ext4: Make mb_optimize_scan performance mount option work with extents
Summary
GSD-2022-1001906: ext4: make mb_optimize_scan performance mount option work with extents. Affects Kernel versions >= 196e402adf2e4cd66f101923409f1970ec5f1af3, < 3c65b7309d2e0dd8d134e7813cd95debd91ea07b. No fix is published. How to fix ↓
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Background
The ext4 package is a file system driver for the Linux kernel. It provides support for the ext4 file system, which is commonly used in Linux distributions. The ext4 file system is known for its performance and reliability. However, a vulnerability has been discovered in the ext4 package that affects the mb_optimize_scan performance mount option when used with extents.
Vulnerability Detail
The vulnerability in the ext4 package allows an attacker to exploit the mb_optimize_scan performance mount option when used with extents. This can lead to potential security vulnerabilities, although the actual impact and attack plausibility have not yet been proven. The vulnerability was introduced in version v5.13 of the Linux Kernel and was fixed in version v5.15.33 by commit 3c65b7309d2e0dd8d134e7813cd95debd91ea07b.
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.
Conclusion
The ext4 package has a vulnerability that affects the mb_optimize_scan performance mount option when used with extents. To mitigate this vulnerability, it is important to update the Linux Kernel to version v5.15.33 or later. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The ext4 package is a file system driver for the Linux kernel that provides support for the ext4 file system.
The mb_optimize_scan performance mount option is a feature in the ext4 package that aims to improve performance by optimizing the scanning of metadata blocks.
Extents are a feature of the ext4 file system that allows for more efficient storage of large contiguous blocks of data.
The impact of this vulnerability is not yet proven, but it has the potential to introduce security vulnerabilities in systems using the mb_optimize_scan performance mount option with extents.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.33 or later.
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