s390/uv: Don't call folio_wait_writeback() without a folio reference
In the Linux kernel, the following vulnerability has been resolved: s390/uv: Don't call folio_wait_writeback() without a folio reference folio_wait_writeback() requires that no spinlocks are held and that a folio reference is held, as documented. After we dropped the PTL, the folio could get freed concurrently. So grab a temporary reference.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: s390/uv: Don't call folio_wait_writeback() without a folio reference folio_wait_writeback() requires that no spinlocks are held and that a folio reference is held, as documented. After we dropped the PTL, the folio could get freed concurrently. So grab a temporary reference.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/1a1eb2f3fc453dcd52726d13e863938561489cb7
- https://git.kernel.org/stable/c/3f29f6537f54d74e64bac0a390fb2e26da25800d
- https://git.kernel.org/stable/c/8736604ef53359a718c246087cd21dcec232d2fb
- https://git.kernel.org/stable/c/b21aba72aadd94bdac275deab021fc84d6c72b16
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43832.json
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://nvd.nist.gov/vuln/detail/CVE-2024-43832