Re: [PATCH] ASoC: hdac_hda: Fix NULL pointer dereference when hda_pvt is not set

[Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>]

Hi,

On Tue, Dec 12, 2023 at 8:45 PM Kai Vehmanen
<kai.vehmanen@xxxxxxxxxxxxxxx> wrote:
>
> Hi,
>
> On Tue, 12 Dec 2023, Kai-Heng Feng wrote:
>
> > Kernel splat can be found on boot:
> > [    7.906438] BUG: kernel NULL pointer dereference, address: 0000000000000078
> > [    7.906449] #PF: supervisor read access in kernel mode
> > [    7.906455] #PF: error_code(0x0000) - not-present page
> [...]
> > This is caused by attempting to dereference hda_pvt, so check if it's
> > NULL before using it.
> >
> > Fixes: a0575b4add21 ("ASoC: hdac_hda: Conditionally register dais for HDMI and Analog")
>
> can you try this fix already merged to Mark's tree (merged on 7th Dec):
>
> "ASoC: SOF: Intel: hda-codec: Delay the codec device registration"
> https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/commit/?id=ce17aa4cf2db7d6b95a3f854ac52d0d49881dd49

Yes this commit fixes the issue. Thanks!

Kai-Heng

>
> Br, Kai