In the Linux kernel, the following vulnerability has been resolved: netfs: Fix copy-to-cache so that it performs collection with ceph+fscache The netfs copy-to-cache that is used by Ceph with local caching sets up a new request to write data just read to the cache. The request is started and then left to look after itself whilst the app continues. The request gets notified by the backing fs upon completion of the async DIO write, but then tries to wake up the app because NETFS_RREQ_OFFLOAD_COLLECTION isn't set - but the app isn't waiting there, and so the request just hangs. Fix this by setting NETFS_RREQ_OFFLOAD_COLLECTION which causes the notification from the backing filesystem to put the collection onto a work queue instead.
History

Sat, 16 Aug 2025 11:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: netfs: Fix copy-to-cache so that it performs collection with ceph+fscache The netfs copy-to-cache that is used by Ceph with local caching sets up a new request to write data just read to the cache. The request is started and then left to look after itself whilst the app continues. The request gets notified by the backing fs upon completion of the async DIO write, but then tries to wake up the app because NETFS_RREQ_OFFLOAD_COLLECTION isn't set - but the app isn't waiting there, and so the request just hangs. Fix this by setting NETFS_RREQ_OFFLOAD_COLLECTION which causes the notification from the backing filesystem to put the collection onto a work queue instead.
Title netfs: Fix copy-to-cache so that it performs collection with ceph+fscache
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-08-16T11:12:27.014Z

Updated: 2025-08-16T11:12:27.014Z

Reserved: 2025-04-16T04:51:24.023Z

Link: CVE-2025-38534

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2025-08-16T12:15:29.087

Modified: 2025-08-16T12:15:29.087

Link: CVE-2025-38534

cve-icon Redhat

No data.