linux-kernel - Re: [PATCH] videodev2: Set vb2_rect's width and height as unsigned

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:	Wed, 6 Nov 2013 15:41:48 +0100
From:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To:	Sakari Ailus <sakari.ailus@....fi>
Cc:	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Hans Verkuil <hans.verkuil@...co.com>,
	"Lad, Prabhakar" <prabhakar.csengg@...il.com>,
	Frank Schäfer <fschaefer.oss@...glemail.com>,
	Ondrej Zary <linux@...nbow-software.org>,
	"open list:MT9M032 APTINA SE..." <linux-media@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] videodev2: Set vb2_rect's width and height as unsigned

Hello Sakari.

Thanks for your comments. I have fixed them, but I will wait some time
to get more comments, to avoid spamming the list.

Thanks!

On Wed, Nov 6, 2013 at 3:19 PM, Sakari Ailus <sakari.ailus@....fi> wrote:
> Hi Ricardo,
>
> Thanks for the patch.
>
> On Wed, Nov 06, 2013 at 01:49:25PM +0100, Ricardo Ribalda Delgado wrote:
> ...
>> diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c
>> index ae66d91..9036e64 100644
>> --- a/drivers/media/i2c/smiapp/smiapp-core.c
>> +++ b/drivers/media/i2c/smiapp/smiapp-core.c
>> @@ -2028,8 +2028,8 @@ static int smiapp_set_crop(struct v4l2_subdev *subdev,
>>       sel->r.width = min(sel->r.width, src_size->width);
>>       sel->r.height = min(sel->r.height, src_size->height);
>>
>> -     sel->r.left = min(sel->r.left, src_size->width - sel->r.width);
>> -     sel->r.top = min(sel->r.top, src_size->height - sel->r.height);
>> +     sel->r.left = min(sel->r.left, (int) (src_size->width - sel->r.width));
>> +     sel->r.top = min(sel->r.top, (int) (src_size->height - sel->r.height));
>
> How about min_t(int, ... instead?
>
>>       *crops[sel->pad] = sel->r;
>>
>> @@ -2121,8 +2121,10 @@ static int smiapp_set_selection(struct v4l2_subdev *subdev,
>>
>>       sel->r.left = max(0, sel->r.left & ~1);
>>       sel->r.top = max(0, sel->r.top & ~1);
>> -     sel->r.width = max(0, SMIAPP_ALIGN_DIM(sel->r.width, sel->flags));
>> -     sel->r.height = max(0, SMIAPP_ALIGN_DIM(sel->r.height, sel->flags));
>> +     sel->r.width = max_t(unsigned int, 0,
>> +                     SMIAPP_ALIGN_DIM(sel->r.width, sel->flags));
>> +     sel->r.height = max_t(unsigned int, 0,
>> +                     SMIAPP_ALIGN_DIM(sel->r.height, sel->flags));
>
> The purpose of this check is to ensure the number is at least zero, and as
> width and height are now unsigned, max_t() won't be needed anymore. Only
> SMIAPP_ALIGN_DIM() is.
>
> I can't see any harm from that, though --- there could be redundant checks
> in other drivers, too.
>
>>       sel->r.width = max_t(unsigned int,
>>                            sensor->limits[SMIAPP_LIMIT_MIN_X_OUTPUT_SIZE],
>
> Do you think it'd be worth adding a note on this change to the list of V4L2
> in each kernel version in Documentation/DocBook/media/v4l/compat.xml?
>
> --
> Kind regards,
>
> Sakari Ailus
> e-mail: sakari.ailus@....fi     XMPP: sailus@...iisi.org.uk



-- 
Ricardo Ribalda
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/