 PM Nikolaus Rath wrote: > > On Feb 12 2019, Nikolaus Rath wrote: > > On Feb 12 2019, Miklos Szeredi wrote: > >> On Sun, Feb 10, 2019 at 11:05 PM Nikolaus Rath wrote: > >> > >>> Bad news. I can now reliably reproduce the issue again. > >> > >> A reliable reproducer is always good news. Are the messages exactly > >> the same as last time (value of flags, etc)? > > > > The flags, count, mapcount and mapping values are always the same. The > > page and index is varying. So the general format is: > > > > [ 2562.773181] fuse: trying to steal weird page > > [ 2562.773187] page= index= > > flags=17ffffc00000ad, count=1, mapcount=0, mapping= (null) > > Is there anything else I can do to help debugging this? Could you please try the attached patch? Thanks, Miklos --00000000000040f3020582cb9ad9 Content-Type: text/x-patch; charset="US-ASCII"; name="test.patch" Content-Disposition: attachment; filename="test.patch" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_jslrz5rh0 ZGlmZiAtLWdpdCBhL2ZzL3NwbGljZS5jIGIvZnMvc3BsaWNlLmMKaW5kZXggZGUyZWRlMDQ4NDcz Li4wN2M1Yzc3YWJjNDUgMTAwNjQ0Ci0tLSBhL2ZzL3NwbGljZS5jCisrKyBiL2ZzL3NwbGljZS5j CkBAIC03Myw3ICs3Myw3IEBAIHN0YXRpYyBpbnQgcGFnZV9jYWNoZV9waXBlX2J1Zl9zdGVhbChz dHJ1Y3QgcGlwZV9pbm9kZV9pbmZvICpwaXBlLAogCQkgKiBJZiB3ZSBzdWNjZWVkZWQgaW4gcmVt b3ZpbmcgdGhlIG1hcHBpbmcsIHNldCBMUlUgZmxhZwogCQkgKiBhbmQgcmV0dXJuIGdvb2QuCiAJ CSAqLwotCQlpZiAocmVtb3ZlX21hcHBpbmcobWFwcGluZywgcGFnZSkpIHsKKwkJaWYgKHJlbW92 ZV9tYXBwaW5nKG1hcHBpbmcsIHBhZ2UpICYmIHBhZ2VfY291bnQocGFnZSkgPT0gMSkgewogCQkJ YnVmLT5mbGFncyB8PSBQSVBFX0JVRl9GTEFHX0xSVTsKIAkJCXJldHVybiAwOwogCQl9Cg== --00000000000040f3020582cb9ad9--