linux-kernel - Re: [PATCH] media: v4l2-compat-ioctl32.c: copy reserved2 field in get_v4l2

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Message-ID: <20200417083506.GB141762@kroah.com>
Date:   Fri, 17 Apr 2020 10:35:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     sy0816.kang@...sung.com
Cc:     mchehab@...nel.org, Hans Verkuil <hverkuil-cisco@...all.nl>,
        Arnd Bergmann <arnd@...db.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: v4l2-compat-ioctl32.c: copy reserved2 field in
 get_v4l2_buffer32

On Fri, Apr 17, 2020 at 11:45:23AM +0900, sy0816.kang@...sung.com wrote:
> From: Sunyoung Kang <sy0816.kang@...sung.com>
> 
> get_v4l2_buffer32() didn't copy reserved2 field from userspace to driver.
> So the reserved2 value is not received through compat-ioctl32 in driver.
> This patch copy reserved2 field of v4l2_buffer in get_v4l2_buffer32().
> 
> Signed-off-by: Sunyoung Kang <sy0816.kang@...sung.com>
> ---
>  drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 1 +
>  1 file changed, 1 insertion(+)

What driver is using the reserved fields?  They should be ignored as
they are "reserved" for future use.

thanks,

greg k-h