linux-kernel - Re: [PATCH] ALSA: hda/tas2781: handle missing EFI calibration data

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]

Date:   Mon, 11 Dec 2023 08:59:08 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Gergo Koteles <soyer@....hu>
Cc:     Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>,
        Baojun Xu <baojun.xu@...com>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org, stable@...r.kernel.org
Subject: Re: [PATCH] ALSA: hda/tas2781: handle missing EFI calibration data

On Mon, 11 Dec 2023 00:37:33 +0100,
Gergo Koteles wrote:
> 
> The code does not properly check whether the calibration variable is
> available in the EFI. If it is not available, it causes a NULL pointer
> dereference.
> 
> Check the return value of the first get_variable call also.
> 
> BUG: kernel NULL pointer dereference, address: 0000000000000000
> Call Trace:
>  <TASK>
>  ? __die+0x23/0x70
>  ? page_fault_oops+0x171/0x4e0
>  ? srso_alias_return_thunk+0x5/0x7f
>  ? schedule+0x5e/0xd0
>  ? exc_page_fault+0x7f/0x180
>  ? asm_exc_page_fault+0x26/0x30
>  ? crc32_body+0x2c/0x120
>  ? tas2781_save_calibration+0xe4/0x220 [snd_hda_scodec_tas2781_i2c]
>  tasdev_fw_ready+0x1af/0x280 [snd_hda_scodec_tas2781_i2c]
>  request_firmware_work_func+0x59/0xa0
> 
> Fixes: 5be27f1e3ec9 ("ALSA: hda/tas2781: Add tas2781 HDA driver")
> CC: stable@...r.kernel.org
> Signed-off-by: Gergo Koteles <soyer@....hu>

Thanks, applied now.


Takashi