CVE - CVE-2024-26696

CVE-ID
CVE-2024-26696	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix hang in nilfs_lookup_dirty_data_buffers() Syzbot reported a hang issue in migrate_pages_batch() called by mbind() and nilfs_lookup_dirty_data_buffers() called in the log writer of nilfs2. While migrate_pages_batch() locks a folio and waits for the writeback to complete, the log writer thread that should bring the writeback to completion picks up the folio being written back in nilfs_lookup_dirty_data_buffers() that it calls for subsequent log creation and was trying to lock the folio. Thus causing a deadlock. In the first place, it is unexpected that folios/pages in the middle of writeback will be updated and become dirty. Nilfs2 adds a checksum to verify the validity of the log being written and uses it for recovery at mount, so data changes during writeback are suppressed. Since this is broken, an unclean shutdown could potentially cause recovery to fail. Investigation revealed that the root cause is that the wait for writeback completion in nilfs_page_mkwrite() is conditional, and if the backing device does not require stable writes, data may be modified without waiting. Fix these issues by making nilfs_page_mkwrite() wait for writeback to finish regardless of the stable write requirement of the backing device.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/228742b2ddfb99dfd71e5a307e6088ab6836272e URL:https://git.kernel.org/stable/c/228742b2ddfb99dfd71e5a307e6088ab6836272e MISC:https://git.kernel.org/stable/c/38296afe3c6ee07319e01bb249aa4bb47c07b534 URL:https://git.kernel.org/stable/c/38296afe3c6ee07319e01bb249aa4bb47c07b534 MISC:https://git.kernel.org/stable/c/7e9b622bd0748cc104d66535b76d9b3535f9dc0f URL:https://git.kernel.org/stable/c/7e9b622bd0748cc104d66535b76d9b3535f9dc0f MISC:https://git.kernel.org/stable/c/8494ba2c9ea00a54d5b50e69b22c55a8958bce32 URL:https://git.kernel.org/stable/c/8494ba2c9ea00a54d5b50e69b22c55a8958bce32 MISC:https://git.kernel.org/stable/c/862ee4422c38be5c249844a684b00d0dbe9d1e46 URL:https://git.kernel.org/stable/c/862ee4422c38be5c249844a684b00d0dbe9d1e46 MISC:https://git.kernel.org/stable/c/98a4026b22ff440c7f47056481bcbbe442f607d6 URL:https://git.kernel.org/stable/c/98a4026b22ff440c7f47056481bcbbe442f607d6 MISC:https://git.kernel.org/stable/c/e38585401d464578d30f5868ff4ca54475c34f7d URL:https://git.kernel.org/stable/c/e38585401d464578d30f5868ff4ca54475c34f7d MISC:https://git.kernel.org/stable/c/ea5ddbc11613b55e5128c85f57b08f907abd9b28 URL:https://git.kernel.org/stable/c/ea5ddbc11613b55e5128c85f57b08f907abd9b28
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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