linux-kernel - Re: [BUG] media: cx88-alsa: Found a bug at the probe time

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Message-ID: <CAMhUBjnUfH6hKgP7nwoCXphwMtc838zjzJZuUuNzOo4b+cESHA@mail.gmail.com>
Date:   Sun, 17 Jul 2022 08:05:27 +0800
From:   Zheyu Ma <zheyuma97@...il.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] media: cx88-alsa: Found a bug at the probe time

On Sun, Jul 17, 2022 at 3:03 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>
> Hi--
>
> On 7/14/22 18:54, Zheyu Ma wrote:
> > Hello,
> >
> > I found a bug in the driver cx88-alsa.
> >
> > When the driver fails in the function snd_cx88_create() at the probe
> > time, it will cause a UAF bug as follows:
>
> It's not a UAF. It's a WARN() macro with an IRQ management problem,
> as shown in the next 2 lines below:

You are right, that is indeed just a warning :)

regards,

Zheyu Ma