Missing of_node_put() in nmk_pinctrl_probe in Kernel

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1002231: pinctrl: nomadik: Add missing of_node_put() in nmk_pinctrl_probe. Affects Kernel versions >= 32e67eee670e1254ee5ab41e2f454680acb9c17c, < bc1e29a35147c1ba6ea2b06a16cb0028f7c852d2. No fix is published. How to fix ↓

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Background

The Kernel is a crucial component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functionalities for the proper functioning of the system. The pinctrl subsystem in the Kernel allows for the configuration and control of pin multiplexing and GPIOs on various platforms. The nomadik pinctrl driver is responsible for handling pin control on Nomadik platforms. However, a vulnerability has been identified in the nmk_pinctrl_probe function, where a call to of_node_put() is missing. This vulnerability can potentially lead to resource leaks and other issues.

Vulnerability Detail

The missing of_node_put() call in nmk_pinctrl_probe can result in resource leaks and other problems. When the driver probes a device node, it acquires a reference to the node using of_node_get(). However, if the probe fails or encounters an error, the of_node_put() function should be called to release the reference. Without this call, the reference count remains incremented, leading to resource leaks. Attackers may be able to exploit these leaks to exhaust system resources or cause other unexpected behavior. This vulnerability was introduced in Kernel version v3.9 and is fixed in version v5.4.189.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, developers should ensure that the of_node_put() function is called in the nmk_pinctrl_probe function after any failure or error condition. This will release the acquired reference to the device node and prevent resource leaks. The fix for this vulnerability has been implemented in Kernel version v5.4.189, so updating to this version or any subsequent version will resolve the issue.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The missing of_node_put() call in nmk_pinctrl_probe in the Kernel can lead to resource leaks and other unexpected behavior. It is important to update to Kernel version v5.4.189 or any subsequent version to fix this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.

See every vulnerability recorded for Kernel →