linux-kernel - Re: [PATCH next 1/2] media: mtk-mdp: fix video_device

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <dbaa8b70-ea72-7d9b-176c-6c0a816aaae8@xs4all.nl>
Date:   Thu, 3 Nov 2016 13:47:35 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Vincent Stehlé <vincent.stehle@...oste.net>
Cc:     linux-media@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>
Subject: Re: [PATCH next 1/2] media: mtk-mdp: fix video_device_release
 argument

Hi Vincent,

On 28/10/16 09:52, Vincent Stehlé wrote:
> On Thu, Oct 27, 2016 at 10:23:24PM +0200, Vincent Stehlé wrote:
>> video_device_release() takes a pointer to struct video_device as argument.
>> Fix two call sites where the address of the pointer is passed instead.
>
> Sorry, I messed up: please ignore that "fix". The 0day robot made me
> realize this is indeed not a proper fix.
>
> The issue remains, though: we cannot call video_device_release() on the
> vdev structure member, as this will in turn call kfree(). Most probably,
> vdev needs to be dynamically allocated, or the call to
> video_device_release() dropped completely.

I prefer that vdev is dynamically allocated. There are known problems with
embedded video_device structs, so allocating it is preferred.

Minghsiu, can you do that?

Regards,

	Hans

>
> Sorry for the bad patch.
>
> Best regards,
>
> Vincent.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>