linux-kernel - Re: [PATCH v2] ASoC: SOF: Intel: Fix NULL ptr dereference when ENOMEM

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Message-ID: <YhfLCWm0Ms3E+j4z@sirena.org.uk>
Date:   Thu, 24 Feb 2022 18:14:33 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Ammar Faizi <ammarfaizi2@...weeb.org>
Cc:     Daniel Baluta <daniel.baluta@....com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Keyon Jie <yang.jie@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Rander Wang <rander.wang@...el.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Takashi Iwai <tiwai@...e.com>, stable@...r.kernel.org,
        sound-open-firmware@...a-project.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ASoC: SOF: Intel: Fix NULL ptr dereference when ENOMEM

On Fri, Feb 25, 2022 at 01:08:50AM +0700, Ammar Faizi wrote:

> The dmesg says:
> 
>   [ T1387] sof-audio-pci-intel-tgl 0000:00:1f.3: error: memory alloc failed: -12
>   [ T1387] BUG: kernel NULL pointer dereference, address: 0000000000000000
>   [ T1387] #PF: supervisor read access in kernel mode
>   [ T1387] #PF: error_code(0x0000) - not-present page
>   [ T1387] PGD 0 P4D 0
>   [ T1387] Oops: 0000 [#1] PREEMPT SMP NOPTI

This is still an enormous and not super useful section of backtrace, at
a glance the backtrace is longer than the rest of the commit :(

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