linux-kernel - Re: [PATCH 1/6] xen/gntdev: Fix dmabuf import with non-zero sgt offset

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Message-ID: <df1a02e7-e0e2-cbb1-3d30-9b17c44be6a6@epam.com>
Date:   Tue, 4 Aug 2020 06:34:10 +0000
From:   Oleksandr Andrushchenko <Oleksandr_Andrushchenko@...m.com>
To:     Jürgen Groß <jgross@...e.com>,
        Oleksandr Andrushchenko <andr2000@...il.com>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "boris.ostrovsky@...cle.com" <boris.ostrovsky@...cle.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>
CC:     "sstabellini@...nel.org" <sstabellini@...nel.org>,
        "dan.carpenter@...cle.com" <dan.carpenter@...cle.com>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>
Subject: Re: [PATCH 1/6] xen/gntdev: Fix dmabuf import with non-zero sgt
 offset


On 8/4/20 9:11 AM, Jürgen Groß wrote:
> On 31.07.20 14:51, Oleksandr Andrushchenko wrote:
>> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
>>
>> It is possible that the scatter-gather table during dmabuf import has
>> non-zero offset of the data, but user-space doesn't expect that.
>> Fix this by failing the import, so user-space doesn't access wrong data.
>>
>> Fixes: 37ccb44d0b00 ("xen/gntdev: Implement dma-buf import functionality")
>
> I can't find this commit in the tree. Did you mean bf8dc55b1358?
I'll double-check, thank you
>
> And don't you want to Cc stable for this patch, too?
Hm, yes, sounds reasonable
>
>>
>> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
>
> Acked-by: Juergen Gross <jgross@...e.com>
>
>
> Juergen