From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - Issue Description: When nilfs2 reads a corrupted filesystem image and degrades to read-only mode, it may cause the BUG_ON check in the submit_bh_wbc() function to fail, leading to a kernel vulnerability. - Cause: This occurs because the buffer delay flag is not cleared when clearing buffer states to discard pages/volumes or buffer heads. 2. Fix: - Fix Method: The issue was resolved by extending the buffer state clearing routine in nilfs2. If the buffer is written normally via journaling, this state inconsistency will not occur. 3. Remediation: - Remediation: Fixed the buffer clearing issue in nilfs2, resolving problems with buffer threads in the kernel after mounting in RO mode due to internal driver errors or metadata corruption. 4. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 5. Remediation: - Remediation: Fixed the buffer clearing issue in nilfs2, resolving problems with buffer threads in the kernel after mounting in RO mode due to internal driver errors or metadata corruption. 6. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 7. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 8. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 9. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 10. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 11. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 12. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 13. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 14. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 15. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 16. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07 17. Related Links: - Report Link: https://lore.kernel.org/r/20241015213300.7114-1-konishi.ryusuke@gmail.com - Fix Link: https://github.com/torvalds/linux/commit/6ed469df0bfbef3e4b44fca954a781919db9f7ab - Report Link: https://syzkaller.appspot.com/bug?extid=985ada84bf055a575c07