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CVE-2025-21900

NFSv4: Fix a deadlock when recovering state on a sillyrenamed file PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix a deadlock when recovering state on a sillyrenamed file If the file is sillyrenamed, and slated for delete on close, it is possible for a server reboot to triggeer an open reclaim, with can again race with the application call to close(). When that happens, the call to put_nfs_open_context() can trigger a synchronous delegreturn call which deadlocks because it is not marked as privileged. Instead, ensure that the call to nfs4_inode_return_delegation_on_close() catches the delegreturn, and schedules it asynchronously.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected adb4b42d19aea91826621a8d0bac94cf2c08f8bc before 4fe4ae6c2e01d028856b73b6328b12b8945df871; affected adb4b42d19aea91826621a8d0bac94cf2c08f8bc before f41a60bc43e7abbc636fee78bed0d74c31e738b0; affected adb4b42d19aea91826621a8d0bac94cf2c08f8bc before 8f8df955f078e1a023ee55161935000a67651f38
Linux / Linuxaffected 6.11; unaffected 0 before 6.11; unaffected 6.12.18 through 6.12.*; unaffected 6.13.6 through 6.13.*; unaffected 6.14 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.