Vulnerability in ASoC: atmel Package - Missing of_node_put() in at91sam9g20ek_audio_probe
Summary
GSD-2022-1001874: ASoC: atmel: Add missing of_node_put() in at91sam9g20ek_audio_probe. Affects Kernel versions >= 531f67e41dcde1e358cf821d056241a66355cf03, < a0bc36b247dcf4d21bf820bfc4bcbaf7f6cf19b5. No fix is published. How to fix ↓
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Background
The ASoC (Audio System on Chip) package is a component of the Linux Kernel that provides support for audio functionality on various hardware platforms. It includes drivers and frameworks for audio codecs, digital audio interfaces, and audio processing. The atmel package within ASoC specifically targets Atmel SoCs (System on Chips) and provides audio support for these devices. One of the drivers in this package is at91sam9g20ek_audio_probe, which is responsible for initializing the audio subsystem on the Atmel AT91SAM9G20EK development board.
Vulnerability Detail
The vulnerability in the atmel package arises from a missing of_node_put() function call in the at91sam9g20ek_audio_probe driver. This function is responsible for releasing a reference to a device tree node obtained using the of_get_child_by_name() function. The absence of the of_node_put() call leads to a reference leak, potentially causing memory leaks and resource exhaustion over time. An attacker could potentially exploit this vulnerability to exhaust system resources, leading to a denial-of-service condition or other security implications.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by ensuring they are running an updated version of the Linux Kernel that includes the fix.
Conclusion
The vulnerability in the ASoC atmel package, specifically in the at91sam9g20ek_audio_probe driver, can lead to memory leaks and resource exhaustion. It is crucial to update to a version of the Linux Kernel that includes the fix to prevent potential security implications. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
ASoC (Audio System on Chip) is a component of the Linux Kernel that provides support for audio functionality on various hardware platforms. It includes drivers and frameworks for audio codecs, digital audio interfaces, and audio processing.
The atmel package within ASoC specifically targets Atmel SoCs (System on Chips) and provides audio support for these devices. It includes drivers and configurations for Atmel audio hardware.
The at91sam9g20ek_audio_probe driver is responsible for initializing the audio subsystem on the Atmel AT91SAM9G20EK development board. It is part of the atmel package in ASoC.
The missing of_node_put() call in the at91sam9g20ek_audio_probe driver can lead to memory leaks and resource exhaustion over time. This can potentially result in a denial-of-service condition or other security implications.
To fix this vulnerability, update to Linux Kernel version v5.15.33 or any subsequent version that includes the fix. Ensure that the missing of_node_put() call is added in the at91sam9g20ek_audio_probe driver.
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