nilfs2 filesystem directory operation causing kernel BUG_ON fix

From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - Issue: After detecting filesystem corruption and degrading to read-only mode during directory operations, the function in nilfs2 may fail, causing the check to fail and triggering a kernel panic. - Cause: During nilfs2's internal handling, when a page/label is discarded, the "checked" flag is not cleared, leading to directory entry checks being skipped upon reloading the page/label. 2. Fix: - Resolution: Clear the "checked" flag in nilfs2's internal handling when a page/label is discarded. - Impact: This fix applies to all files except metadata files. 3. Related Links: - Report: https://lkml.kernel.org/r/20241017193359.5051-1-konishi.ryusuke@gmail.com - Fix: 8c26c4e2694a ("nilfs2: fix issue with flush kernel thread after remount in RO mode because of driver's internal error or metadata corruption") 4. Authors and Contributors: - Author: Ryusuke Konishi - Contributors: Greg Kroah-Hartman, Andrew Morton 5. Code Changes: - File: - Change: Added code to clear the "checked" flag in the function. This information provides a detailed overview of the vulnerability's context, the applied fix, and associated code modifications, aiding in understanding the nature of the issue and the remediation process.

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nilfs2 filesystem directory operation causing kernel BUG_ON fix