linux-kernel - Re: [PATCH 07/22] memremap: move dev_pagemap callbacks into a separate structure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 13 Jun 2019 14:14:58 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Christoph Hellwig <hch@....de>,
        Dan Williams <dan.j.williams@...el.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Ben Skeggs <bskeggs@...hat.com>
Cc:     linux-nvdimm@...ts.01.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-mm@...ck.org, nouveau@...ts.freedesktop.org
Subject: Re: [PATCH 07/22] memremap: move dev_pagemap callbacks into a
 separate structure



On 2019-06-13 3:43 a.m., Christoph Hellwig wrote:
> The dev_pagemap is a growing too many callbacks.  Move them into a
> separate ops structure so that they are not duplicated for multiple
> instances, and an attacker can't easily overwrite them.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  drivers/dax/device.c              |  6 +++++-
>  drivers/nvdimm/pmem.c             | 18 +++++++++++++-----
>  drivers/pci/p2pdma.c              |  5 ++++-
>  include/linux/memremap.h          | 29 +++++++++++++++--------------
>  kernel/memremap.c                 | 12 ++++++------
>  mm/hmm.c                          |  8 ++++++--
>  tools/testing/nvdimm/test/iomap.c |  2 +-
>  7 files changed, 50 insertions(+), 30 deletions(-)

Looks good to me,

Reviewed-by: Logan Gunthorpe <logang@...tatee.com>

Logan