From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id BC7242119623F for ; Mon, 11 Jun 2018 14:58:11 -0700 (PDT) Date: Mon, 11 Jun 2018 14:58:09 -0700 From: Andrew Morton Subject: Re: [PATCH v11 3/7] mm: fix __gup_device_huge vs unmap Message-Id: <20180611145809.c05f215b9b2e7dab9e808304@linux-foundation.org> In-Reply-To: <152669370864.34337.13815113039455146564.stgit@dwillia2-desk3.amr.corp.intel.com> References: <152669369110.34337.14271778212195820353.stgit@dwillia2-desk3.amr.corp.intel.com> <152669370864.34337.13815113039455146564.stgit@dwillia2-desk3.amr.corp.intel.com> Mime-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: Dan Williams Cc: Jan Kara , linux-nvdimm@lists.01.org, david@fromorbit.com, stable@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, hch@lst.de List-ID: On Fri, 18 May 2018 18:35:08 -0700 Dan Williams wrote: > get_user_pages_fast() for device pages is missing the typical validation > that all page references have been taken while the mapping was valid. > Without this validation truncate operations can not reliably coordinate > against new page reference events like O_DIRECT. > > Cc: I'm not seeing anything in the changelog which justifies a -stable backport. ie: a description of the end-user-visible effects of the bug? _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm