linux-kernel - Re: [PATCH 2/3] au1200fb: fix DMA API abuse

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:   Fri, 7 Jun 2019 14:14:42 +0200
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:     Manuel Lauss <manuel.lauss@...il.com>,
        Christoph Hellwig <hch@....de>
Cc:     Linux-MIPS <linux-mips@...r.kernel.org>,
        linux-fbdev <linux-fbdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] au1200fb: fix DMA API abuse


On 5/15/19 1:10 PM, Manuel Lauss wrote:
> Servus Christoph,
> 
> On Thu, May 9, 2019 at 7:39 PM Christoph Hellwig <hch@....de> wrote:
>> Virtual addresses return from dma(m)_alloc_attrs are opaque in what
>> backs then, and drivers must not poke into them.  Similarly caching
>> modes are not supposed to be directly set by the driver.  Switch the
>> driver to use the generic DMA API mmap helper to avoid these problems.
>>
>> Signed-off-by: Christoph Hellwig <hch@....de>
>> ---
>>  drivers/video/fbdev/au1200fb.c | 19 ++++---------------
>>  1 file changed, 4 insertions(+), 15 deletions(-)
> 
> Runs fine on my test system.
> 
> Tested-by: Manuel Lauss <manuel.lauss@...il.com>

Patch queued for v5.3, thanks.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics