From: Andrew Morton <akpm@linux-foundation.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-nvdimm@lists.01.org, stable@vger.kernel.org,
Jan Kara <jack@suse.cz>,
david@fromorbit.com, hch@lst.de, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH v11 3/7] mm: fix __gup_device_huge vs unmap
Date: Mon, 11 Jun 2018 14:58:09 -0700 [thread overview]
Message-ID: <20180611145809.c05f215b9b2e7dab9e808304@linux-foundation.org> (raw)
In-Reply-To: <152669370864.34337.13815113039455146564.stgit@dwillia2-desk3.amr.corp.intel.com>
On Fri, 18 May 2018 18:35:08 -0700 Dan Williams <dan.j.williams@intel.com> 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: <stable@vger.kernel.org>
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?
next prev parent reply other threads:[~2018-06-11 21:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-19 1:34 [PATCH v11 0/7] dax: fix dma vs truncate/hole-punch Dan Williams
2018-05-19 1:34 ` [PATCH v11 1/7] memremap: split devm_memremap_pages() and memremap() infrastructure Dan Williams
[not found] ` <152669369728.34337.5889133592233640241.stgit-p8uTFz9XbKj2zm6wflaqv1nYeNYlB/vhral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2018-05-22 6:24 ` Christoph Hellwig
2018-05-19 1:35 ` [PATCH v11 2/7] mm: introduce MEMORY_DEVICE_FS_DAX and CONFIG_DEV_PAGEMAP_OPS Dan Williams
2018-05-22 6:25 ` Christoph Hellwig
2018-05-19 1:35 ` [PATCH v11 3/7] mm: fix __gup_device_huge vs unmap Dan Williams
2018-06-11 21:58 ` Andrew Morton [this message]
2018-06-11 23:35 ` Dan Williams
2018-05-19 1:35 ` [PATCH v11 4/7] mm, fs, dax: handle layout changes to pinned dax mappings Dan Williams
2018-06-12 21:05 ` Ross Zwisler
2018-06-13 10:41 ` Jan Kara
2018-05-19 1:35 ` [PATCH v11 5/7] xfs: prepare xfs_break_layouts() to be called with XFS_MMAPLOCK_EXCL Dan Williams
2018-05-19 1:35 ` [PATCH v11 6/7] xfs: prepare xfs_break_layouts() for another layout type Dan Williams
2018-05-19 1:35 ` [PATCH v11 7/7] xfs, dax: introduce xfs_break_dax_layouts() Dan Williams
2018-05-22 6:27 ` Christoph Hellwig
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