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ASoC: qcom: Adjust issues in case of DT error in asoc_qcom_lpass_cpu_platform_probe()

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If IORESOURCE_MEM "lpass-rxtx-cdc-dma-lpm" or "lpass-va-cdc-dma-lpm"
resources is not provided in Device Tree due to any error,
platform_get_resource_byname() will return NULL which is later
dereferenced. According to sound/qcom,lpass-cpu.yaml, these resources
are provided, but DT can be broken due to any error. In such cases driver
must be able to protect itself, since the DT is external data for the
driver.
Adjust this issues by adding NULL return check.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: b138706225 ("ASoC: qcom: Add regmap config support for codec dma driver")
Signed-off-by: Aleksandr Mishin <amishin@t-argos.ru>
Link: https://patch.msgid.link/20240605104953.12072-1-amishin@t-argos.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Aleksandr Mishin 2024-06-05 13:49:53 +03:00 committed by Mark Brown
parent 06462d6f3f
commit f9f7f29f64
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 0 deletions
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4
sound/soc/qcom/lpass-cpu.c
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@ -1166,9 +1166,13 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
} }
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-rxtx-cdc-dma-lpm"); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-rxtx-cdc-dma-lpm");
if (!res)
return -EINVAL;
drvdata->rxtx_cdc_dma_lpm_buf = res->start; drvdata->rxtx_cdc_dma_lpm_buf = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-va-cdc-dma-lpm"); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-va-cdc-dma-lpm");
if (!res)
return -EINVAL;
drvdata->va_cdc_dma_lpm_buf = res->start; drvdata->va_cdc_dma_lpm_buf = res->start;
} }