linux-kernel - Re: [PATCH v1] ALSA: hda/tas2781: Fix a potential race condition that causes a NULL pointer in case no efi.get

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Message-ID: <87h5x9rmtb.wl-tiwai@suse.de>
Date: Thu, 11 Sep 2025 18:11:44 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Shenghao Ding <shenghao-ding@...com>
Cc: <broonie@...nel.org>,
	<andriy.shevchenko@...ux.intel.com>,
	<13564923607@....com>,
	<13916275206@....com>,
	<alsa-devel@...a-project.org>,
	<linux-kernel@...r.kernel.org>,
	<baojun.xu@...com>,
	<Baojun.Xu@....com>
Subject: Re: [PATCH v1] ALSA: hda/tas2781: Fix a potential race condition that causes a NULL pointer in case no efi.get_variable exsits

On Thu, 11 Sep 2025 09:11:31 +0200,
Shenghao Ding wrote:
> 
> A a potential race condition reported by one of my customers that leads to
> a NULL pointer dereference, where the call to efi.get_variable should be
> guarded with efi_rt_services_supported() to ensure that function exists.
> 
> Fixes: 4fe238513407 ("ALSA: hda/tas2781: Move and unified the calibrated-data getting function for SPI and I2C into the tas2781_hda lib")
> Signed-off-by: Shenghao Ding <shenghao-ding@...com>

Thanks, applied now.


Takashi