Fix sleeping function called from invalid context on RT kernel in Kernel
Summary
GSD-2022-1003687: tracing: Fix sleeping function called from invalid context on RT kernel. Affects Kernel versions < 48c6ee7d6c614f09b2c8553a95eefef6ecf196e0. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities and services to enable the proper functioning of the system. The identified vulnerability in the Kernel involves a sleeping function being called from an invalid context on the Real-Time (RT) kernel. This vulnerability can potentially lead to system instability, crashes, or other unpredictable behavior.
Vulnerability Detail
The vulnerability arises from a sleeping function being invoked from an invalid context on the RT kernel. This can occur when the sleeping function is called from an execution path where sleeping is not allowed, such as within an interrupt handler or a critical section. As a result, the system may enter an inconsistent state or experience unexpected delays. Attackers could potentially exploit this vulnerability to disrupt system operations, cause denial of service, or execute arbitrary code with elevated privileges. It is important to note that the impact and attack plausibility of this vulnerability have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, developers can review their codebase and ensure that sleeping functions are not invoked from invalid contexts on the RT kernel. This involves identifying and modifying any code paths where sleeping is not allowed, such as interrupt handlers or critical sections. By carefully managing the execution flow and avoiding sleeping function calls in restricted contexts, the vulnerability can be mitigated.
Conclusion
The identified vulnerability in the Kernel involves a sleeping function being called from an invalid context on the RT kernel. This can lead to system instability, crashes, or other unpredictable behavior. It is crucial to update the Linux Kernel to version v5.4.198 or later to mitigate this vulnerability. Developers can also review their codebase and ensure that sleeping functions are not invoked from invalid contexts on the RT kernel. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a fundamental component of the Linux operating system that facilitates communication between hardware and software layers.
This vulnerability can lead to system instability, crashes, or other unpredictable behavior. Attackers may exploit it to disrupt system operations or execute arbitrary code with elevated privileges.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.4.198 or later, which includes the necessary patch.
Developers can review their codebase and ensure that sleeping functions are not called from invalid contexts on the RT kernel. By avoiding sleeping function calls in restricted contexts, the vulnerability can be mitigated.
No, the impact and attack plausibility of this vulnerability have not been proven.
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