NFSD: fix hang in nfsd4_shutdown_callback

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2025-21795 · Microsoft / collected KEV context

cve-program · CVE-2025-21795

• https://git.kernel.org/stable/c/abed68027ea3ab893ac85cc46a00e2e64a324239
• https://git.kernel.org/stable/c/efa8a261c575f816c7e79a87aeb3ef8a0bd6b221
• https://git.kernel.org/stable/c/38d345f612503b850c2973e5a879f88e441b34d7
• https://git.kernel.org/stable/c/23ad7797c74cd8f7f90617f1e59a8703e2b43908
• https://git.kernel.org/stable/c/cedfbb92cf97a6bff3d25633001d9c44442ee854
• https://git.kernel.org/stable/c/e88d2451cd42e025465d6b51fd716a47b0b3800d
• https://git.kernel.org/stable/c/036ac2778f7b28885814c6fbc07e156ad1624d03

No related operational record is retained in the current change model.