linux-kernel - Re: [PATCH] [media] vb2: include length in dmabuf qbuf debug message

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]

Message-ID: <20160720130356.GB7976@valkosipuli.retiisi.org.uk>
Date:	Wed, 20 Jul 2016 16:03:57 +0300
From:	Sakari Ailus <sakari.ailus@....fi>
To:	Javier Martinez Canillas <javier@....samsung.com>
Cc:	linux-kernel@...r.kernel.org,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Mauro Carvalho Chehab <mchehab@...pensource.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Pawel Osciak <pawel@...iak.com>, linux-media@...r.kernel.org
Subject: Re: [PATCH] [media] vb2: include length in dmabuf qbuf debug message

Hi Javier,

Thanks for the patch!

On Thu, Jul 14, 2016 at 11:09:34AM -0400, Javier Martinez Canillas wrote:
> If the the VIDIOC_QBUF ioctl fails due a wrong dmabuf length,
> it's useful to get the invalid length as a debug information.
> 
> Before this patch:
> 
> vb2-core: __qbuf_dmabuf: invalid dmabuf length for plane 1
> 
> After this patch:
> 
> vb2-core: __qbuf_dmabuf: invalid dmabuf length 221248 for plane 1
> 
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> 
> ---
> 
>  drivers/media/v4l2-core/videobuf2-core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
> index ca8ffeb56d72..97d1483e0f7a 100644
> --- a/drivers/media/v4l2-core/videobuf2-core.c
> +++ b/drivers/media/v4l2-core/videobuf2-core.c
> @@ -1228,8 +1228,8 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const void *pb)
>  			planes[plane].length = dbuf->size;
>  
>  		if (planes[plane].length < vb->planes[plane].min_length) {
> -			dprintk(1, "invalid dmabuf length for plane %d\n",
> -				plane);
> +			dprintk(1, "invalid dmabuf length %d for plane %d\n",

%u, please. You might want to print the minimum length as well.

> +				planes[plane].length, plane);
>  			dma_buf_put(dbuf);
>  			ret = -EINVAL;
>  			goto err;

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk