[PATCH v3] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()

[PATCH v3] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()

[Gax-c]

From: Zichen Xie <zichenxie0106@gmail.com>

A devm_kzalloc() in asoc_qcom_lpass_cpu_platform_probe() could
possibly return NULL pointer. NULL Pointer Dereference may be
triggerred without addtional check.
Add a NULL check for the returned pointer.

Fixes: b5022a36d28f ("ASoC: qcom: lpass: Use regmap_field for i2sctl and dmactl registers")
Cc: stable@vger.kernel.org
Signed-off-by: Zichen Xie <zichenxie0106@gmail.com>
---
v2: Fix "From" tag.
v3: Format tags to Fixes/Cc/Signed-off-by.
---
 sound/soc/qcom/lpass-cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index 5a47f661e0c6..242bc16da36d 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -1242,6 +1242,8 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
 	/* Allocation for i2sctl regmap fields */
 	drvdata->i2sctl = devm_kzalloc(&pdev->dev, sizeof(struct lpaif_i2sctl),
 					GFP_KERNEL);
+	if (!drvdata->i2sctl)
+		return -ENOMEM;
 
 	/* Initialize bitfields for dai I2SCTL register */
 	ret = lpass_cpu_init_i2sctl_bitfields(dev, drvdata->i2sctl,
-- 
2.25.1

Re: [PATCH v3] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()

[Markus Elfring]

> A devm_kzalloc() in asoc_qcom_lpass_cpu_platform_probe() could

                   call?


> possibly return NULL pointer. NULL Pointer Dereference may be

Can the term “null pointer dereference” be applied for
the final commit message (including the summary phrase)?


> triggerred without addtional check.

  triggered?         additional?


Regards,
Markus

Re: [PATCH v3] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()

[Mark Brown]

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On Mon, Oct 07, 2024 at 03:16:27PM +0200, Markus Elfring wrote:
> > A devm_kzalloc() in asoc_qcom_lpass_cpu_platform_probe() could
> 
>                    call?
> 
> 
> > possibly return NULL pointer. NULL Pointer Dereference may be
> 
> Can the term “null pointer dereference” be applied for
> the final commit message (including the summary phrase)?
> 
> 
> > triggerred without addtional check.
> 
>   triggered?         additional?

Feel free to ignore Markus, he has a long history of sending
unhelpful review comments and continues to ignore repeated requests
to stop.

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Re: [v3?] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()

[Markus Elfring]

…
> ---
> v2: Fix "From" tag.
> v3: Format tags to Fixes/Cc/Signed-off-by.
> ---
…

* How do you think about to reconsider the version numbers
  a bit more?

* Would you like to mention the repeated adjustment of
  the patch subject?

* Can a duplicate marker line be replaced by a blank line?


See also:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.12-rc2#n231

Is the email address “linux-kernel@vger.kernel.org” still relevant here?

Regards,
Markus

Re: [v3?] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()

[Mark Brown]

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On Mon, Oct 07, 2024 at 03:40:21PM +0200, Markus Elfring wrote:

> * How do you think about to reconsider the version numbers
>   a bit more?
> 
> * Would you like to mention the repeated adjustment of
>   the patch subject?
> 
> * Can a duplicate marker line be replaced by a blank line?

Feel free to ignore Markus, he has a long history of sending
unhelpful review comments and continues to ignore repeated requests
to stop.

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Re: [PATCH v3] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()

[Mark Brown]

On Sun, 06 Oct 2024 15:57:37 -0500, Gax-c wrote:
> A devm_kzalloc() in asoc_qcom_lpass_cpu_platform_probe() could
> possibly return NULL pointer. NULL Pointer Dereference may be
> triggerred without addtional check.
> Add a NULL check for the returned pointer.
> 
> 

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()
      commit: 49da1463c9e3d2082276c3e0e2a8b65a88711cd2

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark