linux-kernel - Re: A divide error bug in snd_pcm

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Message-ID: <87tu4q6tu8.wl-tiwai@suse.de>
Date:   Thu, 29 Sep 2022 18:14:39 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     butt3rflyh4ck <butterflyhuangxx@...il.com>
Cc:     perex@...ex.cz, tiwai@...e.com,
        pierre-louis.bossart@...ux.intel.com, broonie@...nel.org,
        alsa-devel@...a-project.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: A divide error bug in snd_pcm_write

On Thu, 29 Sep 2022 16:52:10 +0200,
butt3rflyh4ck wrote:
> 
> This one fixes the problem.
> https://lore.kernel.org/all/20220926135558.26580-2-tiwai@suse.de/

Thanks for confirmation!  The fix should be included in 6.1-rc1.


Takashi

> 
> Regards,
>  butt3rflyh4ck.
> 
> On Tue, Sep 27, 2022 at 2:01 AM Takashi Iwai <tiwai@...e.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
> 
> 
> 
> -- 
> Active Defense Lab of Venustech
>