linux-kernel - Re: [PATCH 2/2] media: omap3isp change to devm for resources

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Date:   Fri, 16 Dec 2016 00:33:11 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Shuah Khan <shuahkh@....samsung.com>
Cc:     sakari.ailus@...ux.intel.com, mchehab@...nel.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] media: omap3isp change to devm for resources

Hi Shuah,

Thank you for the patch.

Sakari has submitted a similar patch as part of his kref series. Please use it 
as a base point and rework it if you want to get it merged separately. I've 
reviewed the patch and left quite a few comments that need to be addressed.

On Thursday 15 Dec 2016 12:40:08 Shuah Khan wrote:
> Using devm resources that have external dependencies such as a dev
> for a file handler could result in devm resources getting released
> durin unbind while an application has the file open holding pointer
> to the devm resource. This results in use-after-free errors when the
> application exits.
> 
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> ---
>  drivers/media/platform/omap3isp/isp.c         | 71 ++++++++++++++++--------
>  drivers/media/platform/omap3isp/ispccp2.c     | 10 +++-
>  drivers/media/platform/omap3isp/isph3a_aewb.c | 21 +++++---
>  drivers/media/platform/omap3isp/isph3a_af.c   | 21 +++++---
>  drivers/media/platform/omap3isp/isphist.c     |  5 +-
>  5 files changed, 92 insertions(+), 36 deletions(-)

-- 
Regards,

Laurent Pinchart