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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20BF9C433EF for ; Thu, 3 Feb 2022 14:01:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8CA466B01A2; Thu, 3 Feb 2022 09:01:02 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 852E76B01A4; Thu, 3 Feb 2022 09:01:02 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6F35E8D0124; Thu, 3 Feb 2022 09:01:02 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0222.hostedemail.com [216.40.44.222]) by kanga.kvack.org (Postfix) with ESMTP id 5B2596B01A2 for ; Thu, 3 Feb 2022 09:01:02 -0500 (EST) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 15974181CA743 for ; Thu, 3 Feb 2022 14:01:02 +0000 (UTC) X-FDA: 79101629964.21.B5CC951 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf26.hostedemail.com (Postfix) with ESMTP id CA0CB140009 for ; Thu, 3 Feb 2022 14:01:00 +0000 (UTC) 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 X-Stat-Signature: 1qqxafj4ou5a5gd8z7kzqosqz38xf87q X-Rspam-User: nil Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b="eW+lm/Xg"; spf=none (imf26.hostedemail.com: domain of BATV+84c482d3de8be5be3bd0+6738+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+84c482d3de8be5be3bd0+6738+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: CA0CB140009 X-HE-Tag: 1643896860-7599 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: 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.