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From:   butt3rflyh4ck <butterflyhuangxx@gmail.com>
Date:   Thu, 29 Sep 2022 22:52:10 +0800
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Subject: Re: A divide error bug in snd_pcm_write
To:     Takashi Iwai <tiwai@suse.de>
Cc:     perex@perex.cz, tiwai@suse.com,
        pierre-louis.bossart@linux.intel.com, broonie@kernel.org,
        alsa-devel@alsa-project.org, LKML <linux-kernel@vger.kernel.org>
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This one fixes the problem.
https://lore.kernel.org/all/20220926135558.26580-2-tiwai@suse.de/

Regards,
 butt3rflyh4ck.

On Tue, Sep 27, 2022 at 2:01 AM Takashi Iwai <tiwai@suse.de> wrote:
>
> On Mon, 26 Sep 2022 19:16:48 +0200,
> butt3rflyh4ck wrote:
> >
> > The latest kernel upstream.
> > Yes, but using mmap, you can map the runtime->status page, and then
> > copy the data through memcpy to overwrite the status->state data, or
> > even more, which is incredible.
>
> Ah, then that's exactly the case my latest patch set covers.
> Either the first patch or the second patch alone should work.
>   https://lore.kernel.org/r/20220926135558.26580-2-tiwai@suse.de
>   https://lore.kernel.org/r/20220926135558.26580-3-tiwai@suse.de
>
> Could you verify either of them fixes the problem?
>
>
> thanks,
>
> Takashi


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