ext4: Fix bug_on in ext4_writepages
Summary
GSD-2022-1003697: ext4: fix bug_on in ext4_writepages. Affects Kernel versions < 73fd5b19285197078ee8a2e651d75d5b094a4de9. No fix is published. How to fix ↓
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Background
The ext4 filesystem is a widely used filesystem in the Linux kernel. It provides features such as journaling, scalability, and support for large file systems. The ext4_writepages function is responsible for writing dirty pages to disk. However, a bug in this function can lead to a bug_on assertion failure, potentially causing a denial of service or other security issues.
Vulnerability Detail
The vulnerability in ext4_writepages arises from a bug_on assertion failure. When this failure occurs, it triggers a kernel panic, leading to a system crash. An attacker could potentially exploit this vulnerability to cause a denial of service by triggering the bug_on assertion failure. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. Updating the Linux Kernel to the fixed version is the recommended solution.
Conclusion
The ext4 filesystem has a vulnerability in the ext4_writepages function that can lead to a bug_on assertion failure and system crash. It is recommended to update the Linux Kernel to version v5.4.198 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
ext4 is a widely used filesystem in the Linux kernel, providing features such as journaling, scalability, and support for large file systems.
ext4_writepages is a function in the ext4 filesystem responsible for writing dirty pages to disk.
A bug_on assertion failure is a condition where a specific assertion in the code fails, triggering a kernel panic and potentially causing a system crash.
The impact of this vulnerability is a potential denial of service due to a bug_on assertion failure and subsequent system crash.
To fix this vulnerability, update your Linux Kernel to version v5.4.198 or later.
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