linux-kernel - Re: [PATCH] ASoC: hdac_hda: Fix NULL pointer dereference when hda

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <CAAd53p7BEanFM-3Z257WiEZpnuLP+bn2owx19z0s7Vx2KZ8H0w@mail.gmail.com>
Date:   Wed, 13 Dec 2023 09:59:03 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Cc:     lgirdwood@...il.com, broonie@...nel.org,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: hdac_hda: Fix NULL pointer dereference when hda_pvt
 is not set

Hi,

On Tue, Dec 12, 2023 at 8:45 PM Kai Vehmanen
<kai.vehmanen@...ux.intel.com> 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