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 4C031C433F5 for ; Thu, 3 Feb 2022 14:01:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350954AbiBCOBA (ORCPT ); Thu, 3 Feb 2022 09:01:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50698 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232957AbiBCOA7 (ORCPT ); Thu, 3 Feb 2022 09:00:59 -0500 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26999C061714 for ; Thu, 3 Feb 2022 06:00:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=CG7qhRTZqFuGbV5KI21kTvEgW0iKHq6T7r1QvRxD/2M=; b=eW+lm/XgE3echvTFXo9YykT+Jb aLS0JyHij9OJeRzd2cYEU3K5iuPvKXoD01Ye7n7tdf25z+hJk1M+ZPIb0fQ7YudqWZF+pOjfjuyjH J6bNvWp8r+NSkwsROi7U/vxuzahTka5HBgedkmhZUZlgdm9wifsNoHQTRfPMz3eMJXbLxVwegWMju jDa++Z8ubTXt52cFO1HVN/dyusGtGZTCXLnmcCk/63yci45VhbEMJLxv5cwFa58rZ0cOyESJbOHS7 wPiA//K8IkHtMeBzj1XXcr7pdX+c63F9B7GOnXu4zkZbmU1wrEE7p0njSGEt5u3QI9/jWB4Jaz9jk 083LxB9A==; Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nFcfD-001VeD-Nr; Thu, 03 Feb 2022 14:00:43 +0000 Date: Thu, 3 Feb 2022 06:00:43 -0800 From: Christoph Hellwig To: John Hubbard Cc: Andrew Morton , Peter Xu , Jason Gunthorpe , David Hildenbrand , Lukas Bulwahn , Jan Kara , Claudio Imbrenda , "Kirill A . Shutemov" , Alex Williamson , Andrea Arcangeli , LKML , linux-mm@kvack.org Subject: Re: [PATCH v3 1/4] mm: Fix invalid page pointer returned with FOLL_PIN gups Message-ID: References: <20220203093232.572380-1-jhubbard@nvidia.com> <20220203093232.572380-2-jhubbard@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220203093232.572380-2-jhubbard@nvidia.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 03, 2022 at 01:32:29AM -0800, John Hubbard wrote: > From: Peter Xu > > Alex reported invalid page pointer returned with pin_user_pages_remote() from > vfio after upstream commit 4b6c33b32296 ("vfio/type1: Prepare for batched > pinning with struct vfio_batch"). This problem breaks NVIDIA vfio mdev. There still isn't any nvidia vfio mdev driver in the tree, so this changelog stilldoesn't make sense.