Fix for event handling soft lockup in iommu/arm-smmu-v3
Summary
GSD-2022-1002480: iommu/arm-smmu-v3: fix event handling soft lockup. Affects Kernel versions < ffa0495a506d5edbd1b4ad45a2759bc080856695. No fix is published. How to fix ↓
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Background
The iommu/arm-smmu-v3 is a component of the Linux Kernel that provides support for Input-Output Memory Management Units (IOMMUs) on ARM-based systems. It is responsible for managing memory access and translation for devices connected to the system. The arm-smmu-v3 module specifically handles event handling related to IOMMU operations. However, a vulnerability has been discovered in this module that can lead to a soft lockup, causing the system to become unresponsive.
Vulnerability Detail
The vulnerability in iommu/arm-smmu-v3 module can result in a soft lockup, where the system becomes unresponsive due to a deadlock or infinite loop. This can be triggered by certain events related to IOMMU operations. The impact of this vulnerability can vary depending on the specific system and workload, but it has the potential to disrupt normal system operation and cause denial of service. The vulnerability has been fixed in Linux Kernel version v4.9.311 by commit ffa0495a506d5edbd1b4ad45a2759bc080856695.
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. The recommended approach is to apply the fix by updating the Linux Kernel.
Conclusion
The iommu/arm-smmu-v3 module in the Linux Kernel is vulnerable to a soft lockup issue, which can cause the system to become unresponsive. It is crucial to update the Linux Kernel to version v4.9.311 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
iommu/arm-smmu-v3 is a component of the Linux Kernel that provides support for Input-Output Memory Management Units (IOMMUs) on ARM-based systems. It manages memory access and translation for devices connected to the system.
A soft lockup refers to a situation where the system becomes unresponsive due to a deadlock or infinite loop in the code. It can be triggered by certain events or conditions.
The impact of this vulnerability can vary depending on the specific system and workload. However, it has the potential to disrupt normal system operation and cause denial of service.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.9.311 or later. This can be done by obtaining the latest kernel source code and compiling it for the target system.
There is no specific workaround mentioned for this vulnerability. The recommended approach is to apply the fix by updating the Linux Kernel.
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